RE: EIGRP Maximum-hop

From: Timothy Chin (Tim@1c-solutions.com)
Date: Sun Nov 30 2008 - 10:49:49 ARST


The maximum definable hop count is 255 but 224 hops is the true limit.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Oleg Konovalov
Sent: Sunday, November 30, 2008 5:05 AM
To: Cisco certification
Subject: EIGRP Maximum-hop

Hi all, I have question about EIGRP maximum hops, based on
http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080
094cb
7.shtml we can set up maximum 220 hops, based on some CCNP materials it
is
224. I test it on my router and 255 hops was OK.

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
  Redistributing: eigrp 100
  EIGRP NSF-aware route hold timer is 240s
  Automatic network summarization is in effect
  Maximum path: 4
  Routing for Networks:
  Routing Information Sources:
    Gateway Distance Last Update
  Distance: internal 90 external 170

Then I have changed metric maximum-hops

Router(config)#router eigrp 100
Router(config-router)#metric maximum-hops 255
Router(config-router)#end
Router#sh 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 255
  EIGRP maximum metric variance 1
  Redistributing: eigrp 100
  EIGRP NSF-aware route hold timer is 240s
  Automatic network summarization is in effect
  Maximum path: 4
  Routing for Networks:
  Routing Information Sources:
    Gateway Distance Last Update
  Distance: internal 90 external 170

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