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This chapter contains the following sections:
To clear the Link Layer Discovery Protocol (LLDP) statistics, use the clear lldp statistics Privileged EXEC mode command.
clear lldp statistics
N/A
N/A
Privileged EXEC mode
switchxxxxxx# clear lldp statisticsTo specify how long the receiving device holds a LLDP packet before discarding it, use the lldp holdtime-multiplier Global Configuration mode command.
To revert to its default setting, use the no form of this command.
lldp holdtime-multiplier number
no lldp holdtime-multiplier
number—The amount of time that LLDP packets are held before the packets are discarded, measured in multiples of the TLV Advertise Interval. (Range: 2 to 10)
The default LLDP holdtime multiplier is 4.
Global Configuration mode
The time-to-live (TTL) value (the LLDP transmission interval multiplies the holdtime multiplier) should be smaller than 65535.
The actual TTL value of LLDP frames is calculated by the following formula:
TTL = min (65535, LLDP-Timer * LLDP-hold-multiplier)
For example, if the value of the LLDP timer is 30 seconds, and the value of the LLDP holdtime multiplier is 4, then the value 120 is encoded in the TTL field of the LLDP header.
The following example sets the LLDP holdtime interval to 90 seconds:
switchxxxxxx(config)# lldp timer 30
switchxxxxxx(config)# lldp holdtime-multiplier 3To specify how to handle LLDP packets when LLDP is globally disabled, use the lldp lldpdu Global Configuration mode command.
lldp lldpdu {bridging | filtering | flooding}
bridging—Bridges LLDP packets (bridging LLDP PDU to VLAN member ports) when LLDP is globally disabled.
filtering—Filters (deletes) LLDP packets when LLDP is globally disabled.
flooding—Floods (forwards) LLDP packets to all interfaces when LLDP is globally disabled.
LLDP packets are flooded when LLDP is globally disabled.
Global Configuration mode
If the STP mode is set to MSTP, the LLDP packet-handling mode cannot be set to flooding. The STP mode cannot be set to MSTP if the LLDP packet-handling mode is flooding. If LLDP is globally disabled, and the LLDP packet-handling mode is flooding, LLDP packets are treated as data packets with the following exceptions:
VLAN ingress rules are not applied to LLDP packets. LLDP packets are trapped on all ports for which the STP state is Forwarding.
Default deny-all rules are not applied to LLDP packets.
VLAN egress rules are not applied to the packets. LLDP packets are flooded to all ports for which the STP state is Forwarding.
LLDP packets are sent as untagged.
switchxxxxxx(config)# lldp lldpdu floodingTo enable LLDP Media Endpoint Discovery (MED) on an interface, use the lldp med Interface Configuration mode command.
To disable LLDP MED on an interface, use the no form of this command.
lldp med {enable | disable}
no lldp med
enable—Enables LLDP MED on the interface.
disable—Disables LLDP MED on the interface.
LLDP MED is enabled with the network-policy TLV.
Interface Configuration (Ethernet) mode
switchxxxxxx(config)# interface gi3
switchxxxxxx(config-if)# lldp med enableWhen an interface comes up, LLDP can send packets more quickly than usual using its fast start mechanism. To configure the number of packets that is sent during the activation of the fast start mechanism, use the lldp med fast-start-repeat-count Global Configuration mode command.
To revert to its default setting, use the no form of this command.
lldp med fast-start-repeat-count number
no lldp med fast-start-repeat-count
number—The number of times that the fast start LLDPDU is being sent during the activation of the fast start mechanism. (Range: 1 to 10)
The default value is 3.
Global Configuration mode
switchxxxxxx(config)# lldp med fast-start-repeat-count 4To configure the LLDP MED location for an interface, use the lldp med location Interface Configuration mode command.
To remove the LLDP MED location for an interface, use the no form of this command.
lldp med location {civic-address data | coordinate data | ecs-elin data}
no lldp med location {civic-address | coordinate | ecs-elin}
civic-address data—Specifies the location data as a civic address in hexadecimal format.
coordinate data—Specifies the location data as coordinates in hexadecimal format.
ecs-elin data—Specifies the location data as an Emergency Call Service Emergency Location Identification Number (ECS ELIN) in hexadecimal format.
The location is not configured.
Interface Configuration (Ethernet) mode
switchxxxxxx(config)# interface gi2
switchxxxxxx(config-if)# lldp med location civic-address 616263646566To automatically create an LLDP MED network policy for voice application, if the voice VLAN operation mode is auto voice VLAN, use the lldp med network-policy auto Global Configuration mode command. The voice VLAN, 802.1p priority, and the DSCP value of the voice VLAN are used in the policy.
To disable this feature, use the no form of this command.
lldp med network-policy voice auto
no lldp med network-policy voice auto
N/A
Enabled
Global Configuration mode
A network policy for voice LLDP packets can be created by using the lldp med network-policy (global) command. The lldp med network-policy auto Global Configuration mode command allows you to use the configuration of the voice application to create the network policy instead of having to manually configure it.
In the Auto mode, the voice VLAN feature determines on which interfaces to advertise the network policy TLV with the application type voice, and controls the parameters of that TLV.
To enable auto generation of a network policy based on the auto voice VLAN, there must be no manual preconfigured network policies for the voice application. In the Auto mode, you cannot manually define a network policy for the voice application using the lldp med network-policy (global) command.
switchxxxxxx(config)# lldp med network-policy voice autoTo manually define an LLDP MED network policy, use the lldp med network-policy Global Configuration mode command.
To delete an LLDP MED network policy, use the no form of this command.
lldp med network-policy number app {voice | voice-signaling | guest-voice | guest-voice-signaling | softphone-voice | streaming-video | video-conferencing | video-signaling} vlan vlan-id vlan-type { tag | untag } priority priority dscp value
no lldp med network-policy number
number—Network policy index number. (Range: 1 to 32)
app—Specifies the type of the application defined for this network policy. Available application types are:
voice
voice-signaling
guest-voice
guest-voice-signaling
softphone-voice
video-conferencing
streaming-video
video-conferencing
video-signaling
vlan vlan-id—Specifies the VLAN identifier for the application.
vlan-type {tag | untag} —Specifies if the application is using a tagged or an untagged VLAN.
priority priority—Specifies the user priority used for the specified application.
dscp value—Specifies the DSCP value used for the specified application.
No network policy is defined.
Global Configuration mode
This command creates the network policy, which can be attached to a port by using the lldp med network-policy (interface) command.
Use the lldp med network-policy Interface Configuration mode command to attach a network policy to a port.
Up to 32 network policies can be defined.
This example creates a network policy for the voice-signaling application and attaches it to gi1. LLDP packets sent on gi1 will contain information defined in the network policy.
switchxxxxxx(config)# lldp med network-policy 1 app voice-signaling vlan 1 vlan-type untagged priority 1 dscp 2
switchxxxxxx(config)# interface gi1
switchxxxxxx(config-if)# lldp med network-policy add 1To attach (or remove) an LLDP MED network policy to (or from) an interface, use the lldp med network-policy Interface Configuration mode command.
lldp med network-policy {add | remove} number
add number—Attaches the specified network policy to the interface.
remove number—Removes the specified network policy to the interface.
No network policy is attached to the interface.
Interface Configuration (Ethernet) mode
For each interface, only one network policy per application can be defined. Network policies are created by using the lldp med network-policy (global) command.
This example creates a network policy for the voice-signaling application and attaches it to fa11. LLDP packets sent on fa11 will contain information defined in the network policy.
switchxxxxxx(config)# lldp med network-policy 1 app voice-signaling vlan 2 vlan-type untag priority 1 dscp 2
switchxxxxxx(config)# interface gi11
switchxxxxxx(config-if)# lldp med network-policy add 1To specify which LLDP MED TLVs are included, use the lldp med tlv-select Interface Configuration mode command.
To remove all selected LLDP MED TLVs, use the no form of this command.
lldp med tlv-select medtlv1 [medtlv2… medtlv4]
no lldp med tlv-select
medtlv—TLVs that should be included or excluded. Available TLVs are network-policy, location, poe-pse, and inventory. The capabilities TLV is always included if LLDP MED is enabled.
Network-policy TLV
Interface Configuration (Ethernet) mode
The following example enables LLDP MED with the location TLV on gi5:
switchxxxxxx(config)# interface gi5
switchxxxxxx(config-if)# lldp med tlv-select locationTo enable receiving LLDP frames on an interface, use the lldp receive Interface Configuration mode command.
To stop receiving LLDP frames on an interface, use the no form of this command.
lldp receive
no lldp receive
N/A
Enabled
Interface Configuration (Ethernet) mode
LLDP manages LAG ports individually. LLDP data received through the LAG ports is stored individually per port.
LLDP operation on a port is not dependent on the STP state of a port. For example, LLDP frames are received on the blocked ports.
If a port is controlled by 802.1x, LLDP operates only if the port is authorized.
switchxxxxxx(config)# interface gi1
switchxxxxxx(config-if)# lldp receiveTo specify the minimum time that an LLDP-enabled port waits before reinitializing the LLDP transmission, use the lldp reinit Global Configuration mode command.
To revert to its default settings, use the no form of this command.
lldp reinit seconds
no lldp reinit
seconds—The minimum time in seconds that a LLDP port waits before reinitializing the LLDP transmission. (Range: 1 to 10)
2 seconds
Global Configuration mode
switchxxxxxx(config)# lldp reinit 4To enable LLDP globally on the switch, use the lldp run Global Configuration mode command.
To disable LLDP globally on the switch, use the no form of this command.
lldp run
no lldp run
N/A
LLDP is enabled by default.
Global Configuration mode
switchxxxxxx(config)# lldp runTo specify which 802.1x parameters will be advertised, use the lldp tlv-select 802.1 Interface Configuration mode command.
lldp tlv-select 802.1 pvid enable
lldp tlv-select 802.1 pvid disable
lldp tlv-select 802.1 vlan-name add vlan-id
lldp tlv-select 802.1 vlan-name remove vlan-id
pvid enable—Specifies that the PVID is advertised.
pvid disable—Specifies that the PVID is not advertised.
vlan-name add vlan-id—Specifies that the VLAN ID is advertised. (Range: 1 to 4094)
vlan-name remove vlan-id—Specifies that the VLAN ID is not advertised. (Range: 1 to 4094)
802.1 pvid TLV is transmitted.
Interface Configuration (Ethernet) mode
switchxxxxxx(config)# interface gi11
switchxxxxxx(config-if)# lldp tlv-select 802.1 pvid enableTo specify which optional TLVs are transmitted, use the lldp tlv-select TLV Interface Configuration (Ethernet) mode command.
To remove all selected LLDP optional TLVs, use the no form of this command.
lldp tlv-select TLV [TLV ] [TLV ] [TLV ] [TLV ] [TLV ] [TLV ] [TLV ]
no lldp tlv-select
TLV—(Optional) Available optional TLVs are port-desc, sys-name, sys-desc, sys-cap, mac-phy, lag, max-frame-size, and management-addr.
The sys-name and sys-cap TLVs are selected.
Interface Configuration mode
switchxxxxxx(config)# interface gi20
switchxxxxxx(config-if)# lldp tlv-select port-desc sys-name sys-descTo enable transmitting LLDP frames on an interface, use the lldp transmit Interface Configuration mode command.
To stop transmitting LLDP frames on an interface, use the no form of this command.
lldp transmit
no lldp transmit
N/A
Transmitting LLDP is enabled on each interface.
Interface Configuration (Ethernet) mode
LLDP manages LAG ports individually. LLDP sends separate advertisements on each port in a LAG.
LLDP operation on a port is not dependent on the STP state of a port. For example, LLDP frames are sent on the blocked ports.
If a port is controlled by 802.1x, LLDP operates only if the port is authorized.
switchxxxxxx(config)# interface gi5
switchxxxxxx(config-if)# lldp transmitTo set the delay time between two successive LLDP frame transmissions initiated by value or status changes in the LLDP local system MIB, use the lldp tx-delay Global Configuration mode command.
To revert to its default setting, use the no form of this command.
lldp tx-delay seconds
no lldp tx-delay
seconds—The delay time in seconds. (Range: 1 to 8191 seconds)
The default delay time is 2 seconds.
Global Configuration mode
We recommend that the tx-delay is less than 0.25 of the LLDP timer interval.
switchxxxxxx(config)# lldp tx-delay 10To specify how often the system sends the LLDP updates, use the lldp timer Global Configuration mode command.
To revert to its default setting, use the no form of this command.
lldp timer seconds
no lldp timer
seconds—The minimum time in seconds that an LLDP port transmits the advertisement periodically. (Range: 5 to 32767)
30 seconds
Global Configuration mode
LLDP transmission interval multiplies the holdtime multiplier should be smaller than 65535.
The tx-delay cannot be larger than 0.25 of the LLDP transmission interval.
switchxxxxxx(config)# lldp timer 30To show the LLDP status, use the show lldp Privileged EXEC mode command.
show lldp
N/A
Privileged EXEC mode
switchxxxxxx# show lldp
State: Enabled
Timer: 30 Seconds
Hold multiplier: 4
Reinit delay: 2 Seconds
Tx delay: 2 Seconds
LLDP packet handling: Flooding
Port | State | Optional TLVs | Address
-------- + ------ + -------------- + --------
gi1 | RX,TX | SN, SC |192.168.1.254
gi2 | RX,TX | SN, SC |192.168.1.254
gi3 | RX,TX | SN, SC |192.168.1.254
gi4 | RX,TX | SN, SC |192.168.1.254
gi5 | RX,TX | SN, SC |192.168.1.254
gi6 | RX,TX | SN, SC |192.168.1.254
gi7 | RX,TX | SN, SC |192.168.1.254
gi8 | RX,TX | SN, SC |192.168.1.254
gi9 | RX,TX | SN, SC |192.168.1.254
gi10 | RX,TX | SN, SC |192.168.1.254
gi11 | RX,TX | SN, SC |192.168.1.254
gi12 | RX,TX | SN, SC |192.168.1.254
gi13 | RX,TX | SN, SC |192.168.1.254
gi14 | RX,TX | SN, SC |192.168.1.254
gi15 | RX,TX | SN, SC |192.168.1.254
gi16 | RX,TX | SN, SC |192.168.1.254
gi17 | RX,TX | SN, SC |192.168.1.254
gi18 | RX,TX | SN, SC |192.168.1.254
gi19 | RX,TX | SN, SC |192.168.1.254
gi20 | RX,TX | SN, SC |192.168.1.254
gi21 | RX,TX | SN, SC |192.168.1.254
gi22 | RX,TX | SN, SC |192.168.1.254
gi23 | RX,TX | SN, SC |192.168.1.254
gi24 | RX,TX | SN, SC |192.168.1.254
gi25 | RX,TX | SN, SC |192.168.1.254
gi26 | RX,TX | SN, SC |192.168.1.254
gi27 | RX,TX | SN, SC |192.168.1.254
gi28 | RX,TX | SN, SC |192.168.1.254
Port ID: gi1
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi2
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi3
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi4
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi5
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi6
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi7
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi8
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi9
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi10
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi11
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi12
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi13
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi14
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi15
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi16
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi17
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi18
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi19
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi20
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi21
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi22
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi23
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi24
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi25
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi26
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi27
802.3 optional TLVs:
802.1 optional TLVs
PVID: Enabled
Port ID: gi28
802.3 optional TLVs:
802.1 optional TLVs
PVID: EnabledTo show the LLDP configuration for specific interfaces, use the show lldp interfaces Privileged EXEC mode command.
show lldp interfaces interface-id
interface-id—An interface ID or a list of interface IDs.
Privileged EXEC mode
switchxxxxxx# show lldp interfaces gi11
State: Enabled
Timer: 30 Seconds
Hold multiplier: 4
Reinit delay: 2 Seconds
Tx delay: 2 Seconds
LLDP packet handling: Flooding
Port | State | Optional TLVs | Address
-------- + ------ + -------------- + --------
gi11 | RX,TX | SN, SC |192.168.1.254
Port ID: gi11
802.3 optional TLVs:
802.1 optional TLVs
PVID: EnabledTo show the status of LLDP TLVs overloading for specific interfaces, use the show lldp interfaces tlvs-overloading Privileged EXEC mode command.
show lldp interfaces interface-id tlvs-overloading
interface-id—An interface ID or a list of interface IDs.
Privileged EXEC mode
When an LLDP packet contains too much information for one packet, this is called overloading.
The command calculates the overloading status of the current LLDP configuration, not for the last LLDP packet that was sent.
switchxxxxxx# show lldp interfaces gi11 tlvs-overloading
gi11:
TLVs Group | Bytes | Status
---------------------------- + ------- + ----------------
Mandatory | 22 | Transmitted
LLDP-MED Capabilities | 9 | Transmitted
LLDP-MED Network Policies | 10 | Transmitted
Optional | 20 | Transmitted
802.1 | 8 | Transmitted
Total: 69 bytes
Left: 1419 bytesTo show LLDP information that is advertised from specific interfaces, use the show lldp local-device Privileged EXEC mode command.
show lldp [interfaces interface-id] local-device
interfaces interface-id—(Optional) Specifies an interface ID or a list of interface IDs. If not specified, the command displays some common information of local device.
Privileged EXEC mode
Example 1—The following example displays the LLDP local device information that is advertised from fa11:
switchxxxxxx# show lldp interfaces gi11 local-device
Device ID: 00:E0:4C:86:70:01
Port ID: gi11
System Name: switchxxxxxx
Capabilities: Bridge
System description: 28-Port Gigabit PoE Smart Switch
Port description:
Time To Live: 120
802.1 PVID: 1
LLDP-MED capabilities: Capabilities, Network Policy
LLDP-MED Device type: Network ConnectivityExample 2—The following example displays the LLDP local device information:
switchxxxxxx# show lldp local-device
LLDP Local Device Information:
Chassis Type : Mac Address
Chassis ID : DE:AD:BE:EF:01:02
System Name : SwitchEF0102
System Description :
System Capabilities Support : Bridge
System Capabilities Enable : Bridge
Management Address : 192.168.1.254(IPv4)To display the LLDP MED configuration for specific interfaces, use the show lldp med Privileged EXEC mode command.
show lldp [interfaces interface-id] med
interfaces interface-id—(Optional) Specifies an interface ID or a list of interface IDs. If not specified, the command displays information for all interfaces.
Privileged EXEC mode
Example 1—The following example shows the LLDP MED configuration for all interfaces:
switchxxxxxx# show lldp med
Fast Start Repeat Count: 3
lldp med network-policy voice: auto
Port | Capabilities | Network Policy | Location | Inventory | POE
------ + ------------- + -------------- + -------- + ----------+ -----
gi1 | Yes | Yes | No | No | No
gi2 | Yes | Yes | No | No | No
gi3 | Yes | Yes | No | No | No
gi4 | Yes | Yes | No | No | No
gi5 | Yes | Yes | No | No | No
gi6 | Yes | Yes | No | No | No
gi7 | Yes | Yes | No | No | No
gi8 | Yes | Yes | No | No | No
gi9 | Yes | Yes | No | No | No
gi10 | Yes | Yes | No | No | No
gi11 | Yes | Yes | No | No | No
gi12 | Yes | Yes | No | No | No
gi13 | Yes | Yes | No | No | No
gi14 | Yes | Yes | No | No | No
gi15 | Yes | Yes | No | No | No
gi16 | Yes | Yes | No | No | No
gi17 | Yes | Yes | No | No | No
gi18 | Yes | Yes | No | No | No
gi19 | Yes | Yes | No | No | No
gi20 | Yes | Yes | No | No | No
gi21 | Yes | Yes | No | No | No
gi22 | Yes | Yes | No | No | No
gi23 | Yes | Yes | No | No | No
gi24 | Yes | Yes | No | No | No
gi25 | Yes | Yes | No | No | No
gi26 | Yes | Yes | No | No | No
gi27 | Yes | Yes | No | No | No
gi28 | Yes | Yes | No | No | NoExample 2—The following example shows the LLDP MED configuration for gi11:
switchxxxxxx# show lldp interfaces gi11 med
Port | Capabilities | Network Policy | Location | Inventory | POE
------ + ------------- + -------------- + -------- + ----------+ -----
gi11 | Yes | Yes | No | No | No
Port ID: gi11
Network policies:To show information about neighboring devices discovered using LLDP, use the show lldp neighbor Privileged EXEC mode command.
show lldp [interfaces interface-id] neighbor
interfaces interface-id—(Optional) Specifies an interface ID or a list of interface IDs. If not specified, the command displays information for all interfaces.
Privileged EXEC mode
A TLV value that cannot be displayed as an ASCII string is displayed as an hexadecimal string.
switchxxxxxx# show lldp neighbor
Port | Device ID | Port ID | SysName | Capabilities | TTL
---- + ---------- + ---------- + ------------ + ------------ + -----The following table describes the significant fields shown in the example:
|
Field |
Description |
|---|---|
|
Port |
Local port number. |
|
Device ID |
The neighbor device’s configured ID (name) or MAC address. |
|
Port ID |
The neighbor device’s port ID. |
|
SysName |
The neighbor device’s administratively assigned name. |
|
Capabilities |
The capabilities discovered on the neighbor device. Possible values are:
|
|
TTL |
Time interval in seconds after which the information for this neighbor is deleted. |
To show the LLDP statistics for specific interfaces, use the show lldp statistics Privileged EXEC mode command.
show lldp [interfaces interface-id] statistics
interfaces interface-id—(Optional) Specifies an interface ID or a list of interface IDs. If not specified, the command displays information for all interfaces.
Privileged EXEC mode
switchxxxxxx# show lldp interfaces gi1-2 statistics
LLDP Port Statistics:
| TX Frames | RX Frames | RX TLVs | RX Ageouts
Port | Total | Total | Discarded | Errors | Discarded | Unrecognized | Total
--------+-----------+-------+-----------+--------+-----------+--------------+----------
gi1 | 0 | 0 | 0 | 0 | 0 | 0 | 0
gi2 | 0 | 0 | 0 | 0 | 0 | 0 | 0The following table describes the significant fields shown in the example:
|
Field |
Description |
|---|---|
|
Port |
Identifier of interface. |
|
TX Frames Total |
Total number of transmitted frames. |
|
RX Frames Total |
Total number of received frames. |
|
RX Frames Discarded |
Total number of received frames that were discarded. |
|
RX Frames Errors |
Total number of received frames with errors. |
|
RX TLVs Discarded |
Total number of received TLVs that were discarded. |
|
RX TLVs Unrecognized |
Total number of received TLVs that were unrecognized. |
|
RX Ageouts Total |
Number of neighbor age outs on the interface. |
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