Method and route equipment for retransmitted layer proxy PIM

Abstract

The invention discloses a method for proxying PIM at the forwarding layer: the source directly connects to the designated router and the forwarding layer stores the received multicast data in a temporary forwarding table item, obtains forwarding information corresponding to the multicast data from the routing protocol layer, and according to the forwarding information Whether there is a PIM registration message identifier to process the multicast data in the temporary forwarding table entry; the forwarding layer of the aggregation point router stores the PIM registration message received from the source directly connected to the designated router in the temporary forwarding table entry, from the routing protocol The layer obtains the forwarding information corresponding to the PIM registration message, and processes the PIM registration message in the temporary forwarding entry according to whether the received PIM registration message identifier is included in the forwarding information. In the embodiment of the present invention, aiming at the PIM registration message mechanism, the number of transfers of valid data at the PIM routing protocol layer and the forwarding layer is reduced, and flow control can be realized; especially, unnecessary inter-board communication in a distributed router is effectively avoided , improving system performance.

Description

technical field [0001] The invention relates to the field of multicast technology, in particular to a forwarding layer agent PIM (Protocol Independent Multicast, Protocol Independent Multicast) method and routing equipment. Background technique [0002] IP multicast refers to sending data packets to a certain subset of nodes in the network in the form of Best-effort (best-effort delivery) in an IP network, and the subset of nodes is called a Multicast Group (multicast group). The basic principle of IP multicast is: the source host only sends one copy of data, and the destination address in this data is the multicast group address; all receivers in the multicast group can receive the same data copy, and only multicast The host in the group, that is, the target host, can receive the data, but other hosts in the network cannot receive the data. [0003] IP multicast technology effectively solves the problem of single-point transmission and multi-point reception, and realizes e...

AI Technical Summary

Problems solved by technology

Therefore, whether it is a designated router or an aggregation point router, there will be a large number of data packets between the main control board and the service board, which increases the communication pressure.

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