L2PT : STP BPDU Tunnel through a VTP Transparent Switch

From: Divin Mathew John (divinjohn@gmail.com)
Date: Wed Mar 25 2009 - 11:15:16 ART


My Setup is as follows

Switch 1 <------> Switch 2 <--------> Switch 3

Switch 1 Config
VTP Mode : Server
Vlans : 1,10,20,30,40
Trunk Ports to Switch 2 fa0/2 encap:dot1q
Vtp domain:cisco

Switch 2 Config
Vtp mode :transparent
vlans:1,100 200
Trunk Ports to Switch 1 fa0/1 to switch 3 fa0/3
vtp domain:cisco

Switch 3 config
Vtp Mode:Client
Vlans : 1,10,20,30,40
Trunk ports to Switch 2 fa0/2
vtp domain :cisco

now... All vlans are synchronized using VTP. but when running PVST+
the BPDU from Switch 1 doesnt transparently bridge thru switch 2 due
to non existence of vlans 10,20,30,40.

So to solve this how do i implement L2 protocol Tunneling using Q-in-Q
Tunneling.

Thanking You

Yours Sincerely

Divin Mathew John
divinjohn@gmail.com
divin@dide3d.com
+91 9945430983
+91 9846697191
+974 5008916
Sent from: Bangalore KA India.

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