Jump to content

Talk:Enhanced Interior Gateway Routing Protocol

Page contents not supported in other languages.
From Wikipedia, the free encyclopedia
This is an old revision of this page, as edited by Paluchpeter (talk | contribs) at 16:50, 12 July 2007 (Answering to a comment). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Talk page archive

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 This was the 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]

Division vs. multiplication error in "multiple metrics" section

Currently, in the "Multiple metrics" section of this article, the following sentences appear:

Analogously, the interface delay is a configurable static parameter expressed in units of tens of microseconds. Dividing this interface delay value by 10 yields a delay in units of microseconds that is used in the weighted formula.

I believe that some part of these sentences is incorrect. If one has a measurement in tenths of microseconds, he should multiply by 10 to obtain the measurement in microseconds. I considered performing a simple edit to change "dividing" to "multiplying," but I figured I'd post something here first to make sure that the true error did not lie somewhere else. If there is no further comment on this issue within the next few days, I will go ahead and make the edit.

Douglyuckling 21:58, 17 June 2007 (UTC)[reply]

A good point. However, the meaning of the sentence is as follows: The delay is configured using the "delay N" interface level command. The N is the count of tens of microseconds. For example, "delay 1" means that the delay is 1*10 = 10 microseconds. Notice that I am talking about tens, not tenths of microseconds.

Paluchpeter 16:50, 12 July 2007 (UTC)[reply]

Retrieved from "https://en.wikipedia.org/w/index.php?title=Talk:Enhanced_Interior_Gateway_Routing_Protocol&oldid=144212862"