H3C Technologies H3C S10500 Series Switches - Manual (Page 254)

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Task Remarks
Configuring routing between PEs Required
Configuring routing features for BGP VPNv4 subaddress family Optional
Configuration prerequisites
Before you configure basic MPLS L3VPN, complete the following tasks:
• Configure an IGP for the MPLS backbone (on the PEs and Ps) to achieve IP connectivity
• Configure the MPLS basic capability for the MPLS backbone
• Configure MPLS LDP for the MPLS backbone so that LDP LSPs can be established
Configuring VPN instances
By configuring VPN instances on a PE, you can isolate not only VPN routes from public network routes,
but also routes of a VPN from those of another VPN. This feature allows VPN instances to be used in
network scenarios besides MPLS L3VPNs.
All VPN instance configurations are performed on PEs or MCEs.
Creating a VPN instance
A VPN instance is associated with a site. It is a collection of the VPN membership and routing rules of its
associated site. A VPN instance does not necessarily correspond to one VPN.
Follow these steps to create and configure a VPN instance:
To do… Use the command… Remarks
Enter system view system-view —
Create a VPN instance and enter
VPN instance view
ip vpn-instance vpn-instance-name Required
Configure an RD for the VPN
instance route-distinguisher
route-distinguisher
Required
A VPN instance takes effect only
after you configure an RD for it.
Configure a description for the
VPN instance
description text
Optional
The description should contain the
VPN instance’s related
information, such as its relationship
with a certain VPN.
Associating a VPN instance with an interface
After creating and configuring a VPN instance, you need to associate the VPN instance with the interface
for connecting the CE. Any LDP-capable interface can be associated with a VPN instance. For
information about LDP-capable interfaces, see the chapter “MPLS basics configuration.”
Follow these steps to associate a VPN instance with an interface:
To do… Use the command… Remarks
Enter system view system-view —