1-23Task RemarksConfiguring BGP AS Number Substitution OptionalConfigure it as neededigure MPLS L3VPN:Configuring VPN InstancesVPN instances are used to isolate VPN routes from public network routes. Configuring VPN instances isrequired in all MPLS L3VPN networking schemes.In addition, routes of a VPN instance are isolated from those of another. This feature allows VPNinstances to be used in networking schemes other than MPLS L3VPNs.All VPN instance configurations are on PEs.This section includes the following configurations:z Creating a VPN Instancez Associating a VPN Instance with an Interfacez Configuring Route Related Attributes of a VPN Instancez Configuring a Tunneling Policy of a VPN InstanceCreating a VPN InstanceA VPN instance is associated with a site, rather than a VPN. It is a collection of the VPN membershipand routing rules of its associated site.A VPN instance takes effect only after you configure an RD for it. Before configuring an RD for a VPNinstance, you can configure no parameters for the instance other than a description.A VPN instance description is a piece of descriptive information about the VPN instance. You can use itto keep information such as the relationship of the VPN instance with a VPN.Follow these steps to create and configure a VPN instance:To do… Use the command… RemarksEnter system view system-view —Create a VPN instance andenter VPN instance viewip vpn-instancevpn-instance-name RequiredConfigure an RD for the VPNinstanceroute-distinguisherroute-distinguisher RequiredConfigure a description for theVPN instance description text OptionalAssociating a VPN Instance with an InterfaceAfter creating and configuring a VPN instance, you associate the VPN instance with the interface forconnecting CEs. Any interface supporting MPLS LDP capability can be associated with a VPN instance.For interfaces supporting MPLS LDP capability, refer to MPLS Basics Configuration in the MPLSVolume.
