Routing information protocol updating algorithm
However, static routing is sometimes used in larger networks as a small piece of an overall dynamically controlled routing infrastructure.In such cases, static routes typically configure default routes, or direct traffic out of the network to another network controlled by another party.Four IGPs are the most popular: These EGP and IGP protocols are split into three different types of routing protocol: distance vector, link-state, and path vector.
is also used when a router advertises routes out its interfaces.
These reasons indicate why dynamic routing protocols are used on larger networks, and static routing is left for very small networks or other specific use cases.
Dynamic routing protocols avoid the manual configuration problem; they also are built to handle many complex topologies, as well as dealing with network outages—without the need for additional administrative attention.
Loop management for distance vector routing protocols uses two different methods: poison reverse and split horizon.
is used every time a new route is learned from a neighbor; when this happens, the router automatically sends a route advertisement back out the learned interface with an infinite metric.