Split horizon

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split horizon is a mechanism to avoid routing loops in ditance-vector routing protocols by reducing incorrect routing information and routing overhead. The concept of it's work is very simple: a route will never advertise by a router to the interface which it was learned from. It is simple to implement and some distance-vector routing protocols are using it. the RIP and VPLS is two important routing protocols (supported by Mikrotik RouterOS until this article writing time), which use split horizon.


According to the diagram, A router does not send it's route for C router back to B router. Split-horizon.jpg

--Vahid Alimohamadi 19:32, 4 January 2013 (UTC)