A customer reports that each time a networking component fails, OSPF recalculates the backup path, with causes a short outage. Which solution must the customer implement to improve this situation?

The correct answer is B. LFA FRR. OSPF Loop-Free Alternate (LFA) Fast Reroute (FRR) allows OSPF to quickly switch (within 50 ms) to a backup path when a primary path fails. Without LFA FRR, OSPF has to re-run SPF to find a new path when the primary path fails. With LFA FRR, OSPF pre-computes a backup path and…

Advanced Addressing and Routing Solutions

Question

Options

AAggressive OSPF timers
BLFA FRR
CIncremental SPF
DBFD

How the community answered

(23 responses)

A
17% (4)
B
70% (16)
C
9% (2)
D
4% (1)

Explanation

OSPF Loop-Free Alternate (LFA) Fast Reroute (FRR) allows OSPF to quickly switch (within 50 ms) to a backup path when a primary path fails. Without LFA FRR, OSPF has to re-run SPF to find a new path when the primary path fails. With LFA FRR, OSPF pre-computes a backup path and installs the backup next hop in the forwarding table. https://networklessons.com/cisco/ccie-routing-switching-written/ospf-loop-free-alternate-lfa-fast-

Topics

#OSPF#Fast Reroute#Network Convergence

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