PIM sparse-mode emulation over MPLS LSP's

摘要

An apparatus and method for emulating a shared or source distribution tree within an MPLS network. In one embodiment of the method, a router receives a multicast data packet. The router transmits the multicast data packet to a first router via a first point-to-point label switched path (LSP). The router replicates the multicast data packet to produce a replicated multicast data packet. Then the router transmits the replicated multicast data packet to a second router via a second point-to-point LSP. The first point-to-point LSP is distinct from the second point-to-point LSP.

主权项

1. A method comprising:
receiving, by a first router, a multicast data packet comprising an IP address of a source, wherein the multicast data packet originates from the source, the first router is within a MPLS network, and the first router receives the multicast data packet from the source via a non-MPLS router; transmitting, by the first router, the multicast data packet towards a second router via a first interface of the first router; replicating, by the first router, the multicast data packet to produce a replicated multicast data packet; transmitting, by the first router, the replicated multicast data packet towards a sec-end third router via the first interface; receiving, by the first router, a control packet directly or indirectly from the first second router after the first second router receives the multicast data packet; receiving, by the first router, another multicast data packet, wherein the other multicast data packet comprises the IP address of the source; and in response to the first router receiving the control packet and the other multicast data packet, the first router transmitting the other multicast data towards the third router via the first interface without the first router transmitting the other multicast data packet or replication thereof to the second router.