Catalyst 3750 Switch Command Reference, 12.2(25)SE

Catalyst 3750 Switch Cisco IOS Commands

aaa accounting dot1x

Use the aaa accounting dot1x interface configuration command to enable authentication, authorization, and accounting (AAA) accounting and to create method lists defining specific accounting methods on a per-line or per-interface basis for 802.1x sessions. Use the no form of this command to disable 802.1x accounting.

aaa accounting dot1x {name | default} start-stop {broadcast group {name | radius | tacacs+} [group {name | radius | tacacs+} ... ] | group {name | radius | tacacs+} [group {name | radius | tacacs+} ... ]}

no aaa accounting dot1x {name | default}

Syntax Description

Defaults

AAA accounting is disabled.

Command Modes

Global configuration

Command History

Usage Guidelines

This command requires access to a RADIUS server.

Note We recommend that you enter the dot1x reauthentication interface configuration command before configuring 802.1x RADIUS accounting on an interface.

Examples

This example shows how to configure 802.1x accounting:

Switch(config)# aaa accounting dot1x

Switch(config)#

Note The RADIUS authentication server must be properly configured to accept and log update or watchdog packets from the AAA client.

Related Commands

aaa authentication dot1x

Use the aaa authentication dot1x global configuration command on the switch stack or on a standalone switch to specify the authentication, authorization, and accounting (AAA) method to use on ports complying with IEEE 802.1x. Use the no form of this command to disable authentication.

aaa authentication dot1x {default} method1

no aaa authentication dot1x {default}

Syntax Description

Note Though other keywords are visible in the command-line help strings, only the default and group radius keywords are supported.

Defaults

No authentication is performed.

Command Modes

Global configuration

Command History

Usage Guidelines

The method argument identifies the method that the authentication algorithm tries in the given sequence to validate the password provided by the client. The only method that is truly 802.1x-compliant is the group radius method, in which the client data is validated against a RADIUS authentication server.

If you specify group radius, you must configure the RADIUS server by entering the radius-server host global configuration command.

Use the show running-config privileged EXEC command to display the configured lists of authentication methods.

Examples

This example shows how to enable AAA and how to create an 802.1x-compliant authentication list. This authentication first tries to contact a RADIUS server. If this action returns an error, the user is not allowed access to the network.

Switch(config)# aaa new-model

Switch(config)# aaa authentication dot1x default group radius

You can verify your settings by entering the show running-config privileged EXEC command.

Related Commands

action

Use the action access map configuration command on the switch stack or on a standalone switch to set the action for the VLAN access map entry. Use the no form of this command to set the action to the default value, which is to forward.

action {drop | forward}

no action

Syntax Description

Defaults

The default action is to forward packets.

Command Modes

Access-map configuration

Command History

Usage Guidelines

You enter access-map configuration mode by using the vlan access-map global configuration command.

If the action is drop, you should define the access map, including configuring any access control list (ACL) names in match clauses, before applying the map to a VLAN, or all packets could be dropped.

In access map configuration mode, use the match access map configuration command to define the match conditions for a VLAN map. Use the action command to set the action that occurs when a packet matches the conditions.

The drop and forward parameters are not used in the no form of the command.

Examples

This example shows how to identify and apply a VLAN access map vmap4 to VLANs 5 and 6 that causes the VLAN to forward an IP packet if the packet matches the conditions defined in access list al2:

Switch(config)# vlan access-map vmap4

Switch(config-access-map)# match ip address al2

Switch(config-access-map)# action forward

Switch(config-access-map)# exit

Switch(config)# vlan filter vmap4 vlan-list 5-6

You can verify your settings by entering the show vlan access-map privileged EXEC command.

Related Commands

archive copy-sw

Use the archive copy-sw privileged EXEC command on the stack master to copy the running image from the flash memory on one stack member to the flash memory on one or more other stack members.

archive copy-sw [/destination-system destination-stack-member-number] [/force-reload] [leave-old-sw] [/no-set-boot] [/overwrite] [/reload] [/safe] source-stack-member-number

Syntax Description

Command Modes

Privileged EXEC

Command History

Usage Guidelines

The current software image is not overwritten with the copied image.

Both the software image and HTML files are copied.

The new image is copied to the flash: file system.

The BOOT environment variable is changed to point to the new software image on the flash: file system.

Image names are case sensitive; the image file is provided in tar format.

Note To successfully use the archive copy-sw privileged EXEC command, you must have downloaded from a TFTP server the images for both the stack member switch being added and the stack master. You use the archive download-sw privileged EXEC command to perform the download.

At least one stack member must be running the image that is to be copied to the switch that has incompatible software.

You can copy the image to more than one specific stack member by repeating the /destination-system destination-stack-member-number option in the command for each stack member to be upgraded. If you do not specify the destination-stack-member-number, the default is to copy the running image file to all stack members.

Using the /safe or /leave-old-sw option can cause the new copied image to fail if there is insufficient flash memory. If leaving the software in place would prevent the new image from fitting in flash memory due to space constraints, an error results.

If you used the /leave-old-sw option and did not overwrite the old image when you copied the new one, you can remove the old image by using the delete privileged EXEC command. For more information, see the "delete" section.

Use the /overwrite option to overwrite the image on the flash device with the copied one.

If you specify the command without the /overwrite option, the algorithm verifies that the new image is not the same as the one on the switch flash device or is not running on any stack members. If the images are the same, the copy does not occur. If the images are different, the old image is deleted, and the new one is copied.

After copying a new image, enter the reload privileged EXEC command to begin using the new image, or specify the /reload or /force-reload option in the archive copy-sw command.

You can enter one or more of these options with the source-stack-member-number option:

•/destination-system destination-stack-member-number

•/force-reload

•/leave-old-sw

•/no-set-boot

•/overwrite

•/reload

•/safe

If you enter the source-stack-member-number option before one of the previous options, you can enter only the archive copy-sw source-stack-member-number command.

These are examples of how you can enter the archive copy-sw command:

•To copy the running image from a stack member to another stack member and to overwrite the software image in the second stack member's flash memory (if it already exists) with the copied one, enter the archive copy-sw /destination destination-stack-member-number /overwrite source-stack-member-number command.

•To copy the running image from a stack member to another stack member, keep the current software image, and reload the system after the image copies, enter the archive copy-sw /destination destination-stack-member-number /safe /reload source-stack-member-number command.

Examples

This example shows how to copy the running image from stack member 6 to stack member 8:

Switch# archive copy-sw /destination-system 8 6

This example shows how to copy the running image from stack member 6 to all the other stack members:

Switch# archive copy-sw 6

This example shows how to copy the running image from stack member 5 to stack member 7. If the image being copied already exists on the second stack member's flash memory, it can be overwritten with the copied one. The system reloads after the image is copied:

Switch# archive copy-sw /destination-system 7 /overwrite /force-reload 5

Related Commands

archive download-sw

Use the archive download-sw privileged EXEC command on the switch stack or on a standalone switch to download a new image from a TFTP server to the switch or switch stack and to overwrite or keep the existing image.

archive download-sw {/force-reload | /imageonly | /leave-old-sw | /no-set-boot | /no-version-check | /destination-system stack-member-number | /only-system-type system-type | /overwrite | /reload | /safe} source-url

Syntax Description

Defaults

The current software image is not overwritten with the downloaded image.

Both the software image and HTML files are downloaded.

The new image is downloaded to the flash: file system.

The BOOT environment variable is changed to point to the new software image on the flash: file system.

Image names are case sensitive; the image file is provided in tar format.

Compatibility of the stack protocol version on the image to be downloaded is checked with the version on the switch stack.

Command Modes

Privileged EXEC

Command History

Usage Guidelines

The /imageonly option removes the HTML files for the existing image if the existing image is being removed or replaced. Only the Cisco IOS image (without the HTML files) is downloaded.

Using the /safe or /leave-old-sw option can cause the new image download to fail if there is insufficient flash memory. If leaving the software in place prevents the new image from fitting in flash memory due to space constraints, an error results.

If you used the /leave-old-sw option and did not overwrite the old image when you downloaded the new one, you can remove the old image by using the delete privileged EXEC command. For more information, see the "delete" section.

Use the /no-version-check option if you want to download an image that has a different stack protocol version than the one existing on the switch stack. You must use this option with the /destination-system option to specify the specific stack member to be upgraded with the image.

Note Use the /no-version-check option with care. All stack members, including the stack master, must have the same stack protocol version to be in the same switch stack. This option allows an image to be downloaded without first confirming the compatibility of its stack protocol version with the version of the switch stack.

You can upgrade more than one specific stack member by repeating the /destination-system option in the command for each stack member to be upgraded.

Use the /overwrite option to overwrite the image on the flash device with the downloaded one.

If you specify the command without the /overwrite option, the download algorithm verifies that the new image is not the same as the one on the switch flash device or is not running on any stack members. If the images are the same, the download does not occur. If the images are different, the old image is deleted, and the new one is downloaded.

After downloading a new image, enter the reload privileged EXEC command to begin using the new image, or specify the /reload or /force-reload option in the archive download-sw command.

Examples

This example shows how to download a new image from a TFTP server at 172.20.129.10 and overwrite the image on the switch:

Switch# archive download-sw /overwrite tftp://172.20.129.10/test-image.tar 

This example shows how to download only the software image from a TFTP server at 172.20.129.10 to the switch:

Switch# archive download-sw /imageonly tftp://172.20.129.10/test-image.tar 

This example shows how to keep the old software version after a successful download:

Switch# archive download-sw /leave-old-sw tftp://172.20.129.10/test-image.tar 

This example shows how to specifically upgrade stack members 6 and 8:

Switch# archive download-sw /imageonly /destination-system 6 /destination-system 8 
tftp://172.20.129.10/test-image.tar

Related Commands

archive tar

Use the archive tar privileged EXEC command on the switch stack or on a standalone switch to create a tar file, list files in a tar file, or extract the files from a tar file.

archive tar {/create destination-url flash:/file-url} | {/table source-url} | {/xtract source-url flash:/file-url [dir/file...]}

Syntax Description

Defaults

None

Command Modes

Privileged EXEC

Command History

Usage Guidelines

Filenames and directory names are case sensitive.

Image names are case sensitive.

Examples

This example shows how to create a tar file. The command writes the contents of the new-configs directory on the local flash device to a file named saved.tar on the TFTP server at 172.20.10.30:

Switch# archive tar /create tftp:172.20.10.30/saved.tar flash:/new-configs

This example shows how to display the contents of the c3750-tv0-m.tar file that is in flash memory. The contents of the tar file appear on the screen:

Switch# archive tar /table flash:c3750-tv0-m.tar

info (219 bytes)

c3750-tv0-mz-121/ (directory)

c3750-tv0-mz-121/html/ (directory)

c3750-tv0-mz-121/html/foo.html (0 bytes)

c3750-tv0-mz-121/vegas-tv0-mz-121.bin (610856 bytes)

c3750-tv0-mz-121/info (219 bytes)

info.ver (219 bytes)

This example shows how to display only the c3750-tv0-mz-121/html directory and its contents:

Switch# archive tar /table flash:c3750-tv0-m.tar c3750-tv0-mz-121/html

c3750-tv0-mz-121/html/ (directory)

c3750-tv0-mz-121/html/foo.html (0 bytes)

This example shows how to extract the contents of a tar file on the TFTP server at 172.20.10.30. This command extracts just the new-configs directory into the root directory on the local flash file system. The remaining files in the saved.tar file are ignored.

Switch# archive tar /xtract tftp:/172.20.10.30/saved.tar flash:/ new-configs

Related Commands

archive upload-sw

Use the archive upload-sw privileged EXEC command on the switch stack or on a standalone switch to upload an existing switch image to a server.

archive upload-sw [/source-system-num stack member number | /version version_string] destination-url

Syntax Description

Defaults

Uploads the currently running image from the flash: file system.

Command Modes

Privileged EXEC

Command History

Usage Guidelines

You must specify the /source-system-num option to use the /version option. Using these options together uploads the specified image, not the running image, of a specific stack member.

Use the upload feature only if the HTML files associated with the embedded device manager have been installed with the existing image.

The files are uploaded in this sequence: the Cisco IOS image, the HTML files, and info. After these files are uploaded, the software creates the tar file.

Image names are case sensitive.

Examples

This example shows how to upload the currently running on stack member 6 image to a TFTP server at 172.20.140.2:

Switch# archive upload-sw /source-system-num 6 tftp://172.20.140.2/test-image.tar 

Related Commands

arp access-list

Use the arp access-list global configuration command on the switch stack or on a standalone switch to define an Address Resolution Protocol (ARP) access control list (ACL) or to add clauses to the end of a previously defined list. Use the no form of this command to delete the specified ARP access list.

arp access-list acl-name

no arp access-list acl-name

This command is available only if your switch is running the enhanced multilayer image (EMI).

Syntax Description

Defaults

No ARP access lists are defined.

Command Modes

Global configuration

Command History

Usage Guidelines

After entering the arp access-list command, you enter ARP access-list configuration mode, and these configuration commands are available:

•default: returns a command to its default setting.

•deny: specifies packets to reject. For more information, see the "deny (ARP access-list configuration)" section.

•exit: exits ARP access-list configuration mode.

•no: negates a command or sets its defaults.

•permit: specifies packets to forward. For more information, see the "permit (ARP access-list configuration)" section.

Use the permit and deny access-list configuration commands to forward and to drop ARP packets based on the specified matching criteria.

When the ARP ACL is defined, you can apply it to a VLAN by using the ip arp inspection filter vlan global configuration command. ARP packets containing only IP-to-MAC address bindings are compared against the ACL. All other types of packets are bridged in the ingress VLAN without validation. If the ACL permits a packet, the switch forwards it. If the ACL denies a packet because of an explicit deny statement, the switch drops the packet. If the ACL denies a packet because of an implicit deny statement, the switch compares the packet against the list of DHCP bindings (unless the ACL is static, which means that packets are not compared against the bindings).

Examples

This example shows how to define an ARP access list and to permit both ARP requests and ARP responses from a host with an IP address of 1.1.1.1 and a MAC address of 0000.0000.abcd:

Switch(config)# arp access-list static-hosts

Switch(config-arp-nacl)# permit ip host 1.1.1.1 mac host 00001.0000.abcd

Switch(config-arp-nacl)# end

You can verify your settings by entering the show arp access-list privileged EXEC command.

Related Commands

auto qos voip

Use the auto qos voip interface configuration command on the switch stack or on a standalone switch to automatically configure quality of service (QoS) for voice over IP (VoIP) within a QoS domain. Use the no form of this command to return to the default setting.

auto qos voip {cisco-phone | cisco-softphone | trust}

no auto qos voip [cisco-phone | cisco-softphone | trust]

Syntax Description

Defaults

Auto-QoS is disabled on the port.

When auto-QoS is enabled, it uses the ingress packet label to categorize traffic, to assign packet labels, and to configure the ingress and egress queues as shown in Table 2-1.

Table 2-2 shows the generated auto-QoS configuration for the ingress queues.

Table 2-3 shows the generated auto-QoS configuration for the egress queues.

Command Modes

Interface configuration

Command History

Usage Guidelines

Use this command to configure the QoS appropriate for VoIP traffic within the QoS domain. The QoS domain includes the switch, the interior of the network, and edge devices that can classify incoming traffic for QoS.

In releases earlier than Cisco IOS Release 12.2(20)SE, auto-QoS configures the switch only for VoIP with Cisco IP Phones on switch ports.

In Cisco IOS Release 12.2(20)SE or later, auto-QoS configures the switch for VoIP with Cisco IP Phones on switch and routed ports and for VoIP with devices running the Cisco SoftPhone application. These releases support only Cisco IP SoftPhone Version 1.3(3) or later. Connected devices must use Cisco Call Manager Version 4 or later.

To take advantage of the auto-QoS defaults, you should enable auto-QoS before you configure other QoS commands. You can fine-tune the auto-QoS configuration after you enable auto-QoS.

Note The switch applies the auto-QoS-generated commands as if the commands were entered from the command-line interface (CLI). An existing user configuration can cause the application of the generated commands to fail or to be overridden by the generated commands. These actions occur without warning. If all the generated commands are successfully applied, any user-entered configuration that was not overridden remains in the running configuration. Any user-entered configuration that was overridden can be retrieved by reloading the switch without saving the current configuration to memory. If the generated commands fail to be applied, the previous running configuration is restored.

If this is the first port on which you have enabled auto-QoS, the auto-QoS-generated global configuration commands are executed followed by the interface configuration commands. If you enable auto-QoS on another port, only the auto-QoS-generated interface configuration commands for that port are executed.

When you enable the auto-QoS feature on the first port, these automatic actions occur:

•QoS is globally enabled (mls qos global configuration command), and other global configuration commands are added.

•When you enter the auto qos voip cisco-phone interface configuration command on a port at the edge of the network that is connected to a Cisco IP Phone, the switch enables the trusted boundary feature. The switch uses the Cisco Discovery Protocol (CDP) to detect the presence or absence of a Cisco IP Phone. When a Cisco IP Phone is detected, the ingress classification on the port is set to trust the QoS label received in the packet. When a Cisco IP Phone is absent, the ingress classification is set to not trust the QoS label in the packet. The switch configures ingress and egress queues on the port according to the settings in Table 2-2 and Table 2-3.

•When you enter the auto qos voip cisco-softphone interface configuration command on a port at the edge of the network that is connected to a device running the Cisco SoftPhone, the switch uses policing to decide whether a packet is in or out of profile and to specify the action on the packet. If the packet does not have a DSCP value of 24, 26, or 46 or is out of profile, the switch changes the DSCP value to 0. The switch configures ingress and egress queues on the port according to the settings in Table 2-2 and Table 2-3.

•When you enter the auto qos voip trust interface configuration command on a port connected to the interior of the network, the switch trusts the CoS value for nonrouted ports or the DSCP value for routed ports in ingress packets (the assumption is that traffic has already been classified by other edge devices). The switch configures the ingress and egress queues on the port according to the settings in Table 2-2 and Table 2-3.

You can enable auto-QoS on static, dynamic-access, and voice VLAN access, and trunk ports. When enabling auto-QoS with a Cisco IP Phone on a routed port, you must assign a static IP address to the IP phone.

Note When a device running Cisco SoftPhone is connected to a switch or routed port, the switch supports only one Cisco SoftPhone application per port.

After auto-QoS is enabled, do not modify a policy map or aggregate policer that includes AutoQoS in its name. If you need to modify the policy map or aggregate policer, make a copy of it, and change the copied policy map or policer. To use the new policy map instead of the generated one, remove the generated policy map from the interface, and apply the new policy map.

To display the QoS configuration that is automatically generated when auto-QoS is enabled, enable debugging before you enable auto-QoS. Use the debug auto qos privileged EXEC command to enable auto-QoS debugging. For more information, see the debug auto qos command.

To disable auto-QoS on a port, use the no auto qos voip interface configuration command. Only the auto-QoS-generated interface configuration commands for this port are removed. If this is the last port on which auto-QoS is enabled and you enter the no auto qos voip command, auto-QoS is considered disabled even though the auto-QoS-generated global configuration commands remain (to avoid disrupting traffic on other ports affected by the global configuration). You can use the no mls qos global configuration command to disable the auto-QoS-generated global configuration commands. With QoS disabled, there is no concept of trusted or untrusted ports because the packets are not modified (the CoS, DSCP, and IP precedence values in the packet are not changed). Traffic is switched in pass-through mode (packets are switched without any rewrites and classified as best effort without any policing).

Examples

This example shows how to enable auto-QoS and to trust the QoS labels received in incoming packets when the switch or router connected to the port is a trusted device:

Switch(config)# interface gigabitethernet2/0/1

Switch(config-if)# auto qos voip trust

You can verify your settings by entering the show auto qos interface interface-id privileged EXEC command.

Related Commands

boot auto-copy-sw

Use the boot auto-copy-sw global configuration command from the stack master to enable the automatic upgrade (auto-upgrade) process. It automatically upgrades a switch in version-mismatch (VM) mode by copying the running software image on any stack member or by copying a tar file image in switch stack flash memory. Use the no form of this command to disable the auto-upgrade process.

boot auto-copy-sw

no boot auto-copy-sw

Syntax Description

This command has no arguments or keywords.

Defaults

Enabled.

Command Modes

Global configuration

Command History

Usage Guidelines

A switch in VM mode is a switch that has a different minor version number than the version on the switch stack. A switch in VM mode cannot join the switch stack as a fully functioning member. If the switch stack has an image that can be copied to a switch in VM mode, the auto-upgrade process automatically copies the image from a stack member to the switch in VM mode. The switch then exits VM mode, reboots, and joins the switch stack as a fully functioning member.

The auto-upgrade process affects only switches in VM mode. It does not affect existing stack members.

Related Commands

boot boothlpr

Use the boot boothlpr global configuration command on the switch stack or on a standalone switch to load a special Cisco IOS image, which when loaded into memory, can load a second Cisco IOS image into memory and launch it. This variable is used only for internal development and testing. Use the no form of this command to return to the default setting.

boot boothlpr filesystem:/file-url

no boot boothlpr

Syntax Description

Defaults

No helper image is loaded.

Command Modes

Global configuration

Command History

Usage Guidelines

Filenames and directory names are case sensitive.

This command changes the setting of the BOOTHLPR environment variable. For more information, see "Catalyst 3750 Switch Boot Loader Commands."

Related Commands

boot config-file

Use the boot config-file global configuration command on a standalone switch to specify the filename that Cisco IOS uses to read and write a nonvolatile copy of the system configuration. Use the no form of this command to return to the default setting.

boot config-file flash:/file-url

no boot config-file

Syntax Description

Defaults

The default configuration file is flash:config.text.

Command Modes

Global configuration

Command History

Usage Guidelines

This command works properly only from a standalone switch.

Filenames and directory names are case sensitive.

This command changes the setting of the CONFIG_FILE environment variable. For more information, see "Catalyst 3750 Switch Boot Loader Commands."

Related Commands

boot enable-break

Use the boot enable-break global configuration command on a standalone switch to enable interrupting the automatic boot process. Use the no form of this command to return to the default setting.

boot enable-break

no boot enable-break

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled. The automatic boot process cannot be interrupted by pressing the Break key on the console.

Command Modes

Global configuration

Command History

Usage Guidelines

This command works properly only from a standalone switch.

When you enter this command, you can interrupt the automatic boot process by pressing the Break key on the console after the flash file system is initialized.

Note Despite the setting of this command, you can interrupt the automatic boot process at any time by pressing the MODE button on the switch front panel.

This command changes the setting of the ENABLE_BREAK environment variable. For more information, see "Catalyst 3750 Switch Boot Loader Commands."

Related Commands

boot helper

Use the boot helper global configuration command on the switch stack or on a standalone switch to dynamically load files during boot loader initialization to extend or patch the functionality of the boot loader. Use the no form of this command to return to the default.

boot helper filesystem:/file-url ...

no boot helper

Syntax Description

Defaults

No helper files are loaded.

Command Modes

Global configuration

Command History

Usage Guidelines

This variable is used only for internal development and testing.

Filenames and directory names are case sensitive.

This command changes the setting of the HELPER environment variable. For more information, see "Catalyst 3750 Switch Boot Loader Commands."

Related Commands

boot helper-config-file

Use the boot helper-config-file global configuration command on the switch stack or on a standalone switch to specify the name of the configuration file to be used by the Cisco IOS helper image. If this is not set, the file specified by the CONFIG_FILE environment variable is used by all versions of Cisco IOS that are loaded. Use the no form of this command to return to the default setting.

boot helper-config-file filesystem:/file-url

no boot helper-config file

Syntax Description

Defaults

No helper configuration file is specified.

Command Modes

Global configuration

Command History

Usage Guidelines

This variable is used only for internal development and testing.

Filenames and directory names are case sensitive.

This command changes the setting of the HELPER_CONFIG_FILE environment variable. For more information, see "Catalyst 3750 Switch Boot Loader Commands."

Related Commands

boot manual

Use the boot manual global configuration command on a standalone switch to enable manually booting the switch during the next boot cycle. Use the no form of this command to return to the default setting.

boot manual

no boot manual

Syntax Description

This command has no arguments or keywords.

Defaults

Manual booting is disabled.

Command Modes

Global configuration

Command History

Usage Guidelines

This command works properly only from a standalone switch.

The next time you reboot the system, the switch is in boot loader mode, which is shown by the switch: prompt. To boot the system, use the boot boot loader command, and specify the name of the bootable image.

This command changes the setting of the MANUAL_BOOT environment variable. For more information, see "Catalyst 3750 Switch Boot Loader Commands."

Related Commands

boot private-config-file

Use the boot private-config-file global configuration command on a standalone switch to specify the filename that Cisco IOS uses to read and write a nonvolatile copy of the private configuration. Use the no form of this command to return to the default setting.

boot private-config-file filename

no boot private-config-file

Syntax Description

Defaults

The default configuration file is private-config.

Command Modes

Global configuration

Command History

Usage Guidelines

This command works properly only from a standalone switch.

Filenames are case sensitive.

Examples

This example shows how to specify the name of the private configuration file to be pconfig:

Switch(config)# boot private-config-file pconfig

Related Commands

boot system

Use the boot system global configuration command on a standalone switch to specify the Cisco IOS image to load during the next boot cycle. Use the no form of this command to return to the default setting.

boot system filesystem:/file-url ...

no boot system

Syntax Description

Defaults

The switch attempts to automatically boot the system by using information in the BOOT environment variable. If this variable is not set, the switch attempts to load and execute the first executable image it can by performing a recursive, depth-first search throughout the flash file system. In a depth-first search of a directory, each encountered subdirectory is completely searched before continuing the search in the original directory.

Command Modes

Global configuration

Command History

Usage Guidelines

This command works properly only from a standalone switch.

Filenames and directory names are case sensitive.

If you are using the archive download-sw privileged EXEC command to maintain system images, you never need to use the boot system command. The boot system command is automatically manipulated to load the downloaded image.

This command changes the setting of the BOOT environment variable. For more information, see "Catalyst 3750 Switch Boot Loader Commands."

Related Commands

channel-group

Use the channel-group interface configuration command on the switch stack or on a standalone switch to assign an Ethernet port to an EtherChannel group. Use the no form of this command to remove an Ethernet port from an EtherChannel group.

channel-group channel-group-number mode {active | {auto [non-silent] | desirable [non-silent] | on} | passive}

no channel-group

Syntax Description

Defaults

No channel groups are assigned.

No mode is configured.

Command Modes

Interface configuration

Command History

Usage Guidelines

For Layer 2 EtherChannels, you do not have to create a port-channel interface first by using the interface port-channel global configuration command before assigning a physical port to a channel group. Instead, you can use the channel-group interface configuration command. It automatically creates the port-channel interface when the channel group gets its first physical port if the logical interface is not already created. If you create the port-channel interface first, the channel-group-number can be the same as the port-channel-number, or you can use a new number. If you use a new number, the channel-group command dynamically creates a new port channel.

You do not have to disable the IP address that is assigned to a physical port that is part of a channel group, but we strongly recommend that you do so.

You create Layer 3 port channels by using the interface port-channel command followed by the no switchport interface configuration command. You should manually configure the port-channel logical interface before putting the interface into the channel group.

After you configure an EtherChannel, configuration changes that you make on the port-channel interface apply to all the physical ports assigned to the port-channel interface. Configuration changes applied to the physical port affect only the port where you apply the configuration. To change the parameters of all ports in an EtherChannel, apply configuration commands to the port-channel interface, for example, spanning-tree commands or commands to configure a Layer 2 EtherChannel as a trunk.

If you do not specify non-silent with the auto or desirable mode, silent is assumed. The silent mode is used when the switch is connected to a device that is not PAgP-capable and seldom, if ever, sends packets. A example of a silent partner is a file server or a packet analyzer that is not generating traffic. In this case, running PAgP on a physical port prevents that port from ever becoming operational. However, it allows PAgP to operate, to attach the port to a channel group, and to use the port for transmission. Both ends of the link cannot be set to silent.

With the on mode, a usable EtherChannel exists only when a port group in the on mode is connected to another port group in the on mode. The on keyword is the only setting that is supported when the EtherChannel members are from different switches in the switch stack (cross-stack EtherChannel).

Caution You should exercise care when setting the mode to on (manual configuration). All ports configured in the on mode are bundled in the same group and are forced to have similar characteristics. If the group is misconfigured, packet loss or spanning-tree loops might occur.

A cross-stack EtherChannel supports up to two 10-Gigabit Ethernet interfaces.

Do not configure an EtherChannel in both the PAgP and LACP modes. EtherChannel groups running PAgP and LACP can coexist on the same switch or on different switches in the stack (but not in a cross-stack configuration). Individual EtherChannel groups can run either PAgP or LACP, but they cannot interoperate.

If you set the protocol by using the channel-protocol interface configuration command, the setting is not overridden by the channel-group interface configuration command.

Do not configure a port that is an active or a not-yet-active member of an EtherChannel as an 802.1x port. If you try to enable 802.1x on an EtherChannel port, an error message appears, and 802.1x is not enabled.

Note If 802.1x is enabled on a not-yet active port of an EtherChannel in software releases earlier than Cisco IOS Release 12.2(18)SE, the port does not join the EtherChannel.

Do not configure a secure port as part of an EtherChannel or an EtherChannel port as a secure port.

For a complete list of configuration guidelines, see the "Configuring EtherChannels" chapter in the software guide for this release.

Caution Do not enable Layer 3 addresses on the physical EtherChannel ports. Do not assign bridge groups on the physical EtherChannel ports because it creates loops.

Examples

This example shows how to configure an EtherChannel on a single switch in the stack. It assigns two static-access ports in VLAN 10 to channel 5 with the PAgP mode desirable:

Switch# configure terminal 

Switch(config)# interface range gigabitethernet2/0/1 -2 

Switch(config-if-range)# switchport mode access

Switch(config-if-range)# switchport access vlan 10

Switch(config-if-range)# channel-group 5 mode desirable 

Switch(config-if-range)# end 

This example shows how to configure an EtherChannel on a single switch in the stack. It assigns two static-access ports in VLAN 10 to channel 5 with the LACP mode active:

Switch# configure terminal 

Switch(config)# interface range gigabitethernet2/0/1 -2 

Switch(config-if-range)# switchport mode access

Switch(config-if-range)# switchport access vlan 10

Switch(config-if-range)# channel-group 5 mode active 

Switch(config-if-range)# end 

This example shows how to configure a cross-stack EtherChannel. It assigns two ports on stack member 2 and one port on stack member 3 as static-access ports in VLAN 10 to channel 5 with the PAgP and LACP modes disabled (on):

Switch# configure terminal 

Switch(config)# interface range gigabitethernet2/0/4 -5 

Switch(config-if-range)# switchport mode access

Switch(config-if-range)# switchport access vlan 10

Switch(config-if-range)# channel-group 5 mode on 

Switch(config-if-range)# exit

Switch(config)# interface gigabitethernet3/0/3 

Switch(config-if)# switchport mode access

Switch(config-if)# switchport access vlan 10

Switch(config-if)# channel-group 5 mode on 

Switch(config-if)# exit

You can verify your settings by entering the show running-config privileged EXEC command.

Related Commands

channel-protocol

Use the channel-protocol interface configuration command on the switch stack or on a standalone switch to restrict the protocol used on a port to manage channeling. Use the no form of this command to return to the default setting.

channel-protocol {lacp | pagp}

no channel-protocol

Syntax Description

Defaults

No protocol is assigned to the EtherChannel.

Command Modes

Interface configuration

Command History

Usage Guidelines

Use the channel-protocol command only to restrict a channel to LACP or PAgP. If you set the protocol by using the channel-protocol command, the setting is not overridden by the channel-group interface configuration command.

You must use the channel-group interface configuration command to configure the EtherChannel parameters. The channel-group command also can set the mode for the EtherChannel.

You cannot enable both the PAgP and LACP modes on an EtherChannel group.

PAgP and LACP are not compatible; both ends of a channel must use the same protocol.

Examples

This example shows how to specify LACP as the protocol that manages the EtherChannel:

Switch(config-if)# channel-protocol lacp

You can verify your settings by entering the show etherchannel [channel-group-number] protocol privileged EXEC command.

Related Commands

class

Use the class policy-map configuration command on the switch stack or on a standalone switch to define a traffic classification match criteria (through the police, set, and trust policy-map class configuration commands) for the specified class-map name. Use the no form of this command to delete an existing class map.

class class-map-name

no class class-map-name

Syntax Description

Defaults

No policy map class-maps are defined.

Command Modes

Policy-map configuration

Command History

Usage Guidelines

Before using the class command, you must use the policy-map global configuration command to identify the policy map and to enter policy-map configuration mode. After specifying a policy map, you can configure a policy for new classes or modify a policy for any existing classes in that policy map. You attach the policy map to a port by using the service-policy interface configuration command.

After entering the class command, you enter policy-map class configuration mode, and these configuration commands are available:

•exit: exits policy-map class configuration mode and returns to policy-map configuration mode.

•no: returns a command to its default setting.

•police: defines a policer or aggregate policer for the classified traffic. The policer specifies the bandwidth limitations and the action to take when the limits are exceeded. For more information, see the police and police aggregate policy-map class commands.

•set: specifies a value to be assigned to the classified traffic. For more information, see the set command.

•trust: defines a trust state for traffic classified with the class or the class-map command. For more information, see the trust command.

To return to policy-map configuration mode, use the exit command. To return to privileged EXEC mode, use the end command.

The class command performs the same function as the class-map global configuration command. Use the class command when a new classification, which is not shared with any other ports, is needed. Use the class-map command when the map is shared among many ports.

Examples

This example shows how to create a policy map called policy1. When attached to the ingress direction, it matches all the incoming traffic defined in class1, sets the IP Differentiated Services Code Point (DSCP) to 10, and polices the traffic at an average rate of 1 Mbps and bursts at 20 KB. Traffic exceeding the profile is marked down to a DSCP value obtained from the policed-DSCP map and then sent.

Switch(config)# policy-map policy1

Switch(config-pmap)# class class1

Switch(config-pmap-c)# set dscp 10

Switch(config-pmap-c)# police 1000000 20000 exceed-action policed-dscp-transmit

Switch(config-pmap-c)# exit

You can verify your settings by entering the show policy-map privileged EXEC command.

Related Commands

class-map

Use the class-map global configuration command on the switch stack or on a standalone switch to create a class map to be used for matching packets to the class whose name you specify and to enter class-map configuration mode. Use the no form of this command to delete an existing class map and to return to global configuration mode.

class-map [match-all | match-any] class-map-name

no class-map [match-all | match-any] class-map-name

Syntax Description

Defaults

No class maps are defined.

If neither the match-all or match-any keyword is specified, the default is match-all.

Command Modes

Global configuration

Command History

Usage Guidelines

Use this command to specify the name of the class for which you want to create or modify class-map match criteria and to enter class-map configuration mode.

The class-map command and its subcommands are used to define packet classification, marking, and aggregate policing as part of a globally named service policy applied on a per-port basis.

After you are in quality of service (QoS) class-map configuration mode, these configuration commands are available:

•description: describes the class map (up to 200 characters). The show class-map privileged EXEC command displays the description and the name of the class-map.

•exit: exits from QoS class-map configuration mode.

•match: configures classification criteria. For more information, see the match (class-map configuration) command.

•no: removes a match statement from a class map.

•rename: renames the current class map. If you rename a class map with a name that is already used, the message A class-map with this name already exists appears.

To define packet classification on a physical-port basis, only one match command per class map is supported. In this situation, the match-all and match-any keywords are equivalent.

Only one access control list (ACL) can be configured in a class map. The ACL can have multiple access control entries (ACEs).

Examples

This example shows how to configure the class map called class1 with one match criterion, which is an access list called 103:

Switch(config)# access-list 103 permit any any dscp 10

Switch(config)# class-map class1

Switch(config-cmap)# match access-group 103

Switch(config-cmap)# exit

This example shows how to delete the class map class1:

Switch(config)# no class-map class1

You can verify your settings by entering the show class-map privileged EXEC command.

Related Commands

clear ip arp inspection log

Use the clear ip arp inspection log privileged EXEC command on the switch stack or on a standalone switch to clear the dynamic Address Resolution Protocol (ARP) inspection log buffer.

clear ip arp inspection log

This command is available only if your switch is running the enhanced multilayer image (EMI).

Syntax Description

This command has no arguments or keywords.

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Examples

This example shows how to clear the contents of the log buffer:

Switch# clear ip arp inspection log

You can verify that the log was cleared by entering the show ip arp inspection log privileged command.

Related Commands

clear ip arp inspection statistics

Use the clear ip arp inspection statistics privileged EXEC command on the switch stack or on a standalone switch to clear the dynamic Address Resolution Protocol (ARP) inspection statistics.

clear ip arp inspection statistics [vlan vlan-range]

This command is available only if your switch is running the enhanced multilayer image (EMI).

Syntax Description

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Examples

This example shows how to clear the statistics from VLAN 1:

Switch# clear ip arp inspection statistics vlan 1

You can verify that the statistics were deleted by entering the show ip arp inspection statistics vlan 1 privileged EXEC command.

Related Commands

clear ip dhcp snooping database

Use the clear ip dhcp snooping database privileged EXEC command on the switch stack or on a standalone switch to clear the DHCP binding database agent statistics.

clear ip dhcp snooping database statistics

This command is available only if your switch is running the enhanced multilayer image (EMI).

Syntax Description

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Usage Guidelines

When you enter the clear ip dhcp snooping database statistics command, the switch does not update the entries in the binding database and in the binding file before clearing the statistics.

Examples

This example shows how to clear the DHCP snooping binding database agent statistics:

Switch# clear ip dhcp snooping database statistics 

You can verify that the statistics were cleared by entering the show ip dhcp snooping database privileged EXEC command.

Related Commands

clear ipc

Use the clear ipc privileged EXEC command on the switch stack or on a standalone switch to clear Interprocess Communications Protocol (IPC) statistics.

clear ipc {queue-statistics | statistics}

Syntax Description

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Usage Guidelines

You can clear all statistics by using the clear ipc statistics command, or you can clear only the queue statistics by using the clear ipc queue-statistics command.

Examples

This example shows how to clear all statistics:

Switch# clear ipc statistics

This example shows how to clear only the queue statistics:

Switch# clear ipc queue-statistics

You can verify that the statistics were deleted by entering the show ipc rpc or the show ipc session privileged EXEC command.

Related Commands

clear l2protocol-tunnel counters

Use the clear l2protocol-tunnel counters privileged EXEC command on the switch stack or on a standalone switch to clear the protocol counters in protocol tunnel ports.

clear l2protocol-tunnel counters [interface-id]

Syntax Description

Defaults

This command has no defaults.

Command Modes

Privileged EXEC

Command History

Usage Guidelines

Use this command to clear protocol tunnel counters on the switch or on the specified interface.

Examples

This example shows how to clear Layer 2 protocol tunnel counters on an interface:

Switch# clear l2protocol-tunnel counters gigabitethernet0/3

Related Commands

clear lacp

Use the clear lacp privileged EXEC command on the switch stack or on a standalone switch to clear Link Aggregation Control Protocol (LACP) channel-group counters.

clear lacp {channel-group-number counters | counters}

Syntax Description

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Usage Guidelines

You can clear all counters by using the clear lacp counters command, or you can clear only the counters for the specified channel group by using the clear lacp channel-group-number counters command.

Examples

This example shows how to clear all channel-group information:

Switch# clear lacp counters

This example shows how to clear LACP traffic counters for group 4:

Switch# clear lacp 4 counters

You can verify that the information was deleted by entering the show lacp counters or the show lacp 4 counters privileged EXEC command.

Related Commands

clear mac address-table

Use the clear mac address-table privileged EXEC command on the switch stack or on a standalone switch to delete from the MAC address table a specific dynamic address, all dynamic addresses on a particular interface, all dynamic addresses on stack members, or all dynamic addresses on a particular VLAN. This command also clears the MAC address notification global counters.

clear mac address-table {dynamic [address mac-addr | interface interface-id | vlan vlan-id] | notification}

Note Beginning with Cisco IOS Release 12.1(19)EA1, the clear mac address-table command replaces the clear mac- address-table command (with the hyphen).

Syntax Description

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Examples

This example shows how to remove a specific MAC address from the dynamic address table:

Switch# clear mac address-table dynamic address 0008.0070.0007

You can verify that the information was deleted by entering the show mac address-table privileged EXEC command.

Related Commands

clear pagp

Use the clear pagp privileged EXEC command on the switch stack or on a standalone switch to clear Port Aggregation Protocol (PAgP) channel-group information.

clear pagp {channel-group-number counters | counters}

Syntax Description

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Usage Guidelines

You can clear all counters by using the clear pagp counters command, or you can clear only the counters for the specified channel group by using the clear pagp channel-group-number counters command.

Examples

This example shows how to clear all channel-group information:

Switch# clear pagp counters

This example shows how to clear PAgP traffic counters for group 10:

Switch# clear pagp 10 counters

You can verify that information was deleted by entering the show pagp privileged EXEC command.

Related Commands

clear spanning-tree counters

Use the clear spanning-tree counters privileged EXEC command on the switch stack or on a standalone switch to clear the spanning-tree counters.

clear spanning-tree counters [interface interface-id]

Syntax Description

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Usage Guidelines

If the interface-id is not specified, spanning-tree counters are cleared for all interfaces.

Examples

This example shows how to clear spanning-tree counters for all interfaces:

Switch# clear spanning-tree counters

Related Commands

clear spanning-tree detected-protocols

Use the clear spanning-tree detected-protocols privileged EXEC command on the switch stack or on a standalone switch to restart the protocol migration process (force the renegotiation with neighboring switches) on all interfaces or on the specified interface.

clear spanning-tree detected-protocols [interface interface-id]

Syntax Description

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Usage Guidelines

A switch running the rapid per-VLAN spanning-tree plus (rapid-PVST+) protocol or the Multiple Spanning Tree Protocol (MSTP) supports a built-in protocol migration mechanism that enables it to interoperate with legacy 802.1D switches. If a rapid-PVST+ switch or an MSTP switch receives a legacy 802.1D configuration bridge protocol data unit (BPDU) with the protocol version set to 0, it sends only 802.1D BPDUs on that port. A multiple spanning-tree (MST) switch can also detect that a port is at the boundary of a region when it receives a legacy BPDU, an MST BPDU (Version 3) associated with a different region, or a rapid spanning-tree (RST) BPDU (Version 2).

However, the switch does not automatically revert to the rapid-PVST+ or the MSTP mode if it no longer receives 802.1D BPDUs because it cannot learn whether the legacy switch has been removed from the link unless the legacy switch is the designated switch. Use the clear spanning-tree detected-protocols command in this situation.

Examples

This example shows how to restart the protocol migration process on a port:

Switch# clear spanning-tree detected-protocols interface gigabitethernet2/0/1

Related Commands

clear vmps statistics

Use the clear vmps statistics privileged EXEC command on the switch stack or on a standalone switch to clear the statistics maintained by the VLAN Query Protocol (VQP) client.

clear vmps statistics

Syntax Description

This command has no arguments or keywords.

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Examples

This example shows how to clear VLAN Membership Policy Server (VMPS) statistics:

Switch# clear vmps statistics

You can verify that information was deleted by entering the show vmps statistics privileged EXEC command.

Related Commands

clear vtp counters

Use the clear vtp counters privileged EXEC command on the switch stack or on a standalone switch to clear the VLAN Trunking Protocol (VTP) and pruning counters.

clear vtp counters

Syntax Description

This command has no arguments or keywords.

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Examples

This example shows how to clear the VTP counters:

Switch# clear vtp counters

You can verify that information was deleted by entering the show vtp counters privileged EXEC command.

Related Commands

cluster commander-address

You do not need to enter this command from the switch stack or from a standalone cluster member switch. The cluster command switch automatically provides its MAC address to cluster member switches when these switches join the cluster. The cluster member switch adds this information and other cluster information to its running configuration file. Use the no form of this global configuration command from the cluster member switch console port to remove the switch from a cluster only during debugging or recovery procedures.

cluster commander-address mac-address [member number name name]

no cluster commander-address

Syntax Description

Defaults

The switch is not a member of any cluster.

Command Modes

Global configuration

Command History

Usage Guidelines

This command is available only on the cluster command switch stack or the cluster command switch.

A cluster member can have only one cluster command switch.

The cluster member switch retains the identity of the cluster command switch during a system reload by using the mac-address parameter.

You can enter the no form on a cluster member switch to remove it from the cluster during debugging or recovery procedures. You would normally use this command from the cluster member switch console port only when the member has lost communication with the cluster command switch. With normal switch configuration, we recommend that you remove cluster member switches only by entering the no cluster member n global configuration command on the cluster command switch.

When a standby cluster command switch becomes active (becomes the cluster command switch), it removes the cluster commander address line from its configuration.

Examples

This is partial sample output from the running configuration of a cluster member.

Switch(config)# show running-configuration

<output truncated>

cluster commander-address 00e0.9bc0.a500 member 4 name my_cluster

<output truncated>

This example shows how to remove a member from the cluster by using the cluster member console.

Switch # configure terminal

Enter configuration commands, one per line.  End with CNTL/Z.

Switch(config)# no cluster commander-address

You can verify your settings by entering the show cluster privileged EXEC command.

Related Commands

cluster discovery hop-count

Use the cluster discovery hop-count global configuration command on the switch stack or on the a cluster command switch on the cluster command switch to set the hop-count limit for extended discovery of candidate switches. Use the no form of this command to return to the default setting.

cluster discovery hop-count number

no cluster discovery hop-count

Syntax Description

Defaults

The hop count is set to 3.

Command Modes

Global configuration

Command History

Usage Guidelines

This command is available only on the cluster command switch stack or cluster command switch. This command does not operate on cluster member switches.

If the hop count is set to 1, it disables extended discovery. The cluster command switch discovers only candidates that are one hop from the edge of the cluster. The edge of the cluster is the point between the last discovered cluster member switch and the first discovered candidate switch.

Examples

This example shows how to set hop count limit to 4. This command is executed on the cluster command switch.

Switch(config)# cluster discovery hop-count 4

You can verify your setting by entering the show cluster privileged EXEC command.

Related Commands

cluster enable

Use the cluster enable global configuration command on a command-capable switch or switch stack to enable it as the cluster command switch, assign a cluster name, and to optionally assign a member number to it. Use the no form of the command to remove all members and to make the cluster command switch a candidate switch.

cluster enable name [command-switch-member-number]

no cluster enable

Syntax Description

Defaults

The switch is not a cluster command switch.

No cluster name is defined.

The member number is 0 when the switch is the cluster command switch.

Command Modes

Global configuration

Command History

Usage Guidelines

Enter this command on any command-capable switch that is not part of any cluster. This command fails if a device is already configured as a member of the cluster.

You must name the cluster when you enable the cluster command switch. If the switch is already configured as the cluster command switch, this command changes the cluster name if it is different from the previous cluster name.

Examples

This example shows how to enable the cluster command switch, name the cluster, and set the cluster command switch member number to 4.

Switch(config)# cluster enable Engineering-IDF4 4

You can verify your setting by entering the show cluster privileged EXEC command on the cluster command switch.

Related Commands

cluster holdtime

Use the cluster holdtime global configuration command on the switch stack or on the a cluster command switch to set the duration in seconds before a switch (either the command or cluster member switch) declares the other switch down after not receiving heartbeat messages. Use the no form of this command to set the duration to the default value.

cluster holdtime holdtime-in-secs

no cluster holdtime

Syntax Description

Defaults

The default holdtime is 80 seconds.

Command Modes

Global configuration

Command History

Usage Guidelines

Enter this command with the cluster timer global configuration command only on the cluster command switch. The cluster command switch propagates the values to all its cluster members so that the setting is consistent among all switches in the cluster.

The holdtime is typically set as a multiple of the interval timer (cluster timer). For example, it takes (holdtime-in-secs divided by the interval-in-secs) number of heartbeat messages to be missed in a row to declare a switch down.

Examples

This example shows how to change the interval timer and the duration on the cluster command switch.

Switch(config)# cluster timer 3

Switch(config)# cluster holdtime 30

You can verify your settings by entering the show cluster privileged EXEC command.

Related Commands

cluster member

Use the cluster member global configuration command on the cluster command switch to add candidates to a cluster. Use the no form of the command to remove members from the cluster.

cluster member [n] mac-address H.H.H [password enable-password] [vlan vlan-id]

no cluster member n

Syntax Description

Defaults

A newly enabled cluster command switch has no associated cluster members.

Command Modes

Global configuration

Command History

Usage Guidelines

Enter this command only on the cluster command switch to add a candidate to or remove a member from the cluster. If you enter this command on a switch other than the cluster command switch, the switch rejects the command and displays an error message.

You must enter a member number to remove a switch from the cluster. However, you do not need to enter a member number to add a switch to the cluster. The cluster command switch selects the next available member number and assigns it to the switch that is joining the cluster.

You must enter the enable password of the candidate switch for authentication when it joins the cluster. The password is not saved in the running or startup configuration. After a candidate switch becomes a member of the cluster, its password becomes the same as the cluster command-switch password.

If a switch does not have a configured host name, the cluster command switch appends a member number to the cluster command-switch host name and assigns it to the cluster member switch.

If you do not specify a VLAN ID, the cluster command switch automatically chooses a VLAN and adds the candidate to the cluster.

Examples

This example shows how to add a switch as member 2 with MAC address 00E0.1E00.2222 and the password key to a cluster. The cluster command switch adds the candidate to the cluster through VLAN 3.

Switch(config)# cluster member 2 mac-address 00E0.1E00.2222 password key vlan 3

This example shows how to add a switch with MAC address 00E0.1E00.3333 to the cluster. This switch does not have a password. The cluster command switch selects the next available member number and assigns it to the switch that is joining the cluster.

Switch(config)# cluster member mac-address 00E0.1E00.3333

You can verify your settings by entering the show cluster members privileged EXEC command on the cluster command switch.

Related Commands

cluster outside-interface

Use the cluster outside-interface global configuration command on the switch stack or on the a cluster command switch to configure the outside interface for cluster Network Address Translation (NAT) so that a member without an IP address can communicate with devices outside the cluster. Use the no form of this command to return to the default setting.

cluster outside-interface interface-id

no cluster outside-interface

Syntax Description

Defaults

The default outside interface is automatically selected by the cluster command switch.

Command Modes

Global configuration

Command History

Usage Guidelines

Enter this command only on the cluster command switch. If you enter this command on a cluster member switch, an error message appears.

Examples

This example shows how to set the outside interface to VLAN 1:

Switch(config)# cluster outside-interface vlan 1

You can verify your setting by entering the show running-config privileged EXEC command.

Related Commands

cluster run

Use the cluster run global configuration command to enable clustering on a switch. Use the no form of this command to disable clustering on a switch.

cluster run

no cluster run

Syntax Description

This command has no arguments or keywords.

Defaults

Clustering is enabled on all switches.

Command Modes

Global configuration

Command History

Usage Guidelines

When you enter the no cluster run command on a cluster command switch or cluster command switch stack, the cluster command switch is disabled. Clustering is disabled, and the switch cannot become a candidate switch.

When you enter the no cluster run command on a cluster member switch, it is removed from the cluster. Clustering is disabled, and the switch cannot become a candidate switch.

When you enter the no cluster run command on a switch that is not part of a cluster, clustering is disabled on this switch. This switch cannot then become a candidate switch.

Examples

This example shows how to disable clustering on the cluster command switch:

Switch(config)# no cluster run

You can verify your setting by entering the show cluster privileged EXEC command.

Related Commands

cluster standby-group

Use the cluster standby-group global configuration command to enable cluster command-switch redundancy by binding the cluster to an existing Hot Standby Router Protocol (HSRP). Entering the routing-redundancy keyword enables the same HSRP group to be used for cluster command-switch redundancy and routing redundancy. Use the no form of this command to return to the default setting.

cluster standby-group HSRP-group-name [routing-redundancy]

no cluster standby-group

Syntax Description

Defaults

The cluster is not bound to any HSRP group.

Command Modes

Global configuration

Command History

Usage Guidelines

Enter this command only on the cluster command switch. If you enter it on a cluster member switch, an error message appears.

The cluster command switch propagates the cluster-HSRP binding information to all cluster-HSRP capable members. Each cluster member switch stores the binding information in its NVRAM. The HSRP group name must be a valid standby group; otherwise, the command exits with an error.

The same group name should be used on all members of the HSRP standby group that is to be bound to the cluster. The same HSRP group name should also be used on all cluster-HSRP capable members for the HSRP group that is to be bound. (When not binding a cluster to an HSRP group, you can use different names on the cluster commander and the members.)

Examples

This example shows how to bind the HSRP group named my_hsrp to the cluster. This command is executed on the cluster command switch.

Switch(config)# cluster standby-group my_hsrp 

This example shows how to use the same HSRP group named my_hsrp for routing redundancy and cluster redundancy.

Switch(config)# cluster standby-group my_hsrp routing-redundancy

This example shows the error message when this command is executed on a cluster command switch and the specified HSRP standby group does not exist:

Switch(config)# cluster standby-group my_hsrp 

%ERROR: Standby (my_hsrp) group does not exist

This example shows the error message when this command is executed on a cluster member switch:

Switch(config)# cluster standby-group my_hsrp routing-redundancy

%ERROR: This command runs on a cluster command switch

You can verify your settings by entering the show cluster privileged EXEC command. The output shows whether redundancy is enabled in the cluster.

Related Commands

cluster timer

Use the cluster timer global configuration command on the switch stack or on the a cluster command switch to set the interval in seconds between heartbeat messages. Use the no form of this command to set the interval to the default value.

cluster timer interval-in-secs

no cluster timer

Syntax Description

Defaults

The interval is 8 seconds.

Command Modes

Global configuration

Command History

Usage Guidelines

Enter this command with the cluster holdtime global configuration command only on the cluster command switch. The cluster command switch propagates the values to all its cluster members so that the setting is consistent among all switches in the cluster.

The holdtime is typically set as a multiple of the heartbeat interval timer (cluster timer). For example, it takes (holdtime-in-secs divided by the interval-in-secs) number of heartbeat messages to be missed in a row to declare a switch down.

Examples

This example shows how to change the heartbeat interval timer and the duration on the cluster command switch:

Switch(config)# cluster timer 3

Switch(config)# cluster holdtime 30

You can verify your settings by entering the show cluster privileged EXEC command.

Related Commands

define interface-range

Use the define interface-range global configuration command on the switch stack or on a standalone switch to create an interface-range macro. Use the no form of this command to delete the defined macro.

define interface-range macro-name interface-range

no define interface-range macro-name interface-range

Syntax Description

Defaults

This command has no default setting.

Command Modes

Global configuration

Command History

Usage Guidelines

The macro name is a 32-character maximum character string.

A macro can contain up to five ranges.

All interfaces in a range must be the same type; that is, all Fast Ethernet ports, all Gigabit Ethernet ports, all EtherChannel ports, or all VLANs, but you can combine multiple interface types in a macro.

When entering the interface-range, use this format:

•type {first-interface} - {last-interface}

•You must add a space between the first interface number and the hyphen when entering an interface-range. For example, gigabitethernet 1/0/1 - 2 is a valid range; gigabitethernet 1/0/1-2 is not a valid range

Valid values for type and interface:

•vlan vlan-id, where vlan-id is from 1 to 4094

VLAN interfaces must have been configured with the interface vlan command (the show running-config privileged EXEC command displays the configured VLAN interfaces). VLAN interfaces not displayed by the show running-config command cannot be used in interface-ranges.

•port-channel port-channel-number, where port-channel-number is from 1 to 48

•fastethernet stack member/module/{first port} - {last port}

•gigabitethernet stack member/module/{first port} - {last port}

For physical interfaces:

•stack member is the number used to identify the switch within the stack. The number ranges from 1 to 9 and is assigned to the switch the first time the stack member initializes.

•module is always 0.

•the range is type stack member/0/number - number (for example, gigabitethernet 1/0/1 - 2).

When you define a range, you must enter a space before the hyphen (-), for example:

gigabitethernet1/0/1 - 2

You can also enter multiple ranges. When you define multiple ranges, you must enter a space after the first entry before the comma (,). The space after the comma is optional, for example:

fastethernet1/0/3, gigabitethernet1/0/1 - 2

fastethernet1/0/3 -4, gigabitethernet1/0/1 - 2

Examples

This example shows how to create a multiple-interface macro:

Switch(config)# define interface-range macro1 fastethernet1/0/1 - 2, gigabitethernet1/0/1 
- 2

Related Commands

delete

Use the delete privileged EXEC command on the switch stack or on a standalone switch to delete a file or directory on the flash memory device.

delete [/force] [/recursive] filesystem:/file-url

Syntax Description

Command Modes

Privileged EXEC

Command History

Usage Guidelines

If you use the /force keyword, you are prompted once at the beginning of the deletion process to confirm the deletion.

If you use the /recursive keyword without the /force keyword, you are prompted to confirm the deletion of every file.

The prompting behavior depends on the setting of the file prompt global configuration command. By default, the switch prompts for confirmation on destructive file operations. For more information about this command, see the Cisco IOS Command Reference for Release 12.1.

Examples

This example shows how to remove the directory that contains the old software image after a successful download of a new image:

Switch# delete /force /recursive flash:/old-image

You can verify that the directory was removed by entering the dir filesystem: privileged EXEC command.

Related Commands

deny (ARP access-list configuration)

Use the deny Address Resolution Protocol (ARP) access-list configuration command on the switch stack or on a standalone switch to deny an ARP packet based on matches against the DHCP bindings. Use the no form of this command to remove the specified access control entry (ACE) from the access list.

deny {[request] ip {any | host sender-ip | sender-ip sender-ip-mask} mac {any | host sender-mac | sender-mac sender-mac-mask} | response ip {any | host sender-ip | sender-ip sender-ip-mask} [{any | host target-ip | target-ip target-ip-mask}] mac {any | host sender-mac | sender-mac sender-mac-mask} [{any | host target-mac | target-mac target-mac-mask}]} [log]

no deny {[request] ip {any | host sender-ip | sender-ip sender-ip-mask} mac {any | host sender-mac | sender-mac sender-mac-mask} | response ip {any | host sender-ip | sender-ip sender-ip-mask} [{any | host target-ip | target-ip target-ip-mask}] mac {any | host sender-mac | sender-mac sender-mac-mask} [{any | host target-mac | target-mac target-mac-mask}]} [log]

This command is available only if your switch is running the enhanced multilayer image (EMI).

Syntax Description

Defaults

There are no default settings. However, at the end of the ARP access list, there is an implicit deny ip any mac any command.

Command Modes

ARP access-list configuration

Command History