Administrator Guide

22 Dell Campus Networking Interoperability with Cisco Catalyst 1.1 | version 1.1
2.5.2 Configuring LACP Standby — Cisco Catalyst
This section covers the configuration required on the Cisco 6504-E switch to enable LACP port standby. The
command lacp max-bundle 1 is issued to both LAGs to reduce participating ports from two to one. The
second Ethernet port participating in each of the two port channels have their LACP port-priority set to the
maximum of 65535 to ensure that these physical ports will be in standby. Finally, the show etherchannel
summary command is ran to verify active and standby port assignments. As shown below, the ports assigned
for standby are flagged with a capital H for Hot-standby.
C6504#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
C6504(config)#interface port-channel 5
C6504(config-if)#lacp max-bundle 1
C6504(config)#interface tenGigabitEthernet 2/2
C6504(config-if)#lacp port-priority 65535
C6504#(config)#interface port-channel 13
C6504(config-if)#lacp max-bundle 1
C6504(config)#interface tenGigabitEthernet 2/4
C6504(config-if)#lacp port-priority 65535
C6504(config-if)#end
C6504#show etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s – suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use N - not in use, no aggregation
f - failed to allocate aggregator
M - not in use, no aggregation due to minimum links not met
m - not in use, port not aggregated due to minimum links not met
u - unsuitable for bundling
d - default port
w - waiting to be aggregated
Number of channel-groups in use: 2
Number of aggregators: 2
Group Port-channel Protocol Ports
------+-------------+-----------+-------------------------------------------
5 Po5(SU) LACP Te2/1(P) Te2/2(H)
13 Po13(SU) LACP Te2/3(P) Te2/4(H)