I've got a 8540 switch running 12.1(20)E set up with IRB and I've got two interfaces I'm looking at:
interface GigabitEthernet0/0/3 no ip address no ip redirects ! interface GigabitEthernet0/0/3.1 description Native VLAN encapsulation dot1Q 1 native no ip redirects ! interface GigabitEthernet0/0/3.99 encapsulation dot1Q 99 no ip redirects no cdp enable bridge-group 99
The other interface is Gigabit0/0/4 and is set up the exact same way. I'd like to be able to set up a channel group for those two interfaces. I set up the port channel like:
interface Port-channel1 no ip address hold-queue 300 in ! interface Port-channel1.1 encapsulation dot1Q 1 native no ip redirects ! interface Port-channel1.99 encapsulation dot1Q 99 no ip redirects bridge-group 99
But if I apply it to one of the interfaces, I get an error: "Error: Interface has sub-interface configured". I can take the subinterfaces off temporarily and set up the channel-group, but it I try and re-add the subinterfaces, I can't do that. Is this something that is possible? If so, what am I missing?