Constructing a topology-transparent zone

摘要

A network node used to construct a topology-transparent zone (TTZ). The network node may obtain a TTZ identifier (ID) that is uniquely associated with a TTZ. Additionally, the network node may obtain a first link that couples the network node to a second network node that is also assigned the TTZ ID and a second link that couples the network node to a third network node that is not assigned the TTZ ID. The network node may generate a router information (RI) link-state advertisement (LSA) that indicates whether the network node is a TTZ edge node or a TTZ internal node and that indicates the TTZ associated with the TTZ. The network node may distribute the RI LSA to the second network node that is also assigned the TTZ ID using the first link.

主权项

1. In a network component, a method for constructing a topology-transparent zone (TTZ), the method comprising:
obtaining a TTZ identifier (ID) uniquely associated with the TTZ; identifying a first link connected to a second network node that is assigned the TTZ ID; identifying a second link connected to a third network node not assigned the TTZ ID; generating a router information (RI) link-state advertisement (LSA) comprising a first field that indicates a network node type and a second field that indicates the TTZ ID; distributing the RI LSA using the first link; generating an LSA for virtualizing the TTZ for the network component comprising the second link and one or more virtual links; sending the LSA for virtualizing the TTZ using the second link; receiving a second RI LSA that comprises the TTZ ID storing at least a portion of information within the second RI LSA into a link-state database (LSDB); and computing a path using the second RI LSA and the LSDB, wherein each virtual link of the one or more virtual links is a logical link between two edge nodes via at least one additional node of the TTZ, and wherein the TTZ is a zone within an area that is part of a network.