Advanced Spanning Tree Protocol Features: Configuring and Troubleshooting Etherchannels

channel-protocol lacp/pagp

channel-group NUMBER (Must match at each end) mode on – No protocol used?

This will enable Etherchannel only with no specified protocol

Logical interfaces always appear at the top of a configuration

Use the interface range command to avoid having to do each port manually, be aware that if set 1 side with a delay, this can err disable ports locally as the other side has no configuration

Etherchannel Verification

show etherchannel ? (several options)

summary and detail are helpful commands

detail shows you how long a physical port has been in the bundle

show pagp/lacp neighbor – details neighbours in Etherchannel bundles

show etherchannel brief

Look out for vlan masking on physical interfaces, will impact the logical interface.

Ports in an Etherchannel can be source SPAN ports but NOT destination SPAN ports.


Author: drbabbers - my personal journey to ccie

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