A PROTECTION SWITCHING METHOD OF A MULTI-PROTOCOL LABEL SWITCHING NETWORK

The embodiments of the present invention provide a method for implementing protection switching in Multi-protocol Label Switching (MPLS) network, the method includes: establishing a first Label Switching Path (LSP) from a first Egress Label Switched Router (LSR) to an Ingress LSR; transmitting, by the first Egress LSR, first probe packets to the Ingress LSR via the first LSP; switching, by the Ingress LSR, working traffic to a protection LSP when the Ingress LSR does not receive the first probe packets. According to the embodiments of the present invention, the Ingress LSR may learn the failure of the Egress LSR according to the result of receiving the probe packets when a failure of the Egress LSR occurs, and switches the working traffic correspondingly. Moreover, the working LSP and protection LSP are not terminated at a same Egress LSR, but correspond to different Egress LSRs which greatly improves the security of the MPLS network.