RSVP-TE Facility Backup (Facility Bypass)
RSVP supports multiple path protection mechanisms and facility backup is one of them. With facility backup protection, N number of LSPs sharing the common path can be protected using one bypass tunnel which leads to resource utilization.
| • | Do not configure a facility backup trunk with the same transit node as that of the primary trunk. |
| • | IP BFD must be configured at 3.3ms to achieve 50ms switchover for RSVP FRR. |
Topology
As shown in Figure 90, we have four routers R1, R2, R3, and R4.
Figure 90. RSVP facility backup
