Method, apparatus and system for forwarding data under protocol independent multicast dual join

摘要

Embodiments of the present invention relates to the field of communications, which complements a data forwarding method of a backup incoming interface under protocol independent multicast dual join in a PIM protocol, facilitates implementation of compatibility in various manufacturers, and reduces a restriction of a network topology on the application of the PIM protocol. The method includes: when a main incoming interface is up, forwarding, by a router, multicast data received from a backup incoming interface to the main incoming interface in a join state; and when the main incoming interface is down, before selecting a new main incoming interface and/or backup incoming interface, forwarding, by the router, the multicast data received from the backup incoming interface to all interfaces in a join state or to all other interfaces in a join state except the backup incoming interface.

主权项

1. A method for forwarding data under protocol independent multicast dual join, wherein under the protocol independent multicast dual join, a router comprises a main incoming interface and a backup incoming interface, and the method comprises:
when the main incoming interface is up, forwarding, by the router, multicast data, sent by a neighboring router, received from the backup incoming interface to the main incoming interface in a join state without forwarding the multicast data to an interface that is in a join state and is different from the main incoming interface and the backup incoming interface; and when the main incoming interface is down, before selecting a new main incoming interface and/or backup incoming interface, forwarding, by the router, the multicast data sent by the neighboring router back to the neighboring router via the backup incoming interface.