VTP client issue

[Manos]

Hello all,

I am having a problem with a Cisco client switch ((C2950-I6Q4L2-M), Version 12.1(14)EA1a) that cannot receive updates from VTP server (WS-C3850-24XS). 

You can see below both "show VTP status" commands:

Server Switch

VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : HM_AES
VTP Pruning Mode : Disabled
VTP Traps Generation : Enabled
Device ID : 2852.6107.7880

Feature VLAN:
--------------
VTP Operating Mode : Primary Server
Number of existing VLANs : 31
Number of existing extended VLANs : 0
Maximum VLANs supported locally : 4096
Configuration Revision : 19
Primary ID : 2852.6107.7880
Primary Description : HM-AES-CoreFC
MD5 digest : 0x6C 0x75 0x97 0x71 0x83 0x06 0x3D 0x83
0x70 0x9F 0x2A 0xC8 0xE9 0x2E 0xCE 0xEF
Feature MST:
--------------
VTP Operating Mode : Transparent
Feature UNKNOWN:
--------------
VTP Operating Mode : Transparent

Client Switch

VTP Version : 2
Configuration Revision : 0
Maximum VLANs supported locally : 250
Number of existing VLANs : 23
VTP Operating Mode : Client
VTP Domain Name : HM_AES
VTP Pruning Mode : Enabled
VTP V2 Mode : Disabled
VTP Traps Generation : Enabled
MD5 digest : 0xDB 0x03 0xA6 0xF6 0x87 0x84 0xE3 0xED
Configuration last modified by 10.101.101.2 at 1-16-17 10:39:29

VTP Password and domain are the same. Any ideas regarding the problem?

Thanks in advance!

[chrihussey · Accepted solution]

The primary VTP switch is operating in transparent mode. If you want to have a server client model you need to change the VTP mode to server on the server switch.

Not familiar with the size of your network, but if you have multiple switches you may want to validate all before making the change.

Hope this helps