rtupdate0() uses these received values to update its own "distance table." The values it receives in a routing packet from some other node j contain j's current shortest path costs (j's distance vector) to all other network nodes. Rtupdate0() is the "heart" of the distance vector algorithm. Parameter *rcvdpkt is a pointer to the packet that was received. Was sent to it by one if its directly connected neighbors. Routine will be called when node 0 receives a routing packet that The format of the routing packet is also described below.
This minimum cost information is sent to neighboring nodes inĪ routing packet by calling the routine tolayer2(), as described below. It minimum cost paths, i.e., its distance vector, to all other network Needed by your node 0 routines, it should then send itsĭirectly-connected neighbors (in this case, 1, 2 and 3) the cost of Initializing the distance table, and any other data structures In the figure above, all links areīi-directional and the costs in both directions are identical. It should initialize the distance table (seeīelow) in node 0 to reflect the direct costs of 1, 3, and 7 to nodesġ, 2, and 3, respectively. rtinit0() This routine will be called once at the beginning of the emulation.Routines which will ``execute'' asynchronously within the emulatedĮnvironment that we have written for this assignment. Vector routing for the network shown below.įor the basic part of the assignment, you are to write the following Set of procedures that implement a distributed asynchronous distance Distributed Asynchronous Distance Vector Routingįinal) programming assignment, you will be writing a ``distributed''
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