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BPDU Tunneling for PVST Configuration Example
Network requirements
As shown in Figure 1-4:
z CE 1 and CE 2 are edges devices on the geographically dispersed network of User A; PE 1 and PE
2 are edge devices on the service provider network.
z All ports used to connect devices in the service provider network are trunk ports and allow packets
of any VLAN to pass through.
z PVST is enabled for VLANs 1 through 4094 on User A’s network. It is required that, after the
configuration, CE 1 and CE 2 implement consistent PVST calculation across the service provider
network, and that the destination multicast MAC address carried in BPDUs be
0x0100-0CCD-CDD0.
Figure 1-4 Network diagram for configuring BPDU tunneling for PVST
Configuration procedure
1) Configuration on PE 1
# Configure the destination multicast MAC address for BPDUs as 0x0100-0CCD-CDD0.
<PE1> system-view
[PE1] bpdu-tunnel tunnel-dmac 0100-0ccd-cdd0
# Configure GigabitEthernet 1/0/1 as a trunk port and assign it to all VLANs.
[PE1] interface gigabitethernet 1/0/1
[PE1-GigabitEthernet1/0/1] port link-type trunk
[PE1-GigabitEthernet1/0/1] port trunk permit vlan all
# Disable STP on GigabitEthernet 1/0/1, and then enable BPDU tunneling for STP and PVST on it.
[PE1-GigabitEthernet1/0/1] undo stp enable
[PE1-GigabitEthernet1/0/1] bpdu-tunnel dot1q stp
[PE1-GigabitEthernet1/0/1] bpdu-tunnel dot1q pvst
2) Configuration on PE 2
# Configure the destination multicast MAC address for BPDUs as 0x0100-0CCD-CDD0.
<PE2> system-view
[PE2] bpdu-tunnel tunnel-dmac 0100-0ccd-cdd0
# Configure GigabitEthernet 1/0/2 as a trunk port and assign it to all VLANs.
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