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Having the routes available within the standard routing table can be useful for some systems and network applications as there is no route discovery delay associated with finding a new route. The routing overhead generated, while generally greater than that of a reactive protocol, does not increase with the number of routes being created.
Route table showing internet BGP routes In computer networking , a routing table , or routing information base ( RIB ), is a data table stored in a router or a network host that lists the routes to particular network destinations, and in some cases, metrics (distances) associated with those routes.
Static routes, connected routes, and routes from dynamic configuration protocols can be redistributed by dynamic routing protocols. For instance, a router may have a static or connected route for a local network segment, which is then redistributed over dynamic routing protocols to enable connectivity to that network.
By declaring the totally stubby area as NSSA, no external routes from the backbone, except the default route, enter the area being discussed. The externals do reach area 0.0.0.0 via the TSA-NSSA, but no routes other than the default route enter the TSA-NSSA. Routers in the TSA-NSSA send all traffic to the ABR, except to routes advertised by the ...
Routing is the process of selecting a path for traffic in a network or between or across multiple networks. Broadly, routing is performed in many types of networks, including circuit-switched networks, such as the public switched telephone network (PSTN), and computer networks, such as the Internet.
IP forwarding algorithms in most routing software determine a route through a shortest path algorithm. In routers, packets arriving at an interface are examined for source and destination addressing and queued to the appropriate outgoing interface according to their destination address and a set of rules and performance metrics.
The letter "S" indicates that the route is a static route that has, for all intents and purposes, been added manually to the router process by the administrator and installed into the routing table. Router#enable Router#configure terminal Router(config)#ip route 1.1.1.0 255.255.255.0 fastEthernet 0/0 Router(config)#do show ip route
Key bit. Set to 1 if a key is present. S (1 bit) Sequence number bit. Set to 1 if a sequence number is present. s (1 bit) Strict source route bit. Recur (3 bits) Recursion control bits. Flags (5 bits) Reserved for future use, set to 0. Version (3 bits) Set to 0. Protocol Type (16 bits) Indicates the ether protocol type of the encapsulated payload.