how can i configure etherchannel on a switch

raulibm · ‎09-21-2008

Giuseppe Larosa · ‎09-21-2008

Hello Raul,

look at the following link:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_46_se/configuration/guide/swethchl.html#wpxref12539

this is for a C3750 IOS based switch.

the member links must have the same config about speed, duplex, access vlan (if access port) or native vlan and list of permitted vlans (if a L2 trunk link)

A L3 etherchannel can be configured by configuring the logical interface port-channel X.

Very important for L2 trunks all changes in the list of permitted vlans has to be done on the logical port-channel X and not on the single member links otherwise some instabilities can occur.

Hope to help

Giuseppe

glen.grant · ‎09-21-2008

If you have ports of the same speed ,duplex etc it can be as simple as putting " channel-group X mode desirable or channel-group X mode active if you want to use LACP " on the ports you want to use .