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IRB and channel groups help needed

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?

1 REPLY
Hall of Fame Super Silver

Re: IRB and channel groups help needed

Hello,

I would try something slightly different:

int vlan 99

no ip address

bridge-group 99

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

I'm not sure this can work but it is a likely setup

Hope to help

Giuseppe

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