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Talk:Enhanced Interior Gateway Routing Protocol

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This is an old revision of this page, as edited by Daedalus01 (talk | contribs) at 17:37, 1 June 2007 (→Maximum EIGRP Hop Count). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

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Reworking

Hello to anyone. I have partially reworked the article on December 26th (from IP address 158.193.152.134, just forgot to log in). I would like to hear anyone's suggestions to article contents, completeness and clarity. There are still crucial parts missing:

  • description of diffusing computations as proposed by Dijkstra and Scholten
  • description of the DUAL finite state machine itself
  • description of the overall EIGRP algorithm
  • What else?

I am planning to add those in due time. Paluchpeter 16:39, 28 December 2006 (UTC)[reply]


Maximum EIGRP Hop Count

I've seen a lot of conflicting arguments regarding what the actual maximum hop count for EIGRP is, to the point where I was watching a snippet of a video from Train Signal on EIGRP and the instructor, Chris Bryant CCIE #12933, mentioned that he's seen arguments on the net about it (even discrepancies in Cisco's own documentation). In the video, he shows that the router itself claims that the maximum hop count is 100, not 220; he runs the "show ip protocols" command on a Cisco 2500 I believe:

R1#show ip protocols 

Routing Protocol is "eigrp 100"
 Outgoing update filter list for all interfaces is not set
 Incoming update filter list for all interfaces is not set
 Default networks flagged in outgoing updates
 Default networks accepted from incoming updates
 EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
 EIGRP maximum hopcount 100
 EIGRP maximum metric variance 1

However, I was reading elsewhere that the default is 100, and that it could be adjusted. If the user runs 'router eigrp <AS#>' then 'metric maximum-hops', the maximum hop count can be changed from 1-255, according to IOS help:

R1#conf t

Enter configuration commands, one per line. End with CNTL/Z.

R1(config)#router eigrp 100

R1(config-router)#metric ? 

 holddown      Enable EIGRP holddown
 maximum-hops  Advertise EIGRP routes greater than <hops> as unreachable
 weights       Modify EIGRP metric coefficients

R1(config-router)#metric maximum-hops ? 

 <1-255>  Hop count

R1(config-router)#metric maximum-hops 255

R1(config-router)#


I suppose that this is something that should probably be checked. Daedalus01 17:11, 1 June 2007 (UTC)[reply]

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