How do I change the Native VLAN on a Cisco Catalyst 2900

[Hitman]

I'm trying to build a network segment for a small group of users on a Cisco Catalyst 2924XL with IOS 12.0.  I have the Native VLAN on my core switch (Cisco Catalyst 4000) set to VLAN 200.  I have a port channel set up on the Cat 4000 with two ports that are also in VLAN200 and are setup as dot1Q trunk.

The problem is when I try to set this up on the Cat 2900, I get CDP errors that say there is a "native VLAN mismatch".  I can't see anywhere that there is a command to change the native VLAN on the catalyst 2900 - what am I missing?

Thanks,
John

[notoriousBG]

Hello, John!

You will need to add "switchport trunk native vlan <vlan>" at the interface level. Ive included an example below:

interface FastEthernet0/1
duplex full
 speed 100
 port group 1
 switchport access vlan 200
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 200
 switchport mode trunk
!
interface FastEthernet0/2
 duplex full
 speed 100
 port group 1
 switchport access vlan 200
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 200
 switchport mode trunk

Let me know if this does the trick - If you want, I can lab this up and shoot you a config example.

Regards,
-noto