This article relates to the following DV (Distance Vector) routing protocols:
The Poisoning Route is an active mechanism by default.
Let's take up our architecture as seen in the Split-Horizon article:
The question to ask is:
What happens in the event of a network outage on one of our networks?
Let's say that Network 10 and Network 11 are no longer in working order.
The R1 router will:
1 / Remove Network 10 and Network 11 previously "Connected" from its routing table
2 / Send a message to neighbors that these two networks have an infinite metric
3 / The R2 router will therefore remove its two network from its routing table
The Poisoning Route is an active default mechanism and cannot be disabled
The "Road poisoning" allows to remove unavailable networks from our routing tables. If they don't have a default route, they'll be able to drop packages directly to an unavailable network.
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