3Com S7906E Command Reference Manual page 263

<Sysname> system-view
[Sysname] port-group manual 1
[Sysname-port-group-manual-1] group-member GigabitEthernet 2/0/1 to gigabitethernet 2/0/6
[Sysname-port-group-manual-1] stp disable
[Sysname-port-group-manual-1] bpdu-tunnel dot1q stp
bpdu-tunnel tunnel-dmac
Syntax
bpdu-tunnel tunnel-dmac mac-address
undo bpdu-tunnel tunnel-dmac
View
System view
Default Level
2: System level
Parameters
mac-address: Destination multicast MAC address for BPDU tunnel frames, in the format of H-H-H. The
allowed values are 0100-0CCD-CDD0, 0100-0CCD-CDD1, 0100-0CCD-CDD2, and 010F-E200-0003.
Description
Use the bpdu-tunnel tunnel-dmac command to configure the destination multicast MAC address for
BPDU tunnel frames.
Use the undo bpdu-tunnel tunnel-dmac command to restore the default value.
By default, the destination multicast MAC address for BPDU tunnel frames is 0x010F-E200-0003.
Examples
# Set the destination multicast MAC address for BPDU tunnel frames to 0100-0CCD-CDD0.
<Sysname> system-view
[Sysname] bpdu-tunnel tunnel-dmac 0100-0ccd-cdd0
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