February 2018
Intermediate to advanced
396 pages
9h 38m
English
Content preview from Advanced Infrastructure Penetration Testing
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Interior Gateway Routing Protocol
The Interior Gateway Routing Protocol (IGRP) is a classful distance vector routing protocol. Like RIP, the routing decisions in IGRP are based on the Bellman-Ford algorithm, using the hop counts. It is not an open standard. It is a Cisco proprietary. The maximum supported hops are 255 with a default value of 100. So, it is more scalable for large companies, more than RIP. Also, it is easy to configure:
Router(config)# router igrp <AS NUM HERE>Router(config-router)# network < NeT ID Here >
IGRP sends information every 90 seconds periodically in the same autonomous system. This timer is named the update timer. If an update takes more than 270 seconds (invalid timer), then it will be invalid, and it will ...