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Directions for future work

Our work can be extended in several directions. First, our algorithm selects a single backup path to protect a multicast routing tree from a single link failure. Extensions to our algorithm may take into account node failures, multiple link or multiple node failure, or the computation of several backup paths to improve the resilience of the multicast routing tree.

Second, although the message format of MulTreeLDP is the same as the format of CR-LDP messages, MulTreeLDP and CR-LDP are different protocols. Since LDP/CR-LDP is the reference signaling protocol for MPLS, MulTreeLDP should be merged with CR-LDP and eventually standardized as a part of CR-LDP. Concerning MPLS multicast Fast Reroute, our experiments show that the transient network overload due to switchback does not disrupt network operations, temporary transmission of duplicate packets may occur. Clearly, it is desirable to totally avoid the forwarding and delivery of duplicate packets.

Finally, we implemented our solution on a small network of PC routers. We performed our experiments on a single multicast LSP and a single flow. An extension to our work includes an implementation in commercial routers and deployment in large scale networks.


next up previous contents
Next: Bibliography Up: Conclusion Previous: Contributions   Contents
Yvan Pointurier 2002-08-11