Figure 3-22 UPE dual-homing to NPE
3.7.7 FRR Protection
3.7.7.1 IP FRR
IP FRR (IP Fast ReRoute) can reach 50ms switching, which can reduce data loss in case
of failure to the best. IP FRR calculates standby route in advance. When active route fails,
another route calculation is not implemented. Standby route is adopted to switch traffic to
standby link. When active link recovers and gets stable, the traffic is switched back to the
active route as shown in Figure 3-23.
Figure 3-23 Route switching diagram
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