A Convergent Method of Reducing Packet Loss During Rerouting in Multicast Tree Based on Label Forwarding

The problem of link failure in the MPLS multicast network with adaptive optimization path built in a "receiver-initiated [1]" manner is studied. With respect to the overly long traffic interruption time caused by path conflict due to the link failure during LSP reconstruction, this paper proposes a lightweight solution that can significantly reduce the traffic interruption time. The key of the method is to establish a non-optimal fault-free LSP as soon as the link fails to reduce packet loss and then switch to the optimal path when available. In most cases, this approach reduces traffic interruption times compared to traditional optimal convergence.