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Strange VTP issue with vtp transparent


Hi

I found that the VTP server only sends the VTP packets over its SPT designated ports not through the root port.
I have 4 switches, a ring topology

SW1-(desg)———-(root)-SW2
|(root) | (desg)(blocking)
| |
|(desg) |(desg)
SW3-(desg)——–(root)—SW4

SW1 is VTP server
SW2 is VTP Transparent
SW3 is VTP Client , STP Root
SW4 is VTP Client
All are same VTP domain CISCO

When I create vlan 2 on SW1, it will not affect other switches. (SW2, SW3, SW4 still have original vlan database)
When I change the SW2 to VTP client, VTP propagates.
So this means that SW1 is not sending its VTP packets through the SPT root port.

Any comment will help.

Regards
Reza Toghraee

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