3Com 7757 Configuration Manual page 273

Figure 65 BPDU Tunnel network hierarchy
Packet input/output
Network A
BPDU Tunnel Configuration prerequisites
Configuration
MSTP is enabled on the current switch.
Configuration procedure
Table 207 Configure the BPDU Tunnel function
Operation
Enter system view
Enable MSTP globally
Enable the BPDU
Tunnel function
globally
Enter Ethernet port
view
Disable MSTP for the
port
Enable the VLAN VPN
function for the
Ethernet port
n
The BPDU Tunnel function can only be enabled on devices with STP enabled.
■
The BPDU Tunnel function can only be enabled on access ports.
■
To enable the BPDU Tunnel function, make sure the links between operator's
■
networks are trunk links.
If a fabric port exists on a switch, you cannot configure VLAN-VPN function on
■
any port of the switch.
As the VLAN-VPN function is unavailable on ports with 802.1x, GVRP, GMRP,
■
STP, or NTDP enabled, the BPDU Tunnel function is not applicable to these
ports.
Service provider network
device
Network
Customer networks
Command
system-view
stp enable
vlan-vpn tunnel
interface interface-type
interface-number
stp disable
vlan-vpn enable
BPDU Tunnel Configuration
Packet input/output
device
Network B
Description
-
-
Required
Make sure that you enter the
Ethernet port view of the port for
which you want to enable the
BPDU Tunnel function.
-
Required
By default, the VLAN VPN function
is disabled on all ports.
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