From: Scott Morris (smorris@ipexpert.com)
Date: Mon Nov 05 2007 - 11:58:12 ART
It is not a negotiated parameter as far as anything I've ever looked at/done
with it! So you could set up each side to be different, and what you may
find (a reason not to do this in real life?) is that each side's decisions
may decide to tie up the same circuit more than another instead of balancing
and sharing how you may like.
But like everything, in the lab we do what we are told to do! In real life,
we configure, monitor, analyze and possibly configure some more!
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M
#153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
VP - Technical Training - IPexpert, Inc.
IPexpert Sr. Technical Instructor
A Cisco Learning Partner - We Accept Learning Credits!
smorris@ipexpert.com
Telephone: +1.810.326.1444
Fax: +1.810.454.0130
http://www.ipexpert.com
_____
From: Rich Collins [mailto:nilsi2002@gmail.com]
Sent: Monday, November 05, 2007 9:19 AM
To: dara tomar
Cc: Joseph Brunner; Scott Morris; Tarun Pahuja; groupstudy
Subject: Re: Basics- Etherchannel load-balancing
So if I understand correctly the initiating switch "has the say" in how the
load-balancing gets decided (it doesn't have to match a certain reciprocal
arrangement on the other side)?
Looking through various exercises it seemed to me that only one Switch on
the etherchannel was ever configured and the other side was always left in a
default.
-Rich
On 11/4/07, dara tomar <wish2ie@gmail.com> wrote:
Hi Joseph,
The behavior of traffic flow described by you is the default when CEF based
switching is enabled i.e, this is flow based switching that is taking place
here for 3550 when src-mac is used!!!
Regards,
Dara
On Nov 4, 2007 6:17 PM, Scott Morris < smorris@ipexpert.com
<mailto:smorris@ipexpert.com> > wrote:
Like routing, it's a one-way decision. The other side will not care even if
configured differently.
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M
#153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
VP - Technical Training - IPexpert, Inc.
IPexpert Sr. Technical Instructor
A Cisco Learning Partner - We Accept Learning Credits!
Telephone: +1.810.326.1444
Fax: +1.810.454.0130
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto: nobody@groupstudy.com
<mailto:nobody@groupstudy.com> ] On Behalf Of
Tarun Pahuja
Sent: Saturday, November 03, 2007 4:36 PM
To: Rich Collins
Cc: groupstudy
Subject: Re: Basics- Etherchannel load-balancing
Rich,
The choice depends on a lot of factors namely, what platform?
what version of IOS? Load balancing features supported and most important of
all, what are you trying to achieve.
For example, If you are backing up to a server and would like to perfom
etherchannel load balancing in intermediate switches it would not be a good
idea to use the destination Mac or IP, it would be more optimal to use
source ip address or Mac. Basically, the IOS uses a Hashing algorithm to
find out the port it should send the packet to, similar inputs to the
hashing algorithm would give the same port number.
HTH,
Tarun
On 11/3/07, Rich Collins <nilsi2002@gmail.com> wrote:
> Hi,
>
> After reading some of the documentation I think that I am still
> missing some basics. For example:
>
> many hosts --SW1 ===== Sw2 ---server
> (on same VLAN)
>
> With 3550's I suppose you would want src-mac on SW1 and then do you need
the
> reciprocal on SW2 (dst-mac)? Also a big question - what about a 3560 on
> one side and a 3550 on the other. What type of mixed matrices would work
or
> are suggested? i.e src-mac and dst-ip
>
> thanks
> Rich
>
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