Computer Systems Technology DCN386 Lecture Notes - Lecture 3: Network Layer, Unicast, Open Shortest Path First
14 Dec 2015
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Document Summary
To help build routing tables by sharing connected interfaces. Convergence when all routers have all entries(routes) from other routers. Ietf (internet engineering task force) if you see rfc , associate it with ietf. Distance vector protocol uses hop count as a metric. Hop count limited to 15 hops if you go beyond that limit you get a routing. Hop count 16, usually used to show an invalid route. Sends routing table via a broadcast every 30 seconds + random interval(to prevent simultaneous broadcast packets) eats up a lot of bandwidth. Rip vulnerability route spoofing false rip information is sent. Ripv1 does not transmit the mask. Ripng (ng next generation) - allows for ipv6. Layer 3 , also has to use layer 4 for transmission, udp, port 520. Distance vector protocol uses combination of hop count, bandwidth, congestion, qos as a metric. Sends link state advertisements (l. s. a) - communication means for.
