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.