3Com Switch 8800 Family Configuration Guide

VLAN-VPN Tunnel Configuration 859

# Disable the STP protocol and enable VLAN-VPN on Ethernet3/1/3.

[Switch_D] interface Ethernet3/1/2

[Switch_D-Ethernet3/1/2] stp disable

[Switch_D-Ethernet3/1/2] vlan-vpn enable

[Switch_D-Ethernet3/1/2] quit

# Set Ethernet3/1/3 to a trunk port and add this port to all the VLANs.

[Switch_D] interface Ethernet3/1/3

[Switch_D-Ethernet3/1/3] port link-type trunk

[Switch_D-Ethernet3/1/3] port trunk permit vlan all

CAUTION:

■ STP must be enabled on VLAN-VPN tunnel-enabled devices; otherwise BPDUs

in the user network cannot be transmitted transparently.

■ VLAN-VPN-enabled ports must be configured to Access ports. The link type of

the intermediate operator’s network must be configured to the Trunk link.

■ You cannot configure VLAN-VPN tunnel on the ports where DOT1X, GVRP, STP,

or NTDP is enabled.