API Guide

to check whether the partner link is alive or not. The links are ungrouped if three consecutive LACP PDUs are missed. The
timeout value depends on the configured rate interval. If the rate interval is fast, then LACP PDUs are sent once every second.
If the rate interval is normal, then the LACP PDUs are sent once every 30 seconds.
By default, the LACP rate is normal (long timeout). If you configure a fast LACP rate, a short timeout sets.
● Set the LACP rate in CONFIGURATION mode.
lacp rate [fast | normal]
Configure LACP timeout
OS10(conf-if-eth1/1/29)# lacp rate fast
View port status
OS10# show lacp port-channel
Port-channel 41 admin up, oper up, mode lacp
Actor System ID: Priority 32768, Address e4:f0:04:fe:9f:e1
Partner System ID: Priority 4096, Address de:11:de:11:de:11
Actor Admin Key 41, Oper Key 41, Partner Oper Key 41
Fallback: Not configured, Fallback port preemption: Configured, Fallback timeout: 15
seconds
Fallback Port Elected:
LACP LAG ID 41 is an aggregatable link
A - Active LACP, B - Passive LACP, C - Short Timeout, D - Long Timeout
E - Aggregatable Link, F - Individual Link, G - IN_SYNC, H - OUT_OF_SYNC,
I - Collection enabled, J - Collection disabled, K - Distribution enabled,
L - Distribution disabled, M - Partner Defaulted, N - Partner Non-defaulted,
O - Receiver is in expired state, P - Receiver is not in expired state
Port ethernet1/1/14 is Enabled, LACP is enabled and mode is lacp
Actor Admin: State BCFHJKNO Key 20 Priority 32768
Oper: State BDEGIKNO Key 20 Priority 32768
Partner Admin: State BCEGIKNP Key 0 Priority 0
Oper: State BDEGIKNO Key 10 Priority 32768
Port ethernet1/1/16 is Enabled, LACP is enabled and mode is lacp
Actor Admin: State BCFHJKNO Key 20 Priority 32768
Oper: State BDEGIKNO Key 20 Priority 32768
Partner Admin: State BCEGIKNP Key 0 Priority 0
Oper: State BDEGIKNO Key 10 Priority 32768
Sample configuration
This sample topology is based on two routers—Alpha and Bravo.
Alpha LAG configuration summary
OS10(config)# interface port-channel 1
OS10(conf-if-po-1)# exit
OS10(config)# interface ethernet 1/1/29
OS10(conf-if-eth1/1/29)# no switchport
OS10(conf-if-eth1/1/29)# channel-group 1 mode active
OS10(conf-if-eth1/1/29)# interface ethernet 1/1/30
OS10(conf-if-eth1/1/30)# no switchport
Layer 2
419