asked on

error message while creating vlan on catalyst 2960 switch.

hello expert,

I encounter the following error message when trying
to create a valn on the caption switch

error message

4-Warning, ,Native VLAN mismatch discovered on GigabitEthernet0/23 (14), with OperatorRoom2 GigabitEthernet0/9 (1).,OperatorRoom2

Could any expert please assist in resolving above problem
Regards

Don Johnston

This isn't a VLAN creation problem. You've got a mismatched VLAN between this switch and the one connected to g0/23. Either change the VLAN membership on this switchport (g0/23) to VLAN 1 (or native VLAN if it's an 802.1q trunk) or change the other switchport to VLAN 14.

jomfra

ASKER

hello Donjohnston,

The two switch are connect via port 9 (switch 1) and via port 23 (switch 2) .

These two ports are use to connect the 802.1q trunk .
I am unsure if the two port should be
on the same vlan (either vlan 1 or vlan 14) ?

Could you provide a response.

Regards
Jomo

ASKER CERTIFIED SOLUTION

Don Johnston

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jjmartineziii

donjohnston is right.

There is a native vlan mismatch on the two sides of the trunk. Enter the command "switchport trunk native vlan <vlannumber>" and it should fix it. Do this on both sides. You can use any vlan you'd like. The purpose of this command is to tell the switch how to pass untagged traffic.

jomfra

ASKER

hello

Thanks for the help keep up the good work
Regards
Jomo

jomfra

ASKER

hello moderator ,

I am not getting the option to award points on the page.
Could some-one please assist.

Regards.