3com S7906E 설치 설명서

 

2-2 

Set the description 
information for the VPN 
instance 

description text 

Optional 

By default, a VPN instance has no 
description configured. 

 

The RD configured for a VPN instance on the MCE device must be same as that configured for the VPN 

instance on the PE device.  

 

After creating a VPN instance, you need to associate it with the interface connecting a site to a PE.  

Follow these steps to associate an VPN instance with an interface: 

Enter system view 

— 

Enter interface view of the 
interface to be associated 

interface interface-type 
interface-number 

— 

Associate the current interface 
with the VPN instance 

ip binding vpn-instance 
vpn-instance-name 

Required 

By default, no interface is 
associated with a VPN instance.  

 

Executing the ip binding vpn-instance command invalidates the IP address configured for the current 

interface, so you need to configure an IP address for an interface again after associating the interface 

with a VPN instance.  

 

The process of advertising VPN routes is as follows:  

z 

When the switch learns a VPN route from a site and injects it into BGP, BGP associates the route 

with a VPN target extended community attribute list, which is normally the export route attribute list 

of the VPN instance.  

z 

A VPN instance determines whether to accept a received route according to the VPN target import 

extended community attribute list associated with the route and the setting specified by the 

vpn-target command.  

z 

A VPN instance modifies the export VPN target attribute according to the setting specified by the 

vpn-target command.  

Follow these steps to configure the route-related attributes for a VPN instance: