VTP version 3 sync issue

[alfredobosca]

I have configured VTP ve between 2 Cisco Switches for testing how works. The issue that I have detected is that not propagate de correct VTP status. After force CCIE1 switch to Primary Server the CCIE2 switch keeps on thinking that primary server is himself.

Attach the outputs.

CCIE1#show vtp status
VTP Version capable             : 1 to 3
VTP version running             : 3
VTP Domain Name                 : CCIE
VTP Pruning Mode                : Disabled
VTP Traps Generation            : Enabled
Device ID                       : 001c.b02f.8f00

Feature VLAN:
--------------
VTP Operating Mode                : Primary Server
Number of existing VLANs          : 13
Number of existing extended VLANs : 1
Configuration Revision            : 10
Primary ID                        : 001c.b02f.8f00
Primary Description               : CCIE1
MD5 digest                        : 0x6A 0x44 0x1A 0x41 0x9F 0xB3 0x6C 0xEF
                                    0xC5 0x41 0xB0 0x79 0x4B 0x71 0xE4 0x4B


Feature MST:
--------------
VTP Operating Mode                : Primary Server
Configuration Revision            : 2
Primary ID                        : 001c.b02f.8f00
Primary Description               : CCIE1
MD5 digest                        : 0xA9 0x74 0x92 0xD1 0x89 0x62 0xBC 0x52
                                    0x8A 0xAF 0x4E 0x78 0x49 0xFD 0xCA 0x8E

CCIE2#show vtp status
VTP Version capable             : 1 to 3
VTP version running             : 3
VTP Domain Name                 : CCIE
VTP Pruning Mode                : Disabled
VTP Traps Generation            : Enabled
Device ID                       : 0024.5124.3880

Feature VLAN:
--------------
VTP Operating Mode                : Client
Number of existing VLANs          : 12
Number of existing extended VLANs : 0
Configuration Revision            : 2
Primary ID                        : 0024.5124.3880  //Should be the CCIE1
Primary Description               : CCIE2
MD5 digest                        : 0xDB 0x5C 0xD2 0xA5 0x68 0xC3 0x14 0xC2
                                    0xCA 0xBC 0x1A 0x6F 0x23 0x83 0x06 0xAC


Feature MST:
--------------
VTP Operating Mode                : Client
Configuration Revision            : 0
Primary ID                        : 0000.0000.0000 //Should be the CCIE1
Primary Description               :
MD5 digest                        : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
                                    0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00


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

At finally I thought that issue with Sync VTP between 2 switches was the version of each switch because is different
    - CCIE1  WS-C3750G-24T      12.2(55)SE
    - CCIE2  WS-C3560-24TS    12.2(55)SE11

Best regards,

[Georg Pauwen]

Hello,

try and change the client switch to transparent and then back to client...

[alfredobosca]

Hi,

I tried before but didn't work.

Best regards,

[Julio E. Moisa]

Hi

You can follow these steps:

- Verify domain
- Verify passwords
- Verify version 3 configured on the clients
- Verify the trunk interfaces

On the sever configure

vtp mode server
switch# vtp primary force
switch# vtp primary vlan force

Also you can create a new vlan wait few seconds and remove it.

Hope it is useful

:-)

[abdelmoutalib taif]

hi,

can you send me result of your configuration "running-config" ?

[Predrag Jovic · Accepted solution]

Your MD5 digest does not match, but should match. Most likely you have different passwords configured on switches.

Try to issue (maybe password is visible, or just overwrite it):

show vtp password

After that, make vtp server primary, add new vlan, exit vlan config mode and check result.