Configuring Lacp Fast Rate Timer - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 27 Configuring EtherChannel and Link State Tracking

Configuring LACP Fast Rate Timer

You can change the LACP timer rate to modify the duration of the LACP timeout. Use the lacp rate
command to set the rate at which LACP control packets are received by an LACP-supported interface.
You can change the timeout rate from the default rate (30 seconds) to the fast rate (1 second). This
command is supported only on LACP-enabled interfaces.
Command
Step 4
Switch# configure terminal
Step 5
Switch(config)# interface {fastethernet |
gigabitethernet | tengigabitethernet} slot/port
Step 6
Switch(config-if)# lacp rate {normal | fast}
This example shows how to configure the LACP rate:
Switch# configure terminal
Switch(config)# interface gigabitEthernet 2/1
Switch(config-if)# lacp rate fast
Switch(config-if)# exit
The show lacp internal command displays similar output:
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode
Channel group 25
LACP port Admin Oper Port Port
Port Flags State Priority Key Key Number State
Te1/49 FA bndl 32768 0x19 0x19 0x32 0x3F
Te1/50 FA bndl 32768 0x19 0x19 0x33 0x3F
Te1/51 FA bndl 32768 0x19 0x19 0x34 0x3F
Te1/52 FA bndl 32768 0x19 0x19 0x35 0x3F
The show lacp counters command displays similar output
Switch# show lacp counters
LACPDUs Marker Marker Response LACPDUs
Port Sent Recv Sent Recv Sent Recv Pkts Err
---------------------------------------------------------------------
Channel group: 24
Te1/1/27 2 2 0 0 0 0 0
Te2/1/25 2 2 0 0 0 0 0
Configuring Auto-LAG Globally
By default, auto-LAG is enabled globally, on your device.
Note
To configure auto-LAG globally, perform this task:
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Purpose
Enters configuration mode.
Selects the interface to configure.
Configures the rate at which LACP control packets are
received by an LACP-supported interface.
To reset the timeout rate to its default, use the no lacp
rate command.
Configuring EtherChannel
27-17