Patent ID: 9705789
Date: 2017-07-11
CPC Classifications: H04L

Claim:
1. A method, comprising: learning a topology of a domain to determine broadcast routing trees in the domain by a master node of the domain; storing, at a first node of the domain, the broadcast routing trees; forwarding, from the first node to next nodes, a probe message transmitted from a second node in response to a request from a third node; receiving a path indication message unicasted hop by hop from the third node in a reverse order of a path determined by the third node; storing, at the first node, a multicast address table including a list of nodes in association with a multicast flow; and determining the list of nodes based on a snapshot of information of a unicast routing table such that the list of nodes included in the multicast address table does not change when the information in the unicast routing table is updated.