324CHAPTER 35: VLAN-VPN CONFIGURATION GUIDE

Configure Switch B

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vlan 1040

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interface Ethernet1/0/21 port access vlan 1040 undo ntdp enable

stp disable vlan-vpn enable vlan-vpn tpid 9200

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interface Ethernet1/0/22 port link-type trunk

port trunk permit vlan 1 1040 vlan-vpn tpid 9200

Precautions 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.

Configuring BPDU

With the BPDU tunnel feature, a switch can transmit Layer 2 protocol packets

Tunnel

(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.

Network Diagram

Figure 112 Network diagram for configuring BPDU tunnel

 

P rovider 1

 

P rovider 2

 

 

E th 1/0/2

Network

 

 

 

 

 

E th 1/0/3

 

 

 

 

 

E th 1/0/1

 

 

 

E th 1/0/4

 

 

 

 

 

 

 

 

C ustom er1

 

C ustom er2

Networking and

Customer 1 and Customer 2 are customer side devices, while Provider 1 and

Configuration

Provider 2 are edge devices of the service provider. Customer 1 and Customer 2

Requirements

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.

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3Com 5500G, 4210, 4200G manual Tunnel, Packets of all VLANs