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BPDU Tunnel application environment
With BPDU Tunnel, Layer 2 protocol packets from user’s networks can be passed through
over the service provider network in the following work flow:
1. After receiving a Layer 2 protocol packet from network 1 of user A, PE 1 in the service
provider network encapsulates the packet, replaces its destination MAC address with a
specific multicast MAC address, and then forwards the packet in the service provider network.
2. The encapsulated Layer 2 protocol packet (called BPDU Tunnel packet) is forwarded to PE
2 at the other end of the service provider network, which de-encapsulates the packet, restores
the original destination MAC address of the packet, and then sends the packet to network 2 of
user A.
bpdu-tunnel configuration of edge switches PE1 and PE2 in the following:
PE1 configuration:
PE1(config)# bpdu-tunnel dmac 01-02-03-04-05-06
PE1(config-if-ethernet1/1)# bpdu-tunnel stp
PE1(config-if-ethernet1/1)# bpdu-tunnel lacp
PE1(config-if-ethernet1/1)# bpdu-tunnel uldp
PE1(config-if-ethernet1/1)# bpdu-tunnel gvrp
PE1(config-if-ethernet1/1)# bpdu-tunnel dot1x
PE2 configuration:
PE2(config)# bpdu-tunnel dmac 01-02-03-04-05-06
PE2(config-if-ethernet1/1)# bpdu-tunnel stp
PE2(config-if-ethernet1/1)# bpdu-tunnel lacp
PE2(config-if-ethernet1/1)# bpdu-tunnel uldp
PE2(config-if-ethernet1/1)# bpdu-tunnel gvrp
PE2(config-if-ethernet1/1)# bpdu-tunnel dot1x
15.4 bpdu-tunnel Troubleshooting
After port disables stp, gvrp, uldp, lacp and dot1x functions, it is able to configure bpdu-tunnel
function.
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