3 Comments on “Which IGP protocol is a common choice to EIGRP and OSPF as a routing protocol for large networks?”

1. Keith says:

   May 18, 2012 at 12:34 pm

   “OSPF is perhaps the most widely-used interior gateway protocol (IGP) in large enterprise networks. IS-IS, another link-state dynamic routing protocol, is more common in large service provider networks.”
   http://en.wikipedia.org/wiki/Open_Shortest_Path_First

   IGRP is obsolete.
   http://en.wikipedia.org/wiki/Interior_Gateway_Routing_Protocol

   “The metric that RIP uses to rate the value of different routes is hop count. The hop count is the number of routers that can be traversed in a route. A directly connected network has a metric of zero; an unreachable network has a metric of 16. This small range of metrics makes RIP an unsuitable routing protocol for large networks.”
   http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfrip.html

   
   
   
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2. Keith says:

   May 18, 2012 at 12:37 pm

   “IS-IS is less “chatty” and can scale to support larger networks. Given the same set of resources, IS-IS can support more routers in an area than OSPF. This has contributed to IS-IS as an ISP-scale protocol.”
   http://en.wikipedia.org/wiki/IS-IS

   
   
   
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3. huey says:

   July 21, 2012 at 5:07 pm

   I dont understand the wording of the question…

   
   
   
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