Strange vlan configuration problem. Please assist.
We created a new IC to our building that I installed two 2950_48 that are stacked together. Off from one of the 2950 is a fiber that runs back to a 3548XL switch for our trunk connection. I configured trunk on both ends and set vlan 2 as our native vlan. However when I look at interface vlan 2 on the 2950_48 it is showing Vlan up and line protocol down. Now here comes the strange part- on the 2950_48, I able to configure each port for different vlan that we have in our infrastructure but only one vlan can be carried over the trunk. None of the other vlan seems to be working at all. The traffic of the working vlan has no problem at all with network communication. The other thing is that I can't get to my 2950s switch for management from telnet or SSH only console works. Obviously because my VLAN 2 is down. Please assist. Thanks.
Hello,
looking at your configurations, I think you need to add the native VLAN statement to the trunk ports on your 3548:
interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 2
switchport trunk pruning vlan none
switchport mode trunk
interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport trunk native vlan 2
switchport trunk pruning vlan none
switchport mode trunk
If that does not help, can you post the output of ´show vtp status´ of both switches ? When you look at the output, make sure that the VTP version, domain name (case-sensitive) and password match.
Regards,
GP
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- - - Snipp - - -
Significance of Native VLAN
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