# EIGRP Loop-Free Alternate (LFA) Fast Reroute (FRR)

**URL:** https://forum.networklessons.com/t/eigrp-loop-free-alternate-lfa-fast-reroute-frr/2149
**Category:** Lessons Discussion
**Created:** [September 7, 2017, 1:40pm UTC](https://forum.networklessons.com/t/eigrp-loop-free-alternate-lfa-fast-reroute-frr/2149 "2017-09-07T13:40:28Z")
**Posts on this page:** 1
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### Author: ![chrisnewnham17](https://cdn-forum.networklessons.com/letter_avatar_proxy/v4/letter/c/f9ae1b/32.png) [@chrisnewnham17](https://forum.networklessons.com/u/chrisnewnham17)
#### Post date: [September 21, 2017, 12:15pm UTC](https://forum.networklessons.com/t/eigrp-loop-free-alternate-lfa-fast-reroute-frr/2149/2 "2017-09-21T12:15:33Z")

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Hi Rene

Got a couple of questions - firstly after a while you stopped using the acronym LFA and used LSA instead - are they in fact the same thing? (I keep thinking of the completely unrelated Link State Advertisment when I read that!)

“When you have multiple possible LSAs, fast reroute has to select one LSA. EIGRP will not just select the “best” (lowest metric) feasible successor but uses some “tie-breakers” to select the best LSA. When you use per-prefix LSA, we have these four attributes:”

Also, is the tiebreaker “Lowest repair path metric” effectively just the normal EIGRP way of selecting the best path via lowest metric? (but actually installing it in the routing table)

Thanks

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