port channel line protocol is down

[jon-macdonald]

HI All

Thanks for any and all help.

I have a port channel that works fine when set as follows on a Catalyst 3750 Stack.

interface Port-channel9
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 2001
 switchport mode trunk
 switchport nonegotiate

Please note it is connected to a VMware host distributed switch.

When I change the switchport trunk native vlan  to 2010 the port channel will not come back up, and gives me the "port channel line protocol is down".

The changed config is as follows:

interface Port-channel9
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 2010
 switchport mode trunk
 switchport nonegotiate

I have also tried adding the allowed vlan's. No change.

I have also verified that all of the ports associated with the group are configured identically as follows:

interface GigabitEthernet2/0/24
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 2010
 switchport mode trunk
 switchport nonegotiate
 channel-group 9 mode active

If the native vlan is switched back, the group immediately comes back up.

Any and all help appreciated.

Jon

[Jon Marshall]

Did you change the native vlan on the other end of the link ?

Jon

[jon-macdonald]

Hi Jon

Thanks for the quick response.

We are reviewing all of the VMware distributed switch setup.  I suspect that the issue is there, as the rest of the coding looks to be correct.

Thanks again for your help, and I will followup with the solution when found.

Jon