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Configuring Inter-AS Seamless MPLS
In the inter-AS seamless MPLS networking, the access and aggregation layers belong to one AS, and the core layer belong to another AS. An inter-AS BGP LSP is established across the three layers to implement E2E service connectivity.
Pre-configuration Tasks
Before configuring inter-AS seamless MPLS, complete the following tasks:
Configure IGP protocols to implement connectivity at the access, aggregation, and core layers and enable MPLS LDP to implement the MPLS forwarding on a public network.
- Configure an EBGP peer relationship between each pair of an AGG ASBR and core ASBR and an IBGP peer relationship between each pair of the following nodes:
- CSG and AGG
- AGG and AGG ASBR
- Core ASBR and MASG
