[c-nsp] 3560E Migrating from a single uplink to a port-channel on a trunk port with several VLANs

[Drew Weaver]

Hello,

Have an old C3560E that is uplinked to another switch using a single 10G interface.

The existing uplink interface is a trunk port and it carries 40 VLANs.

I want to migrate it to use a port channel while avoiding downtime.

Plan right now is to create the port-channel interface on both ends, duplicate the configuration from the existing interface and then plug in the 2nd cable.

I expect that spanning tree will block the port-channel and nothing bad will happen.

Then I will shut down the existing port which should change the port-channel from blocking to forwarding at this point I can just add the original interface to the port-channel.

I've been successful doing things like this on various cisco platforms over the years but never specifically with a 3560e.

Any order of operations sort of things to look out for in a scenario such as this?