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Inter-AS MPLS TE path computation Inter-AS TE is a key requirement for (G)MPLS Stated in RFC4216 ASBR information is needed for inter-AS TE path computation When AS number occurs in ERO as a nexthop, it’s difficult to route to the AS without essential ASBR information. ASBR information SHOULD include: ASBRs’ location Neighboring ASBRs’ location Neighboring AS number, etc. |