MPLS
Page 28 7210 SAS M, T, X, R6, Mxp MPLS Configura-
tion Guide
The switchover time is measured from the time the control plane detected the failure of the
interface or neighbor/next-hop to the time the IOM completed the reprogramming of all the
impacted ILM or service records in the data path. This includes the time it takes for the control
plane to send a down notification to all IOMs to request a switch to the backup NHLFE.
Uniform Fast-Reroute (FRR) failover enables the switchover of MPLS and service packets from
the outgoing interface of the primary LSP path to that of the FRR backup LSP within the same
amount of time regardless of the number of LSPs or service records. This is achieved by updating
Ingress Label Map (ILM) records and service records to point to the backup Next-Hop Label to
Forwarding Entry (NHLFE) in a single operation.
Configuration Guidelines
Implicit NULL must be enabled for use of Manual Bypass or Dynamic Bypass (FRR facility) if
the 7210 is used as a egress LER and/or is a Merge Point.
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