RE: shared mesh restoration - e2e recovery signaling draft

[Dimitri.Papadimitriou@alcatel.be]

ok you are referring to the case when the LSP reverts back to the primary
same business but instead make use of the "Notify Error/LSP Recovered" 
code

this is documented in section 12 (last part)

thanks,
- dimitri.




"Payam Torab" <ptorab@lopsys.com>
Sent by: owner-ccamp@ops.ietf.org
26/07/2006 00:47
 
        To:     Dimitri PAPADIMITRIOU/BE/ALCATEL@ALCATEL
        cc:     <ccamp@ops.ietf.org>, "'Dave Walters'" 
<dwalters@lopsys.com>, <owner-ccamp@ops.ietf.org>
        Subject:        RE: shared mesh restoration - e2e recovery 
signaling draft


The question is availability of a mechanism once the shared restoration 
path
becomes available again - we would like to let the other ingress nodes 
know
their LSPs are no longer vulnerable (if they have not picked a different
restoration path already); Referring to the scenario on page 20 of the
draft, it is desirable for node E to notify H that the shared restoration
path H-E-F-G-K is available again.

A notify message with the error code/sub-code "Notify Error/LSP Recovered"
could be a good solution, but it does not seem to be used by the draft in
this context.

Thanks,
Payam


> -----Original Message-----
> From: owner-ccamp@ops.ietf.org 
> [mailto:owner-ccamp@ops.ietf.org] On Behalf Of 
> Dimitri.Papadimitriou@alcatel.be
> Sent: Tuesday, July 25, 2006 6:25 PM
> To: Payam Torab
> Cc: ccamp@ops.ietf.org; 'Dave Walters'; owner-ccamp@ops.ietf.org
> Subject: Re: shared mesh restoration - e2e recovery signaling draft
> 
> 
> hi 
> 
> your question is in a shared mesh case, are the ingress nodes (N-1) 
> notified about the use of the recovery path by the remaining 
> ingress node 
> part of the same shared mesh group
> 
> answer is yes - you can notify the other ingresses by sending 
> a PathErr of 
> Notify msg - the error code defined for this case is "Notify 
> Error/LSP 
> Locally Failed" - 
> 
> much thanks,
> - dimitri.
> 
> 
> 
> 
> 
> "Payam Torab" <ptorab@lopsys.com>
> Sent by: owner-ccamp@ops.ietf.org
> 26/07/2006 00:11
> 
>         To:     <ccamp@ops.ietf.org>
>         cc:     "'Dave Walters'" <dwalters@lopsys.com>
>         Subject:        shared mesh restoration - e2e 
> recovery signaling 
> draft
> 
> 
> In the e2e recovery signaling draft 
> (draft-ietf-ccamp-gmpls-recovery-e2e-signaling-03.txt), there is a 
> procedure defined for a node on the shared restoration path to notify 
> other nodes regarding the working LSPs that become vulnerable 
> as a result 
> of switching to the shared restoration path.
> 
> It seems there is a similar need to notify these nodes once 
> the shared 
> restoration path becomes available again. Is this mechanism defined 
> anywhere?
> 
> Thanks,
> Payam
>