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To configure port channel Link Aggregation Control Protocol (LACP) graceful convergence, use the lacp graceful-convergence command. To disable graceful convergence on a port channel interface, use the no form of this command.
lacp graceful-convergence
no lacp graceful-convergence
This command has no arguments or keywords.
Enabled
Interface configuration mode
Release |
Modification |
---|---|
5.2(1)N1(1) |
This command was introduced. |
You can use this command only on a port channel interface that is in an administratively down state. You cannot configure (or disable) LACP graceful convergence on a port chanel that is in an administratively up state. If you do so, you will see the following error message:
ERROR: Cannot set/reset lacp graceful-convergence for port-channel10 that is admin up
![]() Note | To avoid port suspension, we recommend that you disable graceful convergence on LACP ports on a peer switch that is not running Cisco NX-OS. |
This command does not require a license.
This example shows how to enable LACP graceful convergence on a port channel:
switch# configure terminal switch(config)# interface port-channel 100 switch(config-if)# shutdown switch(config-if)# lacp graceful-convergence switch(config-if)#
This example shows how to disable LACP graceful convergence on a port channel:
switch# configure terminal switch(config)# interface port-channel 100 switch(config-if)# no lacp graceful-convergence switch(config-if)#
Command |
Description |
---|---|
show lacp |
Displays LACP information. |
show running-config |
Displays the running system configuration. |
To set the priority for the physical interfaces for the Link Aggregation Control Protocol (LACP), use the lacp port-priority command. To return the port priority to the default value, use the no form of this command.
lacp port-priority priority
no lacp port-priority
priority |
Priority for the physical interfaces. The range of valid numbers is from 1 to 65535. |
System priority value is 32768.
Interface configuration mode
Release |
Modification |
---|---|
5.2(1)N1(1) |
This command was introduced. |
Each port configured to use LACP has an LACP port priority. You can configure a value between 1 and 65535. LACP uses the port priority in combination with the port number to form the port identifier. The port priority is used with the port number to form the port identifier. The port priority is used to decide which ports should be put into standby mode when there is a hardware limitation that prevents all compatible ports from aggregating.
![]() Note | When setting the priority, note that a higher number means a lower priority. |
This example shows how to set the LACP port priority for the interface to 2000:
switch# configure terminal switch(config)# interface ethernet 1/5 switch(config-if)# lacp port-priority 2000 switch(config-if)#
Command |
Description |
---|---|
show lacp |
Displays LACP information. |
To configure the rate at which control packets are sent by the Link Aggregation Control Protocol (LACP), use the lacp rate fast command. To restore the rate to 30 seconds, use the no form of this command or the lacp rate normal command.
lacp rate fast
no lacp rate
no lacp rate fast
lacp rate normal
This command has no arguments or keywords.
1 second
Interface configuration mode
Release |
Modification |
---|---|
5.2(1)N1(1) |
This command was introduced. |
You must enable LACP before using this command.
You can configure the LACP rate fast feature on the LACP ports of a Cisco Nexus 5000 Series switch or a Cisco Nexus 2000 Series Fabric Extender that is connected to a Cisco Nexus 5000 Series switch.
The LACP rate fast feature is used to set the rate (once every second) at which the LACP control packets are sent to an LACP-supported interface. The normal rate at which LACP packets are sent is 30 seconds.
This example shows how to configure the LACP fast rate feature on a specified Ethernet interface:
switch(config)# interface ethernet 1/1 switch(config-if)# lacp rate fast
This example shows how to remove the LACP fast rate configuration from a specified Ethernet interface:
switch(config)# interface ethernet 1/1 switch(config-if)# no lacp rate fast
Command |
Description |
---|---|
feature lacp |
Enables or disables LACP on the switch. |
interface ethernet |
Enters Ethernet interface configuration mode. |
show lacp |
Displays the LACP configuration information. |
To enable Link Aggregation Control Protocol (LACP) port suspension on a port channel, use the lacp suspend-individual command. To disable port suspension on a port channel interface, use the no form of this command.
lacp suspend-individual
no lacp suspend-individual
This command has no arguments or keywords.
Disabled
Interface configuration mode
Release |
Modification |
---|---|
5.2(1)N1(1) |
This command was introduced. |
LACP sets a port to the suspended state if it does not receive an LACP bridge protocol data unit (BPDU) from the peer ports in a port channel. This can cause some servers to fail to boot up as they require LACP to logically bring up the port.
This command does not require a license.
This example shows how to enable LACP port suspension on a port channel:
switch# configure terminal switch(config)# interface port-channel 100 switch(config-if)# shutdown switch(config-if)# lacp suspend-individual switch(config-if)#
This example shows how to disable LACP port suspension on a port channel:
switch# configure terminal switch(config)# interface port-channel 100 switch(config-if)# shutdown switch(config-if)# no lacp suspend-individual switch(config-if)#
Command |
Description |
---|---|
show lacp |
Displays LACP information. |
show running-config |
Displays the running system configuration. |
To set the system priority of the switch for the Link Aggregation Control Protocol (LACP), use the lacp system-priority command. To return the system priority to the default value, use the no form of this command.
lacp system-priority priority
no lacp system-priority
priority |
Priority for the physical interfaces. The range of valid numbers is from 1 to 65535 . |
System priority value is 32768.
Global configuration mode
Release |
Modification |
---|---|
5.2(1)N1(1) |
This command was introduced. |
Each device that runs LACP has an LACP system priority value. You can configure a value between 1 and 65535. LACP uses the system priority with the MAC address to form the system ID and also during negotiation with other systems.
When setting the priority, note that a higher number means a lower priority.
This example shows how to set the LACP system priority for the device to 2500:
switch(config)# lacp system-priority 2500
Command |
Description |
---|---|
show lacp |
Displays LACP information. |
To enable the debounce timer on an interface, use the link debounce command in the interface configuration mode. Use the no form of the command to set the link debounce timer to a default value of 100 milliseconds.
link debounce [link-up] [ time milliseconds ]
no link debounce [link-up] [ time milliseconds ]
link-up |
Configures the link-up debounce timer. |
time milliseconds |
(Optional) Specifies the extended debounce timer and debounce link-up time. The range is from 0 to 5000 milliseconds. A value of 0 milliseconds disables the debounce time. |
None
Interface configuration mode
Release |
Modification |
---|---|
7.1(4)N1(1) |
This command was modified. A new keyword, link-up was added to configure the debounce link-up time for an ethernet interface. |
5.2(1)N1(1) |
This command was introduced. |
Debounce time: The port debounce time is the amount of time that an interface waits to notify the supervisor of a link going down. During this time, the interface waits to see if the link comes back up. The wait period is a time when traffic is stopped.
![]() Caution | When you enable the debounce timer, link up and link down detections are delayed, resulting in a loss of traffic during the debounce period. This situation might affect the convergence of some protocols. |
![]() Note | To disable the link debounce time configure the link debounce time to 0. |
Link debounce link-up time: The port is considered as UP if the link is stable for the configured link-up delay time. The wait period is a time when traffic is stopped
This example shows how to configure debounce timer of 1000 milliseconds for an ethernet interface:
switch# configure terminal switch(config)# interface ethernet 1/1 switch(config-if)# link debounce time 1000This example shows how to disable debounce time for an ethernet interface:
switch# configure terminal switch(config)# interface ethernet 1/1 switch(config-if)# link debounce time 0
This example shows how to configure debounce link-up time of 100 milliseconds for an ethernet interface:
switch# configure terminal switch(config)# interface ethernet 1/1 switch(config-if)# link debounce link-up time 100
This example shows how to disable debounce link-up for an Ethernet interface:
switch(config-if)# no link debounce link-up
Command |
Description |
---|---|
show running-config interface ethernet x/y |
Displays the interface configuration information. |
To change the sampling interval for statistics collections on interfaces, use the load-interval command. To return to the default sampling interval, use the no form of this command.
load-interval [ counter { 1 | 2 | 3 } ] seconds
no load-interval [ counter { 1 | 2 | 3 } ] [seconds]
1 | 2 | 3 |
Specifies the number of counters configured on the interface. |
seconds |
Specifies the interval between sampling statistics on the interface. The range is from 60 to 300 seconds for VLAN network interfaces, and the range is from 30 to 300 seconds for Ethernet and port-channel interfaces. |
1—30 seconds; 60 seconds for VLAN network interface
2—300 seconds
3—not configured
Interface configuration mode
Release |
Modification |
---|---|
5.2(1)N1(1) |
This command was introduced. |
Use the load-interval command to obtain bit-rate and packet-rate statistics for three different durations.
You can set the statistics collection intervals on the following types of interfaces:
You cannot use this command on the management interface or subinterfaces.
This command sets the sampling interval for such statistics as packet rate and bit rate on the specified interface.
This command does not require a license.
This example shows how to set the three sample intervals for the Ethernet port 3/1:
switch# configure terminal switch(config)# interface ethernet 3/1 switch(config-if)# load-interval counter 1 60 switch(config-if)# load-interval counter 2 135 switch(config-if)# load-interval counter 3 225
Command |
Description |
---|---|
show interface |
Displays information about the interface. |