H3C Technologies H3C S7500E Series Switches - Manual (Page 249)

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To do… Use the command… Remarks
Configure an RD for the VPN
instance
route-distinguisher
route-distinguisher
Required
Configure a description for the
VPN instance
description text Optional
Associating a VPN Instance with an Interface
After creating and configuring a VPN instance, you associate the VPN instance with the interface for
connecting CEs. Any interface supporting MPLS LDP capability can be associated with a VPN
instance. For interfaces supporting MPLS LDP capability, see MPLS Basics Configuration in the MPLS
Configuration Guide .
Follow these steps to associate a VPN instance with an interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Associate the current interface
with the VPN instance
ip binding vpn-instance
vpn-instance-name
Required
No VPN instance is associated
with an interface by default.
When configured on an interface, the ip binding vpn-instance command clears the IP address of the
interface. Therefore, you must re-configure the IP address of the interface after configuring the
command.
Configuring Route Related Attributes of a VPN Instance
The control process of VPN route advertisement is as follows:
z
When a VPN route learned from a CE gets redistributed into BGP, BGP associates it with a VPN
target extended community attribute list, which is usually the export target attribute of the VPN
instance associated with the CE.
z
The VPN instance determines which routes it can accept and redistribute according to the
import-extcommunity in the VPN target.
z
The VPN instance determines how to change the VPN targets attributes for routes to be
redistributed according to the export-extcommunity in the VPN target.
Follow these steps to configure route related attributes of a VPN instance