Next hop ingress protection of label switched paths

摘要

A network node for providing ingress fault protection. The network node may be along a primary label switched path (LSP) and may be configured to receive an ingress protection request message that identifies one or more other network nodes along the primary LSP. The network node may generate a forwarding table that comprises one or more forwarding entries for the other network nodes along the primary LSP and one or more forwarding entries for the other network nodes along a backup LSP. In typical operation, the network node may receive data traffic from a first source path within a label switched network and may send the data traffic using the primary LSP. When an ingress node fault in the first source path is present, the network node may receive data traffic from a second source path and may send the data traffic using the backup LSP.

主权项

1. In a network node, a method for providing ingress fault protection in a label switched network, the method comprises:
receiving path information that identifies one or more other network nodes along a primary label switched path (LSP); creating a backup LSP to the other network nodes; generating one or more forwarding entries along the backup LSP, wherein the forwarding entries along the backup LSP comprise a status identifier that indicates an active state when data traffic is being sent using the backup LSP and an inactive state when data traffic is not being sent using the backup LSP; communicating data traffic from a first source path to one or more of the other network nodes; receiving data traffic from a second source path in response to an ingress node failure of the first source path; and sending the data traffic from the second source path using the forwarding entries and the backup LSP, wherein the network node is a member of the primary LSP.