Cisco Nexus 3064 Fibre Switch - VTP forwarding Issue

[Jay.Gough]

Hi All,

I'm losing my mind with this one.

I've set up VTP loads of times in the past and it has worked perfectly but for some reason this damned Nexus switch wont forward VTP even though its in transparent mode...

I have checked and double checked the VTP domain, version, and password and they all match.

VTP Status Information
----------------------
VTP Version : 2 (capable)
Configuration Revision : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs : 10
VTP Operating Mode : Transparent
VTP Domain Name : HQ
VTP Pruning Mode : Disabled (Operationally Disabled)
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 Digest : 0xF8 0x93 0xD3 0x88 0x0A 0x1D 0x8B 0xAA
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
VTP version running : 1

I have also tried version 2 to no avail. All switches directly connected to eachother work if i set one as a vtp domain and a couple of clients for testing purposes in their respective areas. But when i add other switches as clients which are trunked through the nexus they dont pick up the vtp. All switches have IP addresses and can ping eachother no problem from anywhere in the building. Its just VTP that doesnt want to play.

The nexus switches are acting as our core switches with the relevant work spaces trunked through them with fibre optic cables.

Is there a command I am missing to allow the nexus to just be passive and allow the vtp information through from the switch in our main cab that i have set up as the server?

Im losing my mind.

Thanks

Jay

[balaji.bandi · Accepted solution]

As per the description you have below setup :

Switch (VTP Server) ---Nexus(Transparent) -- Switch (VTP Client)

VLAN 1 is required on all trunk ports used for switch interconnects if VTP is supported in the network. Disabling VLAN 1 from any of these ports prevents VTP from functioning properly.

[Jay.Gough]

@bb

Thanks for the reply so fast.

You will have to excuse my stupidity on this one.

Does this mean on all trunk ports i need to change from:

switchport trunk allowed vlan 10,20,30,40,50,60,70,80,90

to:

switchport trunk allowed vlan 1,10,20,30,40,50,60,70,80,90

Or is there more to it?

Thanks

[balaji.bandi · Accepted solution]

have you change native VLAN from 1 to any , then switchport trunk allowed vlan 1,10,20,30,40,50,60,70,80,90 - this should work 

this need to both the sides of Trunk (one going to VTP Server-side) one going to VTP client side

[Jay.Gough]

It works. Thanks you