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Re: [Sigtran] Number of links towards a DPC (ITU)

"Brian F. G. Bidulock" <bidulock@openss7.org> Mon, 17 June 2013 16:02 UTC

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Date: Mon, 17 Jun 2013 10:02:24 -0600
From: "Brian F. G. Bidulock" <bidulock@openss7.org>
To: "Nemana, Satya" <snemana@sonusnet.com>
Message-ID: <20130617160224.GA23895@openss7.org>
Mail-Followup-To: "Nemana, Satya" <snemana@sonusnet.com>, David Laight <David.Laight@ACULAB.COM>, Arvind Kumar <arvindverma77@gmail.com>, "sigtran@ietf.org" <sigtran@ietf.org>
References: <CAE4qXDFfy+7BycUNrWNGm=Lo4U=WMZH9FDjw1kqWy71nKNbEhw@mail.gmail.com> <20130614215503.GA966@openss7.org> <AE90C24D6B3A694183C094C60CF0A2F6026B7291@saturn3.aculab.com> <A4C75474DC72BC44A5517224ED0604C5021E01E8@USMA-EX-MB2.sonusnet.com>
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Cc: "sigtran@ietf.org" <sigtran@ietf.org>, Arvind Kumar <arvindverma77@gmail.com>
Subject: Re: [Sigtran] Number of links towards a DPC (ITU)
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Satya,

Nemana, Satya wrote:                    (Mon, 17 Jun 2013 15:27:13)
> My 2 cents.
>
> The ITU spec may not say this, but why not do this.
>
> 1) Use the LSB to select the linkset within a combined linkset.

So, XXX0 goes to one linkset and XXX1 goes to the other.

> 2) Once the Linkset is selected, use the full SLS value to select one
>    of the links in the linkset.

On the first linkset, the entire SLS is XXX0.  There are only eight
values here.  On the second linkset, the entire SLS is XXX1.  There
are only eight values here.  So, 8 links per linkset, 16 links per
combined linkset.

> In this way, we can still have 16 links in each linkset and combined
> linkset can have 32 links and still loadshare across all the links.

Nope.  See above.

> Each linkset will still have 16 of the SLS values so, there won't be
> any issues of un-even loadsharing even if some links go down in the
> route to the final destination.

Each linkset has 8 values.

-- 
Brian F. G. Bidulock
bidulock@openss7.org
http://www.openss7.org/

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