Some feature in channel in switch

[interfacedy]

Folks

Two physical interface are configured as channel. Sometime we need to add feature like trunk, vlan allow, or native vlan etc. Do we need to add these features at both levels or at physical level or channel level? Is there a rule about it? Usually I add them at both levels. and sometime only one level is available. How do you think about it? Thank you

[balaji.bandi]

Once the channel is bundled, you only change the config on interface port-channel X  ( you do not change any config on each physical interface and that is not allowed, this leads to a nonfunctioning state that may have link fail also).

[Joseph W. Doherty]

What "needs" to be configure where (for Etherchannel) depends on the device.

Generally, newer/later Cisco devices support more configuration setting at the port-channel interface (i.e. automatically pushed to member physical interfaces, when needed) then they did years ago.  So, I try doing all expected interface configuration at the port-channel interface, first.

[interfacedy]

Thanks for your reply! Sometime we have to configure feature on physical interface first becasue some feature cannot be configured at port-channal. If we configure a lot features at physical interfaces first and then create port channel, do the origial feature added at the physical interface would be impacted? In other word, all features are only added on physical interface, while no any features added at port-channel, can this work well?