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The administrative distance can be manually (re)configured so that the static route can be configured as a backup route, to be used only if the dynamic route is unavailable. [ 12 ] (config) # ip route 10 .10.20.0 255 .255.255.0 exampleRoute 1 254
Administrative distance (AD) or route preference [1] is a number of arbitrary unit assigned to dynamic routes, static routes and directly-connected routes. The value is used in routers to rank routes from most preferred (low AD value) to least preferred (high AD value).
The routing table contains information about the topology of the network immediately around it. The construction of routing tables is the primary goal of routing protocols. Static routes are entries that are fixed, rather than resulting from routing protocols and network topology discovery procedures.
Metrics cannot be compared between routes learned from different routing protocols. Administrative distance: When comparing route table entries from different sources such as different routing protocols and static configuration, a lower administrative distance indicates a more reliable source and thus a preferred route.
E-Cube routing is a static routing method that employs XY-routing algorithm. This is commonly referred to as Deterministic, Dimension Ordered Routing model. E-Cube routing works by traversing the network in the k th dimension where k is the least significant non-zero bit in the result of calculating distance.
default or static routes that are manually configured, [3] [4] on-demand routing, [5] dynamic routing protocols, [6] or; Policy-based routing. [7] In a small network such as a home or home office, a default route is often used to send all traffic to the user's Internet service provider.
Distance is a measure of the cost to reach a certain node. The least cost route between any two nodes is the route with minimum distance. Updates are performed periodically in a distance-vector protocol where all or part of a router's routing table is sent to all its neighbours that are configured to use the same distance-vector routing protocol.
Static routes also may have preference factors used to select the best static route to the same destination. One application is called a floating static route, where the static route is less preferred than a route from any routing protocol. The static route, which might use a dialup link or other slow medium, activates only when the dynamic ...