12-17-2014 01:01 PM - edited 03-07-2019 09:56 PM
All,
I configured vtp version on a switch incorrectly. I changed it to VTP Ver 2, and then changed it back to VTP Ver 1.
When I do a sho vtp status:
It still shows me VTP version 2.
Why is this? Is there any way for me to change this back to Ver 1?
Thanks all!
12-17-2014 03:20 PM
HI,
VTP Version
Follow these guidelines when deciding which VTP version to implement:
•All switches in a VTP domain must run the same VTP version.
•A VTP version 2-capable switch can operate in the same VTP domain as a switch running VTP version 1 if version 2 is disabled on the version 2-capable switch (version 2 is disabled by default).
•Do not enable VTP version 2 on a switch unless all of the switches in the same VTP domain are version-2-capable. When you enable version 2 on a switch, all of the version-2-capable switches in the domain enable version 2. If there is a version 1-only switch, it does not exchange VTP information with switches with version 2 enabled.
•If there are TrBRF and TrCRF Token Ring networks in your environment, you must enable VTP version 2 for Token Ring VLAN switching to function properly. To run Token Ring and Token Ring-Net, disable VTP version 2.
Also have a look athis paper:-
http://www.cisco.com/c/en/us/support/docs/lan-switching/vtp/98155-tshoot-vlan.html
Regards
Alex
12-17-2014 04:13 PM
Thanks Alex.
So basically the answer is no, I cannot change it back to VTP ver 1. All the other switches are set to VTP ver 1, which is why I wanted to change it back.
I think if I understand your post, I cannot change it back to VTP ver 1.
Is this correct?
12-18-2014 08:48 AM
If it is possible can you totally default the switch
3750#erase startup-config
3750#delete vlan.dat
3750#reload
Then apply your config again.
make sure you just use the mode you require e.g.
!
vtp mode client
!
vtp domain YOUR-DOMAIN-NAME
!
One your up and running again you can check the VTP status with
3750#show vtp status
Regards
Alex
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