3com 5500 用户手册

C

HAPTER

 35: VLAN-VPN C

ONFIGURATION

 G

UIDE

■

Configure Switch B

#

vlan 1040

#

interface Ethernet1/0/21

port access vlan 1040

undo ntdp enable

stp disable

vlan-vpn enable

vlan-vpn tpid 9200

#

interface Ethernet1/0/22

port link-type trunk

port trunk permit vlan 1 1040

vlan-vpn tpid 9200 

■

Do not configure VLAN 1040 as the default VLAN of Ethernet 1/0/12 of Switch 
A or Ethernet 1/0/22 of Switch B. Otherwise, the outer tag will be removed 
before a packet is transmitted.

■

This example assumes that Ethernet 1/0/11 of Switch A and Ethernet 1/0/21 of 
Switch B are both access ports. If the two ports are trunk or hybrid ports, 
specify the default VLAN of the two ports as VLAN 1040, and configure the 
ports to send untagged packets of VLAN 1040. For detailed information, refer 
to “Port Basic Configuration” in the Configuration Guide for your product.

With the BPDU tunnel feature, a switch can transmit Layer 2 protocol packets 
(NDP packets in this example) along tunnels established on the public network, 
implementing unified network calculation and maintenance for the private 
networks connected through the public network.

Figure 112   Network diagram for configuring BPDU tunnel

 

■

Customer 1 and Customer 2 are customer side devices, while Provider 1 and 
Provider 2 are edge devices of the service provider. Customer 1 and Customer 2 
are connected to Ethernet 1/0/1 of Provider 1 and Ethernet 1/0/4 of Provider 2 
respectively.

■

Provider 1 and Provider 2 are connected through trunk a link, which permits 
packets of all VLANs.

Network

E th 1/0/1

E th 1/0/2

E th 1/0/3

C ustom er1

C ustom er2

P rovider 1

P rovider 2

E th 1/0/4