VTP Not Propagating

Answered Question
Aug 30th, 2010
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Please erview attachment. We have a problem with VTP not propagating.  We have a 3550 which is acting as the VTP server in the domain fwnet4.
I've verified that the domain name is the same, VTP version is the same, mode is configured correctly, all connections from switch-switch are trunked using dot1q, but the vlans are not propagating. Why? Thanks in advance.

Correct Answer by Jon Marshall about 6 years 9 months ago

David


Your configuration revision number is 0 on all switches. Please either add or modify an existing vlan on the 3550. This should then update the configuration revision number to 1 and force the VTP clients to update their vlan databases.


Jon

Correct Answer by Jerry Ye about 6 years 9 months ago

The MD5 digest on your 4506 is not the same, do you have VTP password configured? If no, you can try to change the VTP domain name to a dummy one and change it back to see if VTP propagate or not. Also, you can also try to add and remove a dummy VLAN also.


HTH,

jerry

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Correct Answer
Jerry Ye Mon, 08/30/2010 - 09:30
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The MD5 digest on your 4506 is not the same, do you have VTP password configured? If no, you can try to change the VTP domain name to a dummy one and change it back to see if VTP propagate or not. Also, you can also try to add and remove a dummy VLAN also.


HTH,

jerry

davidhuynh5 Mon, 08/30/2010 - 09:44
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There are no vtp passwords and I've change vtp domain name, then back again with no luck.

Rajiv Dasmohapatra Mon, 08/30/2010 - 09:58
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Can you check your trunk configuration between the switches. Are all the vlans passed through or are there some disallowed vlans? check if Vlan1 is passed through.



BR//Rajiv

davidhuynh5 Mon, 08/30/2010 - 10:05
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Show interface trunk shows vlan 1-4094 allowed. My last option is to reboot the switch, which I don't want to do since it's in production.

Correct Answer
Jon Marshall Mon, 08/30/2010 - 10:48
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David


Your configuration revision number is 0 on all switches. Please either add or modify an existing vlan on the 3550. This should then update the configuration revision number to 1 and force the VTP clients to update their vlan databases.


Jon

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