As part of my studies for the bcmsn exam, I have been trying to configure etherchannel on a 3550 EMI switch and keep recieving the following message:
command rejected (port channel1 gi/01 ): either port is L2 and port channel is L3 or vice-versa. I have followed the config examples from the Cisco self study book and have tried switchport, no switchport commands and still keep recieving the same message. Has anyone out there experianced the same problem? Any ideas?
Many thanks for your reply.I will try your suggestion tomorrow since England are playing in the world cup tonight! The problem I was having was in regard to the creation of a Etherchannel trunk. Perhaps there is a typo in the BCMSN 3rd edtion book?
I have tried what you suggested without any luck. I am using a 3550 in a remote lab which is the only switch in the lab. Is it poss that I am recieving error messages because the interface is not connected?
No, it does not have to be connected for the config to be entered and there should not be any error messages. You will get "down, down" on the port-channel, as the interfaces that you have nominated to be in the group will be down and therefore the switch will not put them in the channel-group. As and when they come up if you do a "sh int po 1" you should see the bandwidth increase to the total size of the links in the group.
With you haveing an error saying somthing about a layer 2 and layer 3 mismatch, it would conclude that there is a typo in the config.
The physical ports can either be layer 2 "switchport mode...." or layer 3 "no switchport, ip address...." These have to be the same on all ports involved - if the switchports are layer 3 (no switchport, etc) then the port-channel can't be a trunk.
Try configuring the ports using "channel-group 30 mode on" without doing and config on the port channel and see what happens. Failing that - post the config and we'll sort it ;)
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