# OSPF Remote Loop-Free Alternate (LFA) Fast Reroute (FRR)

**URL:** https://forum.networklessons.com/t/ospf-remote-loop-free-alternate-lfa-fast-reroute-frr/10740
**Category:** Lessons Discussion
**Created:** [April 15, 2020, 10:46am UTC](https://forum.networklessons.com/t/ospf-remote-loop-free-alternate-lfa-fast-reroute-frr/10740 "2020-04-15T10:46:03Z")
**Posts on this page:** 1
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### Author: ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis)
#### Post date: [August 30, 2021, 5:06am UTC](https://forum.networklessons.com/t/ospf-remote-loop-free-alternate-lfa-fast-reroute-frr/10740/5 "2021-08-30T05:06:23Z")

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Hello Narad

In short, an LFA is a next-hop route that delivers a packet to its destination without looping back.

A Loop-Free Alternate (LFA) is a concept that is used in various technologies, including OSPF, other routing protocols, as well as in MPLS. An LFA is a node other than the primary neighbor, or the primary next hop. It is a backup of sorts. Traffic is immediately directed towards the LFA after a network failure. The LFA will receive traffic and will continue to forward it without any knowledge of a failure. LFAs always use a directly connected next hop.

Remote LFA involves the use of a tunnel to a next-hop that is not directly connected, as shown in the lesson. This is the primary difference between the two.

I hope this has been helpful!

Laz

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