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RE: FEC / Load Balancing on Ethernet
- To: "'Erez Doron'" <erez(at-nospam)savan.com>, Orna Agmon <agmon(at-nospam)techunix.technion.ac.il>
- Subject: RE: FEC / Load Balancing on Ethernet
- From: "Hen, Shmulik" <shmulik.hen(at-nospam)intel.com>
- Date: Sun, 16 Dec 2001 11:38:28 +0200
- Cc: Schlomo Schapiro <schapiro(at-nospam)mobileye.com>, Linux-IL Mailing List <linux-il(at-nospam)linux.org.il>
- Delivered-To: linux.org.il-linux-il@linux.org.il
- Sender: linux-il-bounce(at-nospam)cs.huji.ac.il
Depends on the selected teaming mode!
If you choose ALB, the switch doesn't have to match to configuration but you
only get balancing on the Tx (Rx is done on one adapter only). If you choose
FEC, the switch must be configured to EtherChannel (or trunk or link
aggregation - depends on the vendor) over all the ports connected to the
members of the team. This way you get load balancing on both Rx and Tx. The
speed being reported is only a calculation of the maximum speed that can be
achieved in each mode providing they work in full duplex (num of members X
adapter's top speed). You can use NetPerf to get accurate performance
measurements.
-----Original Message-----
From: Erez Doron [mailto:erez@savan.com]
Sent: Thu, December 13, 2001 4:21 PM
To: Orna Agmon
Cc: Schlomo Schapiro; Linux-IL Mailing List
Subject: Re: FEC / Load Balancing on Ethernet
i think that the only issue is if the remote side supports load balancing or
not !
regards
erez.
Orna Agmon wrote:
> i know of someone who used 4 100Mb cards on the same box
> (dual CPU), and he claims it to be successful.
> not my personal experiance, though.
>
> Orna.
>
> On Thu, 13 Dec 2001, Schlomo Schapiro wrote:
>
> > Hi,
> >
> > I got myself an Intel 100 Server Adapter and I put together this with
> > another normal Intel 100 and a HP 4000 switch to do load balancing. It
> > seems to work well and the interface claims to do 200MBit.
> >
> > The problem is that with all my test I did it seems to me that it
doesn't
> > really pass 200MBit but only 100MBit (I copied /dev/null via netcat two
> > one,two,three other machines and I never got more than 12MB total).
> >
> > Does anybody else use such a setup ? I would like to swap experience.
> >
> > Schlomo
> >
> > PS: The Server card is just 30$ more expensive and you need just one to
> > make a team.
> >
> > --
> > Schlomo Schapiro
> > Senior System Administrator
> > MobilEye Vision Technologies Ltd.
> >
> > 24 Mishol Hadkalim St., Jerusalem, Israel
> > Telephone: + 972-2-586-6989 Ext. 131
> > Mobile: + 972-55-767898
> > Fax: + 972-2-586-7720
> >
> > email: schapiro@mobileye.com
> > WWW: http://www.mobileye.com
> >
> >
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> >
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