vtp version log.

[Manish Manwal]

hi all, i am receiving below log in my cisco 2960-i switch. can someone explain what it is and how to stop it.

Jan  2 11:49:15.384: %SW_VLAN-4-VTP_USER_NOTIFICATION: VTP protocol user notification: Version 1 device detected on Gi1/0/28 after grace period has ended

[Georg Pauwen]

Hello,

what do you have connected on Gi1/0/28 ? Quite literally the message would mean that there is something connected on Gi1/0/28 that runs a different VTP version...

[Manish Manwal]

sh vtp status in switch where log appear .

DSW1.PLANT3#sh vtp st
DSW1.PLANT3#sh vtp status
VTP Version capable             : 1 to 3
VTP version running             : 2
VTP Domain Name                 : akums.in
VTP Pruning Mode                : Disabled
VTP Traps Generation            : Enabled
Device ID                       : 247e.1271.e080
Configuration last modified by 10.10.20.1 at 12-27-18 08:52:23
Local updater ID is 10.10.10.12 on interface Vl52 (lowest numbered VLAN interface found)

Feature VLAN:
--------------
VTP Operating Mode                : Server
Maximum VLANs supported locally   : 1005
Number of existing VLANs          : 13
Configuration Revision            : 27
MD5 digest                        : 0x2A 0x65 0xB1 0x49 0xD8 0x56 0x98 0x1A
                                    0x3E 0x6C 0xA4 0xFE 0xB0 0x7B 0xD2 0x7C
DSW1.PLANT3#

second end switch , connected to gi1/0/28 vtp status

CSW1.PLANT1#sh vtp status
VTP Version capable             : 1 to 3
VTP version running             : 2
VTP Domain Name                 : akums.in
VTP Pruning Mode                : Disabled
VTP Traps Generation            : Disabled
Device ID                       : f8b7.e262.0100
Configuration last modified by 10.10.20.1 at 12-27-18 08:52:23
Local updater ID is 10.10.20.1 on interface Vl1 (lowest numbered VLAN interface found)

Feature VLAN:
--------------
VTP Operating Mode                : Server
Maximum VLANs supported locally   : 1005
Number of existing VLANs          : 13
Configuration Revision            : 27
MD5 digest                        : 0x2A 0x65 0xB1 0x49 0xD8 0x56 0x98 0x1A
                                    0x3E 0x6C 0xA4 0xFE 0xB0 0x7B 0xD2 0x7C
CSW1.PLANT1#

[Georg Pauwen]

Hello,

try and set the CSW1.PLANT1 switch to VTP transparent mode and then back to server mode, that will reset the revision number.

[Manish Manwal]

i did it , but still receiving same logs. and revision number also still same.

[paul driver]

Hello

Looks like these database are no sync correctly, Make sure the switches are connected via trunk port and if possible delete the vlan.dat file of one of the switches (delete flash:vlan.dat) and reload and then reapply the vtp config on that switch then vtp should synchronize.

[jalejand]

Hi Manish

There may be two reasons:
1. The neighbor switch connected in Gi1/0/28 (You can confirm its name an management IP address with the show cdp nei gi1/0/28 detail command) it is in fact, running VTP version 1. Switches run VTP v2 by default.

2. The neighbor switch connected in Gi1/0/28 is not synchronized in VTP (this means, a different MD5 hash between VTP switches) for a variety of reasons:
* Different domain names
* Different password names
* Different VTP version configured
* Both configured as server, same revision number but different vlan database.

Please attach a "show vtp status" of both switches in order to identify any of these causes.

[Manish Manwal]

sh vtp status in switch where log appear .

DSW1.PLANT3#sh vtp st
DSW1.PLANT3#sh vtp status
VTP Version capable : 1 to 3
VTP version running : 2
VTP Domain Name : akums.in
VTP Pruning Mode : Disabled
VTP Traps Generation : Enabled
Device ID : 247e.1271.e080
Configuration last modified by 10.10.20.1 at 12-27-18 08:52:23
Local updater ID is 10.10.10.12 on interface Vl52 (lowest numbered VLAN interface found)

Feature VLAN:
--------------
VTP Operating Mode : Server
Maximum VLANs supported locally : 1005
Number of existing VLANs : 13
Configuration Revision : 27
MD5 digest : 0x2A 0x65 0xB1 0x49 0xD8 0x56 0x98 0x1A
0x3E 0x6C 0xA4 0xFE 0xB0 0x7B 0xD2 0x7C
DSW1.PLANT3#





second end switch , connected to gi1/0/28 vtp status

CSW1.PLANT1#sh vtp status
VTP Version capable : 1 to 3
VTP version running : 2
VTP Domain Name : akums.in
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : f8b7.e262.0100
Configuration last modified by 10.10.20.1 at 12-27-18 08:52:23
Local updater ID is 10.10.20.1 on interface Vl1 (lowest numbered VLAN interface found)

Feature VLAN:
--------------
VTP Operating Mode : Server
Maximum VLANs supported locally : 1005
Number of existing VLANs : 13
Configuration Revision : 27
MD5 digest : 0x2A 0x65 0xB1 0x49 0xD8 0x56 0x98 0x1A
0x3E 0x6C 0xA4 0xFE 0xB0 0x7B 0xD2 0x7C
CSW1.PLANT1#
THANKS
MANISH MANWAL
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[jalejand]

Why are both VTP servers?
Try creating a new VLAN on the switch you want to be the server to update the revision number so it can update the peer switch