From: ccie2be (ccie2be@nyc.rr.com)
Date: Fri May 09 2003 - 14:25:50 GMT-3
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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