H3C Technologies H3C S12500-X Series Switches - Manual (Page 130)

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Tasks at a glance
2. (Required.) Associating a VPN instance with an interface
3. (Optional.) Configuring route related attributes for a VPN instance
(Required.) Configuring routing between a PE and a CE
(Required.) Configuring routing between PEs
(Optional.) Configuring BGP VPNv4 route control
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 basic MPLS for the MPLS backbone.
• Configure MPLS LDP for the MPLS backbone so that LDP LSPs can be established.
• Configure IP addresses for CE interfaces connected to PEs.
Configuring VPN instances
VPN instances isolate VPN routes from public network routes and routes among VPNs. This feature
allows VPN instances to be used in network scenarios besides MPLS L3VPNs.
All VPN instance configurations are performed on PEs.
Creating a VPN instance
A VPN instance is a collection of the VPN membership and routing rules of its associated site. A VPN
instance might not correspond to one VPN.
To create and configure a VPN instance:
Step Command Remarks
1. Enter system view. system-view N/A
2. Create a VPN instance and
enter VPN instance view.
ip vpn-instance vpn-instance-name
By default, no VPN instance is
created.
3. Configure an RD for the VPN
instance. route-distinguisher
route-distinguisher
By default, no RD is specified for a
VPN instance.
4. (Optional.) Configure a
description for the VPN
instance.
description text
By default, no description is
configured for a VPN instance.
5. (Optional.) Configure a VPN
ID for the VPN instance.
vpn-id vpn-id
By default, no VPN ID is configured
for a VPN instance.
Associating a VPN instance with an interface
After creating and configuring a VPN instance, associate the VPN instance with the interface connected
to the CE.
To associate a VPN instance with an interface: