Fast reroute is a MPLS

Mpls

MPLS or Mpls can refer to:* Minneapolis, Minnesota, United States* Multiprotocol Label Switching, a data-carrying mechanism in computer networking...

 (Multiprotocol Label Switching) resiliency technology to provide fast traffic recovery upon link or router failures for mission critical services. Upon any single link or node failures, it could be able to recover impacted traffic flows in the level of 50 ms. Industrial implementations can be seen in vendors such as Cisco

Cisco

Cisco may refer to:Companies:*Cisco Systems, a computer networking company* Certis CISCO, corporatised entity of the former Commercial and Industrial Security Corporation in Singapore...

, Juniper

Juniper Networks

Juniper Networks is an information technology and computer networking products multinational company, founded in 1996. It is head quartered in Sunnyvale, California, USA. The company designs and sells high-performance Internet Protocol network products and services...

, Alcatel-Lucent

Alcatel-Lucent

Alcatel-Lucent is a global telecommunications corporation, headquartered in the 7th arrondissement of Paris, France. It provides telecommunications solutions to service providers, enterprises, and governments around the world, enabling these customers to deliver voice, data, and video services...

etc.

Methods of backup

Backup path can be configured for:

1. Link protection

2. Node protection

There are two methods to back up an LSP:

1. One to One - this method creates detour LSPs for each protected LSP at each potential point of local repair

2. Facility - this method creates a bypass tunnel to protect a potential failure point