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Community Member

vtp password

Hi,

    I read vtp authentication is supported on vtp version3 only. But when I have version2 configured on all switches and if there is a password mismatch, why the updates are not getting propagated? Version2 should ignore the password,right?

Thanks,

Balajee

3 REPLIES
Purple

vtp password

Hi,

I read vtp authentication is supported on vtp version3 only

That's totally wrong. VTP authentication exists since VTP v1.

Regards

Alain

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Community Member

Re:vtp password

You need to check the MD5 digest output from show vtp status command. Even if you have the same vtp password in all of your switches but if the md5 digest hash is different then it would still not update vlan database.

You might need to remove and reapply vtp password, bounce trunk ports, or restart the switch.


Sent from Cisco Technical Support Android App

Cisco Employee

Re:vtp password

           VTP Password is supported on all the version.

Further more basic things to add:

1) Check the port and make sure it is trunk (show int trunk--- and see if the port is allowing the vlan and its not pruned)

2) Show vtp status(check the name,revision num)

3- Check the MD5 has value.

4- Troubleshooting issues on VTP:

http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613.shtml

HTH

Regards

Inayath

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