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VTP (v3) communications not working through trunk

First off, I can't believe that this isn't working after what seems like a lot of good information out there about setting this up. However perhaps I am just missing something stupid due to sitting and staring at my screen too long.

That said, I have a couple 3750 switches that I am trying to run VTP Version 3 on....one as primary and the other as "server" which implies secondary from my research.

Switch01 configuration -

Switch01#sh vtp stat
VTP Version capable             : 1 to 3
VTP version running             : 3
VTP Domain Name                 : domainname

VTP Pruning Mode                : Disabled
VTP Traps Generation            : Disabled
Device ID                       : 70ca.9ba2.4380

Feature VLAN:
--------------
VTP Operating Mode                : Primary Server
Number of existing VLANs          : 15
Number of existing extended VLANs : 0
Configuration Revision            : 20
Primary ID                        : 70ca.9ba2.4380
Primary Description               : Switch01
MD5 digest                        : 0xCB 0xC9 0xE3 0x9C 0x91 0x7C 0xB5 0x3D
                                    0x59 0xB2 0x02 0x7D 0xD7 0x3F 0x52 0x67


Feature MST:
--------------
VTP Operating Mode                : Transparent

Trunk port enabled on port Gi1/0/1  -

     interface GigabitEthernet1/0/1

      switchport trunk encapsulation dot1q

Switch01#sh int gi1/0/1

                    GigabitEthernet1/0/1 is up, line protocol is up (connected)

               

Port Status on switch01 -

                    Switch01#sh int gi1/0/1
                    GigabitEthernet1/0/1 is up, line protocol is up (connected)

VTP Counters on Switch01 -

                    VTP statistics:
                     Summary advertisements received    : 0
                     Subset advertisements received     : 0
                     Request advertisements received    : 0
                     Summary advertisements transmitted : 0
                     Subset advertisements transmitted  : 0
                     Request advertisements transmitted : 0
                     Number of config revision errors   : 0
                     Number of config digest errors     : 0
                     Number of V1 summary errors        : 0

So at this point, I thought everything looked good other than the fact that the counters indicate that no VTP communications are taking place.

Switch02 Configuration -

VTP Configuration -

Switch02#sh vtp stat
VTP Version capable             : 1 to 3
VTP version running             : 3
VTP Domain Name                 : domainname
VTP Pruning Mode                : Disabled
VTP Traps Generation            : Disabled
Device ID                       : 70ca.9b2d.8d00

Feature VLAN:
--------------
VTP Operating Mode                : Server
Number of existing VLANs          : 5
Number of existing extended VLANs : 0
Configuration Revision            : 0
Primary ID                        : 0000.0000.0000
Primary Description               :
MD5 digest                        : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
                                    0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00


Feature MST:
--------------
VTP Operating Mode                : Transparent


Feature UNKNOWN:
--------------
VTP Operating Mode                : Transparent

Trunk port enabled on port Gi1/01 -

                    interface GigabitEthernet1/0/1

                     switchport trunk encapsulation dot1q

Port status on switch -

Switch02#sh int gi1/0/1
GigabitEthernet1/0/1 is up, line protocol is up (connected)

VTP Counters -

VTP statistics:

Summary advertisements received    : 0

Subset advertisements received     : 0

Request advertisements received    : 0

Summary advertisements transmitted : 0

Subset advertisements transmitted  : 0

Request advertisements transmitted : 0

Number of config revision errors   : 0

Number of config digest errors     : 0

Number of V1 summary errors        : 0 VTP statistics:
Summary advertisements received    : 0
Subset advertisements received     : 0
Request advertisements received    : 0
Summary advertisements transmitted : 0
Subset advertisements transmitted  : 0
Request advertisements transmitted : 0
Number of config revision errors   : 0
Number of config digest errors     : 0
Number of V1 summary errors        : 0

Additionally, running a show VTP devices yields a "No VTP3 devices found" on both devices. Despite ensuring that the domainname and password match.

I have a patch cable from Gi1/0/1 on switch one runnning to Gi1/0/1 which from what I read is acceptable on GigE.

Does anyone with a clearer head than mine see anything wrong here or know of something to try?

Thanks,

james

1 ACCEPTED SOLUTION

Accepted Solutions

VTP (v3) communications not working through trunk

Great to troubleshoot things on its own.

Can you please mark this tread as close, so that other people don't waste their time coming and seeing this post as solved already.

Regards,

Smitesh

2 REPLIES
New Member

VTP (v3) communications not working through trunk

Nevermind...I figured it out. I stupidly forgot to put the ports in "switchport mode trunk". I knew as soon as I wrote a long arse forum thingy that I would find my mistake.

VTP (v3) communications not working through trunk

Great to troubleshoot things on its own.

Can you please mark this tread as close, so that other people don't waste their time coming and seeing this post as solved already.

Regards,

Smitesh

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