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[IP-Optical] RE: Optical link bundling. Was Re: DraftMinutes From Pittsburgh

  • From: "S. Chkaravorty" <sc12@erols.com>
  • Date: Mon, 23 Oct 2000 20:45:47 -0400
  • CC: jls@research.att.com, ip-optical@lists.bell-labs.com, mpls@UU.NET

Kireeti,


Kireeti Kompella wrote:

>
> Are you (or others) proposing the mechanisms to do this in the
> UNI/GMPLS framework?
>

Why is that so important?

>
> > The heuristics to simultaneously route a number of circuits simultaneously
> > subject to diversity constraints essentially require zillions of calls
> > to a Dijkstra algorithm and so don't seem to lend themselves to incorporation
> > in the control plane.
>
> In the IP world, I see the use for simultaneous set up of a small
> number of disjoint paths, basically, a primary and one or more
> backups for an LSP.  So, this may not be an issue.  What is the
> requirement driving having lots of simultaneous diverse paths in
> the telephony world?
>

Very simple.  It is an age old practice in all transmission networks to provide
route diversity for failure back-up and peak traffic conditions.