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?


Steve Pfister
Technical Coordinator, 
The Office of Information Technology
Dayton Public Schools
115 S. Ludlow St. 
Dayton, OH 45402
 
Office (937) 542-3149
Cell (937) 673-6779
Direct Connect: 137*131747*8
Email spfis...@dps.k12.oh.us


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