Method and apparatus for routing multicast data across multiple multicast routing domains connected by a shortest path bridging (SPB) network

摘要

A method and apparatus for routing multicast data across multiple multicast routing domains connected by a shortest path bridging (SPB) network is presented. A Shortest Path Bridging (SPB) edge router of an SPB network connected to a PIM network is configured as a Rendezvous Point (RP). A message is received at the RP, and in response, the RP forms a first data structure including multicast sender information. The RP floods the SPB network with a second message containing the first data structure, allocates an Identifier to the multicast stream, and sends a second data structure with sender information. An edge router with multicast receive interest responds with the second data structure with multicast receive interest information. As a result, a receiver in a second network has knowledge of devices in a first network such that multicast traffic is able to be routed between different networks connected to the SPB network.

主权项

1. A computer-implemented method in which a computer system performs operations comprising:
configuring each of a plurality of Shortest Path Bridging (SPB) edge routers of an SPB network connected to a Protocol Independent Multicast (PIM) based access network as a Rendezvous Point (RP); receiving at a first one of the plurality of RPs a first message; in response to the receiving a first message, the first one of the plurality of RPs forming a first data structure, the first data structure including multicast sender information comprising: Intermediate System to Intermediate System Internet Protocol Multicast Type, Length, Value (ISIS IPMC TLV) data structure; flooding, by the first one of the plurality of RPs, the SPB network with a second message containing the first data structure; allocating, by the first one of the plurality of RPs, an identifier (ISID) to the multicast stream and sending a second data structure with sender information; for an edge router with multicast receive interest, responding with the second data structure with multicast receive interest information; and wherein a receiver in a second network external to the SPB network has knowledge of devices in a first network external to the SPB network such that multicast traffic is able to be routed between different networks connected to the SPB network.