Source routing in multicast transmissions

摘要

The subject technology provides configurations for receiving, at a first network device, a multicast packet of a multicast transmission from a multicast source. A header is inserted including one or more fields of information for a multicast distribution tree into the multicast packet in which the fields of information include a root level node field indicating a root node of the multicast distribution tree and one or more second level fields indicating one or more child nodes of the root node of the multicast distribution tree. In one example, the fields of information are not duplicative of routing information, stored by the first network device, corresponding to the one or more child nodes. The subject technology then forwards the multicast packet including the inserted header to respective network devices corresponding to the one or more child nodes based on the one or more fields of information from the inserted header.

主权项

1. A computer-implemented method comprising:
receiving, at a first network device, a multicast packet of a multicast transmission from a multicast source; inserting a header including one or more fields of information for a multicast distribution tree into the multicast packet, wherein the one or more fields of information include a root level node field indicating a root node of the multicast distribution tree and one or more second level fields indicating one or more child nodes of the root node of the multicast distribution tree, wherein the multicast distribution tree comprises a point-to-multipoint tree and the one or more fields of information are not duplicative of routing information, stored by the first network device, corresponding to the one or more child nodes, and wherein the one or more fields of information identify links between respective nodes for forwarding the multicast packet; and forwarding the multicast packet including the inserted header to respective network devices corresponding to the one or more child nodes based on the one or more fields of information from the inserted header.