As an example, the above print screen Figure1 a network I configured in Cisco Packet Tracer. In RIP a hop is counted as a metric from router to router. So if the source in this example is “PC-Jemine1” with the destination being “PC-Jemine2” RIP would use a hop count of 5. This would be:
➢ Source =PC-Jemine1
➢ Router 0 to Router 1 = Hop Count 1
➢ Router 1 to Router 3 = Hop Count 2
➢ Router 3 to Router 5 = Hop Count 3
➢ Router 5 to Router 8 = Hop Count 4
➢ Router 8 to Router 7 = Hop Count 5
➢ Destination = PC-Jemine2
The network I have designed in figure 1 can only send packets in two directions, either via:
➢ source PC-Jemine1 to Destination PC-Jemine 2
➢ Source PC-jemine2 to Destination PC-Jemine1
Both paths will give a max count of 5 from source to destination.
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RIP has a max hop count of 15, which will result in the discard of a message as the destination will be unreachable on the available paths.
Figure 2 – RIP MAX 15 Hop Count IGRP
IGRP stands for Interior Gateway Routing Protocol. It is important for networks to run smoothly for Quality of service purposes and IGRP helps to support this requirement of a network. As IGRP, “uses bandwidth to determine how to load balance.” Based on this theory IGRP can distribute packets across and prioritise when there is a faster available or a more suitable path should a link delay or fail due to the heavy amount of traffic which may be passing through the router.
Link State
1. In link-state routing, routers do maintain a map of the network. This occurs when the routing table is updated. “The accumulated data is used to commute a map of the