Distance-vector routing protocol: Difference between revisions

Revision as of 14:35, 9 February 2019

Revision as of 16:18, 15 March 2019

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===Workarounds and solutions===

[[Routing Information Protocol|RIP]] uses the [[Split horizon route advertisement|split horizon]] with [[routeSplit poisoning|poisonhorizon route reverseadvertisement]] technique to reduce the chance of forming loops and uses a maximum number of hops to counter the 'count-to-infinity' problem. These measures avoid the formation of routing loops in some, but not all, cases.<ref>{{IETF RFC|1058}}, Section 2.2.2</ref> The addition of a ''hold time'' (refusing route updates for a few minutes after a route retraction) avoids loop formation in virtually all cases, but causes a significant increase in convergence times.

More recently, a number of loop-free distance vector protocols have been developed — notable examples are [[EIGRP]], [[DSDV]] and [[Babel (protocol)|Babel]]. These avoid loop formation in all cases, but suffer from increased complexity, and their deployment has been slowed down by the success of [[link-state routing protocol]]s such as [[OSPF]].