The MPLS WG Archive

[Mark Stewart <Mstewart@nexen.com>]

Yakov Rekhter wrote:

> Mark,
>
> > The concept of jointly routing primary and protection paths has been
> > well accepted by Bell heads looking at optimizing their networks for a
> > long time. Part of the reason for this is the assumption that protection
> > path(s) must also be conformant to the same SLA as the primary path, and
> > joint routing is the most likely to achieve this.
> >
> > This does not of course address your concerns about race conditions at
> > connection establishment. But joint routing is guaranteed to produce a
> > solution not worse than independent routing, and results in a lower
> > commitment of network resources.
>
> Moreover, in certain cases independent routing would not be able to
> produce a solution at all, while joint routing would be able to produce
> a solution.
>
> Yakov.
>

very true.

As a general question though is anyone aware what work has been done on how
best to recover should one of the above race conditions prevent the
establishment of one of the paths?

ciao

Mark