H3C Technologies H3C S7500E Series Switches - Manual (Page 263)

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When configuring basic MPLS L3VPN for each AS, specific configurations may be required on PEs or
ASBR-PEs. This depends on the inter-provider VPN solution selected.
Configuring Inter-Provider VPN Option A
Inter-provider VPN option A applies to scenarios where the number of VPNs and that of VPN routes on
the PEs are relatively small. It is simple to implement.
To configure inter-provider VPN option A, you only need to:
z
Configure basic MPLS L3VPN on each AS.
z
Configure each ASBR, taking the peer ASBR PE as its CE.
In other words, configure VPN instances for PEs and ASBR PEs respectively. The VPN instance for
PE is used to allow CEs to access the network, while that for ASBR-PE is used to access its peer
ASBR-PE.
See Configuring Basic MPLS L3VPN .
In the inter-provider VPN option A solution, for the same VPN, the VPN targets for the VPN instances
of the PEs must match those for the VPN instances of the ASBR-PEs in the same AS. It is not
required for PEs in different ASs.
Configuring Inter-Provider VPN Option B
Follow these steps to configure inter-provider VPN option B on ASBR PEs:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view for the
interface connecting to the remote
ASBR-PE
interface interface-type
interface-number
—
Configure the IP address of the
interface
ip address ip-address { mask |
mask-length }
Required
Return to system view quit —
Enter BGP view bgp as-number —