Re: [Pce] Is there any activity related to PCE graceful restart?

Hi Sasha,

Since you pointed stateful PCE specifically, the draft talks about what to
do during a session restart. [
https://tools.ietf.org/html/draft-ietf-pce-stateful-pce-19#section-5.6]

There is another draft that talks about optimizing it -
https://datatracker.ietf.org/doc/draft-ietf-pce-stateful-sync-optimizations/

Note that we also have re-delagation, which would try to find another
active stateful PCE to take over control -
[https://tools.ietf.org/html/draft-ietf-pce-stateful-pce-19#section-5.7.5]

As Adrian asked, do you have something else in mind when you say GR?

Regards,
Dhruv

On Sun, Jun 18, 2017 at 9:12 PM, Alexander Vainshtein <
Alexander.Vainshtein@ecitele.com> wrote:

> Re-sending with the correct WG mailing list address…
>
>
>
> Regards,
>
> Sasha
>
>
>
> Office: +972-39266302
>
> Cell:      +972-549266302
>
> Email:   Alexander.Vainshtein@ecitele.com
>
>
>
> *From:* Alexander Vainshtein
> *Sent:* Sunday, June 18, 2017 6:41 PM
> *To:* 'jonathan.hardwick@metaswitch.com' <jonathan.hardwick@metaswitch.com>;
> 'jpv@cisco.com' <jpv@cisco.com>; 'julien.meuric@orange.com' <
> julien.meuric@orange.com>
> *Cc:* 'pce@ietf.prg' <pce@ietf.prg>; Michael Gorokhovsky <
> Michael.Gorokhovsky@ecitele.com>; Marina Fizgeer <
> Marina.Fizgeer@ecitele.com>; Alexander Ferdman <
> Alexander.Ferdman@ecitele.com>
> *Subject:* Is there any activity related to PCE graceful restart?
>
>
>
> Hi all,
>
> My colleagues and I tried to find any work in the PCE WG related to PCEP
> graceful restart.
>
> So far, we did not succeed. This could mean one of the following:
>
> -          Our search did not go deep enough. In this case pointers to
> any specific documents would be highly appreciated
>
> -          Such work does not exist because (for some reason) it is not
> required. This looks problematic to me, especially if we deal with a
> stateful  active PCE and the path computed by the PCE was implemented using
> Segment Routing (so that only the head end of the computed path is aware of
> the path). However, I could have missed something obvious, and any
> clarifications would be highly appreciated
>
> -          Such work is required but, so far, nobody has taken care of
> it. The implications are obvious:-(.
>
>
>
> Your feedback would be highly appreciated.
>
>
>
> Regards, and lots of thanks in advance,
>
> Sasha
>
>
>
> Office: +972-39266302
>
> Cell:      +972-549266302
>
> Email:   Alexander.Vainshtein@ecitele.com
>
>
>
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