From: Brian Dennis (brian@labforge.com)
Date: Fri May 09 2003 - 15:41:15 GMT-3
No one can recommend to you an accurate percent if we don't know for one
how many EIGRP routes you have and how stable your network is. Secondly
do you have a bunch of 56k lines or OC3's. 50 percent of an OC3 line
should be plenty for any network ;-)
Lastly why do you think you need to alter the default anyways? Are you
seeing problems with EIGRP?
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
Director of CCIE Training and Development - IPexpert, Inc.
Mailto: brian@ipexpert.net
Toll Free: 866.225.8064
Outside U.S. & Canada: 312.321.6924
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie2be
Sent: Friday, May 09, 2003 10:26 AM
To: Group Study
Subject: Eigrp bandwidth requirements
Hi all,
I'm trying to understand the true need for the Eigrp command, "ip
bandwidth-percent eigrp".
I know that, by default, Eigrp won't use more than 50 % of the bandwidth
available on the link, and I also know that Eigrp, by it's design, uses
very
little bandwidth to operate - periodic Hello's and update, response, and
query
packets as needed.
So, here's the dilemma: since Eigrp doesn't need alot of bandwidth to
operate, but won't operate correctly if it doesn't have the bandwidth it
requires, what practical purpose does the above command serve?
If the percentage set with the above command is more than Eigrp needs to
operate, it's not doing anything.
If the percentage set is less than Eigrp needs, eigrp won't operate
correctly.
Now, assuming the above command does have a practical function, how can
good
percentage values to use be figured out? If it's good to limit Eigrp to
50%
of the bandwidth ( the default value), wouldn't it be better to limit
Eigrp to
40%? If so, then why not 30%?
In other words, what's the tradeoff of limiting Eigrp's bandwidth
consumption?
And, what's the criteria I should use to determine the optimum amount of
bandwidth Eigrp should be allowed to have?
Thanks in advance, Jim
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