From: Zouta oxpf (zouta.oxpf@gmail.com)
Date: Thu Sep 15 2005 - 18:36:48 GMT-3
Can EIGRP perform unequal cost load-balancing without the use of variance?
If so, how?
Regards
ZO
On 9/15/05, henryd31@comcast.net <henryd31@comcast.net> wrote:
>
> I wonder if the responses here went a bit too far off what the guy was
> asking for.
> The question is not clear in itself, because you don't need to configure
> variance in order to achieve load balancing. So, either he was confused
> thinking
> variance would be needed as a main attribute to enable load balancing, or
> he understands what variance achieves and is asking for other ways to get
> load balancing achieved that does not use variance, and in this case he's
> asking for unequal load balancing. If the former, the answer is in here
> already, if
> the latter then you have the options available to manipulate metrics such
> as bandwidth
> and delay, use offset lists, maybe even manipulate the K values...
>
>
> > bandwidth is definitlly going to be the main way to achieve
> load-balancing.
> > if the paths are equal metric you're set. if not, use the bandwidth
> > command. there may be a circumstance where you cannot use the bandwitch
> > command so you'll have to use varience. if you cannot use varience then
> > you'll have to manipulate the delay (there is a good IE lab that
> > illustrates this........i won't pretended to fully understand this
> aspect
> > yet).
> >
> > so
> > 1) bandwitch already equal - do nothing, unless you want more than 2
> path,
> > then issue "manimum-paths X"
> > 2) bandwidth is not equal - use bandwitch command, or use varience
> command
> > 3) if your not allowed to use variance, then use delay
> >
> >
> > Regards,
> >
> > John D. Matus
> > Technical Support / PAS
> > Fujitsu Consulting
> > 626-568-7716
> > John.Matus@tokiom.com
> >
> >
> >
> > Ed Tan
> > <tytanx@gmail.com
> > > To
> > Sent by: ccielab@groupstudy.com
> > nobody@groupstudy cc
> > .com
> > Subject
> > Re: EIGRP load balance
> > 09/15/2005 11:39
> > AM
> >
> >
> > Please respond to
> > Ed Tan
> > <tytanx@gmail.com
> > >
> >
> >
> >
> >
> >
> >
> > Hi All,
> >
> > Below are the conclusions from my testing and I welcome any input.
> >
> > The key is to adjust the metric/cost to "equal-metric" path if variance
> > command is not allow for EIGRP unequal-cost path load balancing.
> >
> > 1) Bandwidth command under EIGRP interface - if the path calculation is
> not
> > too complex, this is the easiest!
> > 2) Offset-list command under router eigrp - use it when you need more
> > advance route control eg ACL, or when the bandwidth calculation is too
> > complicated (+- the metric definitely easier than */+)
> > 3) If redistribution involved, tune the metric during the
> redistribution.
> >
> > Thanks again for your time.
> > Ed.
> >
> >
> > On 9/14/05, John Matus <john_matus@hotmail.com> wrote:
> > >
> > > i guess i should have said "equal-metric" paths, and i probably should
> > > have
> > > read scott's response first :)
> > >
> > >
> > > >From: "John Matus" <john_matus@hotmail.com>
> > > >Reply-To: "John Matus" <john_matus@hotmail.com>
> > > >To: swm@emanon.com, tytanx@gmail.com, ccielab@groupstudy.com
> > > >Subject: RE: EIGRP load balance
> > > >Date: Wed, 14 Sep 2005 19:38:17 +0000
> > > >
> > > >yes, by default eigrp does load-balance for equal-cost paths. it's
> the
> > > >unequaual cost paths you have to worry about....
> > > >
> > > >
> > > >>From: "Scott Morris" <swm@emanon.com>
> > > >>Reply-To: "Scott Morris" <swm@emanon.com>
> > > >>To: "'Ed Tan'" <tytanx@gmail.com>, "'Group Study'"
> > > >><ccielab@groupstudy.com>
> > > >>Subject: RE: EIGRP load balance
> > > >>Date: Wed, 14 Sep 2005 09:07:28 -0400
> > > >>
> > > >>So... Ask yourself some questions.
> > > >>
> > > >>1. What does the variance command do?
> > > >>2. If I understand what the variance command does, where do I find
> the
> > > >>information that it would use to influence its decisions?
> > > >>3. Once this is found, you have the answer to what needs to change
> (and
> > > >>which direction) in order to make this work. Go to 'router eigrp 1'
> and
> > > >>use
> > > >>the '?' command to assist in looking for things that will manipulate
> > > what
> > > >>you want to.
> > > >>
> > > >>Post your findings and reasons and we'll go from there!
> > > >>
> > > >>DocCD may assist as well.
> > > >>
> > > >>Scott
> > > >>
> > > >>-----Original Message-----
> > > >>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > > Ed
> > > >>Tan
> > > >>Sent: Wednesday, September 14, 2005 2:52 AM
> > > >>To: Group Study
> > > >>Subject: EIGRP load balance
> > > >>
> > > >>Hi group,
> > > >>
> > > >>I am just wondering is it anyway to configure EIGRP load balance
> > without
> > > >>using "variance" command?
> > > >>
> > > >>TIA,
> > > >>Ed
> > > >>
> > >
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