when configuring a logical port channel on a switch, am I correct when say I just need to add the configuration to the port channel?
so for example g1/1 and g1/2 are attached to p1.
i can then do
int p1 switchport trunk allowed vlan add 123
to add that vlan to all physical interfaces on port chan 1?
Flamer.
Correct, the only thing to keep in mind is to put the channel-group 1 mode on on gi 1/1 and gi1/2 to create the portchannel. I have found that if you don't it sometimes gets flaky with pushing the configuration to the interfaces.
Sometimes if it doesn't push the cofiguration to the physical interfaces a shut no shut on the portchannel pushes it down.
So initially...
int gi 1/1 channel-group 1 mode on
int gi 1/2 channel-group 1 mode on
int po1 switchport trunk allowed vlan add 123
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