3Com 8807 Command Reference Manual page 216

214 C 15: BPDU T
HAPTER
c
C C
UNNEL ONFIGURATION OMMANDS
Parameter
None
Description
Use the vlan-vpn tunnel command to enable bridge protocol data unit (BPDU)
Tunnel on the switch.
Use the undo vlan-vpn tunnel command to disable BPDU Tunnel on the switch.
BPDU Tunnel enables geographically segmented user network to transmit BPDU
packets transparently over the specified VLAN VPN on the operator's network. This
allows the user network to participate in a uniform spanning tree calculation while
maintaining a separate spanning tree from the operator network.
By default, BPDU Tunnel is disabled.
CAUTION:
To enable BPDU Tunnel on a switch, you must first enable STP on it. Otherwise,
■
the client network BPDU will not be processed by the CPU when entering the
switch, nor MAC address replacement or transparent transmission will be
implemented.
To enable BPDU Tunnel on a port, you must configure the port as access and
■
the intermediate carrier network as trunk.
You cannot enable BPDU Tunnel on a port on which DOT1X, GComware, STP
■
or NTDP is enabled.
Example
# Enable BPDU Tunnel on the switch.
<SW8800>system-view
System View: return to User View with Ctrl+Z.
[SW8800] vlan-vpn tunnel