First-hop redundancy protocol
From HandWiki
Short description: Computer networking protocol allowing first hop fallback on router failure
A first hop redundancy protocol (FHRP) is a computer networking protocol which is designed to protect the default gateway used on a subnetwork by allowing two or more routers to provide backup for that address;[1][2] in the event of failure of an active router, the backup router will take over the address, usually within a few seconds. In practice, such protocols can also be used to protect other services operating on a single IP address, not just routers.
Examples of such protocols include (in approximate order of creation):
- Hot Standby Router Protocol (HSRP) - Cisco's initial, proprietary standard developed in 1998[3]
- Virtual Router Redundancy Protocol (VRRP) - an open (albeit patent-encumbered) standard protocol based largely on Cisco's HSRP
- Common Address Redundancy Protocol (CARP) - patent-free, unencumbered alternative to Cisco's HSRP and the IETF's VRRP, developed in October 2003
- Extreme Standby Router Protocol (ESRP) - Extreme Networks' proprietary standard with fast failover and layer 2 protection
- Gateway Load Balancing Protocol (GLBP) - a more recent proprietary standard from Cisco that permits load balancing as well as redundancy
- Routed Split multi-link trunking (R-SMLT) - an Avaya redundancy protocol
- NetScreen Redundancy Protocol (NSRP) - a Juniper Networks proprietary router redundancy protocol providing load balancing
- Chassis Cluster Redundant Ethernet - a Juniper Networks proprietary Ethernet redundancy protocol, used on its SRX platform[4]
- Multi-active Gateway Protocol (MAGP) - a Mellanox proprietary protocol based on VRRP that allows active-active operation[5]
References
- ↑ "First Hop Redundancy Protocol (FHRP)" (in en). https://www.cisco.com/c/en/us/products/ios-nx-os-software/first-hop-redundancy-protocol-fhrp/index.html.
- ↑ gokhankosem (2018-10-16). "First Hop Redundancy Protocols" (in en-US). https://ipcisco.com/lesson/first-hop-redundancy-protocols/.
- ↑ "Cisco Protocols: HSRP, VRRP, GLBP" (in en-US). 2012-04-11. https://www.petri.com/cisco-first-hop-redundancy-protocols.
- ↑ "Chassis Cluster Redundant Ethernet Interfaces - TechLibrary - Juniper Networks" (in en-US). 2019-05-30. https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-chassis-cluster-redundant-ethernet-interfaces.html.
- ↑ "HowTo Configure MAGP on Mellanox Switches". 1 March 2020. https://community.mellanox.com/s/article/howto-configure-magp-on-mellanox-switches.
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