3Com Switch 8800 Family Configuration Guide

164 CHAPTER 20: BPDU TUNNEL CONFIGURATION
By default, BPDU Tunnel is disabled.
Enabling/disabling VLAN
VPN on Ethernet port
Perform the following configuration in Ethernet port view.
By default, the VLAN VPN is disabled on all the ports.
VLAN VPN is not compatible with STP, DOT1X, GVRP, and NTDP.
n
In Ethernet port view, VLAN VPN and STP are not compatible with each other and
cannot function at the same time.
BPDU Tunnel
Configuration
Example
Network requirements
■ The Switch 8800 Family Series Routing Switches are used as the access devices
of the operator’s network, that is, Switch C and Switch D in the following
figure.
■ The Switch 5500 Series Ethernet Switches are used as the access devices of the
user network, that is, Switch A and Switch B in the following figure.
■ Switch C and Switch D connect to each other through trunk port, enabling the
BPDU Tunnel function in system view, and implementing the transparent
transmission between user network and operator’s network. VLAN 20 is
assigned to the user network.
Network diagram
Figure 37 Network diagram for BPDU Tunnel configuration
Tabl e 141 Enable/disable BPDU Tunnel in system view
Operation Command
Enable BPDU Tunnel vlan-vpn tunnel
Disable BPDU Tunnel undo vlan-vpn tunnel
Tabl e 142 Enable/disable VLAN VPN in Ethernet port view
Operation Command
Enable VLAN VPN vlan-vpn enable
Disable VLAN VPN undo vlan-vpn
E 3/1/1
Switch C
Switch A
E 4/1/1
E 0/1
Switch D
Switch B
E 3/1/2
E 0/1
E 4/1/2