Cisco Technology, Inc.

Jacob Ijsbrand Wijnands

Arjen Boers

Zafar Ali

Eric C Rosen

Sameer Ranjit Gulrajani

A method, system and an apparatus to transport bidir PIM over a multiprotocol label switched network are provided. The method may comprise receiving a multicast packet at a network element, the multicast packet including an upstream label. The method may further comprise identifying, from the upstream label, a Multicast Distribution Tree (MDT) rooted at a rendezvous point. The packet may be forwarded along the MDT towards the RP based on the upstream label. The MDT may be identified from a downstream label and the packet may be forwarded along the MDT away from the RP based on the downstream label.

Method to transport bidir PIM over a multiprotocol label switched network

A method is provided in one example embodiment and includes receiving a label-mapping message at a first router. The first router does not record the label-mapping message. The method further includes sending the label mapping message toward a root router of a Multipoint Label Switched Path (MPLSP) in a network and, further, evaluating a path vector sent from the root router to identify whether a first router's address is part of the path vector. If the first router's address is present in the path vector then a label mapping associated with the path vector is not installed by the first router. In more detailed embodiments, the first router identifies that if the first router's address is part of the path vector, a loop is present in the network. If the first router's address is not part of the path vector, the label mapping associated with the path vector is recorded.

System and method for detecting loops for routing in a network environment

In one example embodiment, a method of using protocol independent multicast (PIM) in a point-to-multipoint (P2MP) label switched path is provided. In this method, a label uniquely identifying the P2MP label switched path from different P2MP label switched paths is advertised. In response to the advertisement, a PIM message is received by way of a point-to-point (P2P) label switched path. This PIM message includes the advertised label. The label included in the PIM message is identified to correspond with the P2MP label switched path and the PIM message is reflected by way of the P2MP label switched path based on the identification.

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Leuven, Belgium

Jacob Ijsbrand Wijnands