Руководство По Проектированию для Cisco Cisco Nexus 5010 Switch
© 2015 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 40 of 119
Figure 13. Bridge Assurance Should Not Be Used with vPC
LACP
LACP is particularly useful in vPC deployments: for example, when configuring a double-sided vPC. Complex vPC
configurations are prone to human error, and LACP helps achieve two goals:
●
Make the topology converge into a usable topology (even in the presence of an erroneous configuration).
●
Locate the problem.
For example, assume a configuration in which you have configured ports 2/9-10 on Cisco Nexus 7000 Series
Switch 1 (nexus7k01) and 2/9-10 on Cisco Nexus 7000 Series Switch 2 (nexus7k02) as part of vPC 51. Now
assume that on the Cisco Nexus 5000 Series Switches, you configure the vPC domain, peer link, etc., and then
you configure PortChannel 51 on ports 2/1-2 on Cisco Nexus 5000 Series Switch 1 (nexus5k01) and 2/1-2 on
Cisco Nexus 5000 Series Switch 2 (nexus5k02), but you forget to include vPC 51 in the PortChannel configuration.
On nexus5k01, you will see the following (everything is normal):
tc-nexus5k01# show port-channel summary
Flags: D - Down P - Up in port-channel (members)
I - Individual H - Hot-standby (LACP only)
s - Suspended r - Module-removed
S - Switched R - Routed
U - Up (port-channel)
--------------------------------------------------------------------------------
Group Port- Type Protocol Member Ports
Channel
--------------------------------------------------------------------------------
51 Po51(SU) Eth LACP Eth2/1(P) Eth2/2(P)