Split horizon rule: Difference between revisions
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In [[routing protocol]]s, the '''split horizon rule''' states that a [[router]] must not readvertise a route to the router from which a route was first learned. It is a means of preventing loops from forming, and is used with distance vector protocols such as [[Routing Information Protocol]] (RIP) and the [[Interior Gateway Routing Protocol]], and the path vector protocol, [[Border Gateway Protocol]]. | |||
==Distance vector== | |||
===General case=== | |||
===Nonbroadcast multiaccess case=== | |||
==Path vector== | |||
Revision as of 18:56, 21 January 2011
In routing protocols, the split horizon rule states that a router must not readvertise a route to the router from which a route was first learned. It is a means of preventing loops from forming, and is used with distance vector protocols such as Routing Information Protocol (RIP) and the Interior Gateway Routing Protocol, and the path vector protocol, Border Gateway Protocol.