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Date:      Sat, 19 May 2012 12:13:04 +0100
From:      Joe Holden <lists@rewt.org.uk>
To:        Sami Halabi <sodynet1@gmail.com>
Cc:        "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>
Subject:   Re: ECMP and RADIX_MPATH
Message-ID:  <4FB78040.80301@rewt.org.uk>
In-Reply-To: <CAEW%2BogZN2n4K-kMnL1jm0_rE2Yj%2Bhv=-JXqapjS9q44DWQPEHQ@mail.gmail.com>
References:  <4FB4B682.4020606@zhegan.in>	<1337276670.15253.2.camel@powernoodle-l7.corp.yahoo.com>	<B143A8975061C446AD5E29742C531723CA7886@pwsvl-excmbx-05.internal.cacheflow.com> <CAEW%2BogZN2n4K-kMnL1jm0_rE2Yj%2Bhv=-JXqapjS9q44DWQPEHQ@mail.gmail.com>

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Sami Halabi wrote:
> Hi,
> what form of load balancing it makes?
> is that apply to 8.3-R/S also?
> 
> thanks,
> Sami
> 
> On Thu, May 17, 2012 at 8:56 PM, Li, Qing <qing.li@bluecoat.com> wrote:
> 
>> It is not working properly in one case, of load balancing among physical
>> interfaces having a single prefix, all are attached to the same physical
>> link, and reaching a single first-hop router.
>>
>> The feature itself, of installing (/removing) multiple routing entries of
>> varying
>> first-hop to the same destination, and having traffic load balance among
>> the installed routes work fine.
>>
>> --Qing
>>
>>
>>> -----Original Message-----
>>> From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-
>>> net@freebsd.org] On Behalf Of Sean Bruno
>>> Sent: Thursday, May 17, 2012 10:45 AM
>>> To: Eugene M. Zheganin
>>> Cc: freebsd-net@freebsd.org
>>> Subject: Re: ECMP and RADIX_MPATH
>>>
>>> On Thu, 2012-05-17 at 01:27 -0700, Eugene M. Zheganin wrote:
>>>> The problem is that this topic lacks the documentation like totally.
>>>>  From the commit comments I understand that with RADIX_MPATH I can
>>>> use
>>>> more than one route towards the destination, but I really cannot find
>>>> anywhere the answer to the question 'will some form of balancing,
>>>> per-flow or per-packet take place'.
>>> It appears that RADIX_MPATH is currently not working properly.  See
>>> this
>>> months mail threads [stable-9] where we discussed it.
>>>
>>> http://lists.freebsd.org/pipermail/freebsd-net/2012-May/032331.html
>>>
>>> sean
If you intend to use MPATH in production have a glance at this thread 
from last year for possible problems:

http://lists.freebsd.org/pipermail/freebsd-net/2011-December/030683.html

Thanks,
J



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