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works by having each router start a timer when they first receive information about a network that is unreachable. Until the timer expires, the router will discard any subsequent route messages that indicate the route is in fact reachable. It can solve the case where multiple routers are connected
49:. If the router detects that a network is unreachable, the timer is started. The router will then wait a preset number of seconds until the network is stable. When the timer expires, the router will then receive its routing updates from other routers. For example, in
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from receiving route updates until the network appears to be stable—until either an
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This article is about the network routing heuristic. For other uses, see
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stops changing state (flapping) or a better route is learned.
71:"RIP Special Features For Resolving RIP Algorithm Problems"
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and split horizon with poisoned reverse can do nothing.
53:the default holddown timer is set to 180 seconds.
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34:In other words, a holddown keeps a
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73:. The TCP/IP Guide. 2005-09-20
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57:References
40:interface
92:Category
24:Holddown
47:timers
36:router
51:RIP
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