VLAN Spanning tree issue

[vyl-coyot]

Hello,

I have issues with my VLAN 200 on 1 of my 2 switch, they are configured as client VTP and get the same VLAN from my Backbone switch. These two switch has almost same configuration (swihv33 has just more VLAN allowed than swihv31).

So i have extract some configuration and made a schema of the topology (photo below).

On my switch swihv33 the vlan 200 works fine and i can get an IP from my DHCP for example but i get nothing on my switch swihv31. The only thing that i noticed in spanning-tree configuration that is one (swihv31) is with Desg role on the interface Po1 and the other one (swihv33) is with Root role on interface Po1 :

Any idea, why it works on 1 and not on the other ? 

Regards

[MHM Cisco World]

it not clear what is not work for you, can you mode elaborate 

MHM

[vyl-coyot]

Hi, 

Thanks for answering, actually for example i don't get any IP from DHCP on the vlan 200 on the switch swihv31 but i get one correctly on the switch swihv33. They have same configuration and they discover vlan 200 correctly from the VTP Server.

[balaji.bandi]

Post VTP information from all the switches, looks like some VTP sync version mismatch or database not syncing ?

Do you have any config related to VLAN 200 on local switch like any priority setup that to become as root bridge ?

what  IOS XE code running, i am guessing all should be same IOS XE code and same VTP Version, 

[vyl-coyot]

Hi, 

Thanks for answering, there is information about VTP and IOS version :

SWIHV31 VTP :

SWIHV31 IOS :

SWIHV33 VTP :

SWIHV33 IOS :

SWIBAK1 VTP :

SWIBAK1 IOS :

SWIHV31 Spanning tree : 

SWIHV33 Spanning tree : 

Thanks for your time and your help.

Regards.

[balaji.bandi]

Can you post show out from the VTP Server (that is may be your core)

also try for testing spanning tree priority on core for vlan 200 Lower value (Looks like you are using default)

show run | in spann (post output from all the devices - Core and other switches)

[vyl-coyot]

Hello, 

There is VTP info from my switch core (swibak1) which VTP server :

And yesterday i noticed that my vlan 200 was pruned on my switch swihv31 :

So i launched the command switchport trunk pruning vlan remove 200 on my interface Po1 on swihv31. My vlan 200 is no more pruned but it still doesn't passthroug the trunk.

I tried to changed the priority of my vlan 200 on my interface Po1 but nothing change :

There is the result of the command show run | in spann for the 3 switches :

Regards

[balaji.bandi]

I was suggesting the priority to be done on the CORE switch not on the access ( where the VTP server running ?)

can you post below command from all the switches :

show spanning-tree summary

show spanning-tree inconsistentports

show version

show spanning-tree root priority

[MHM Cisco World]

I will check this issue today

MHM