Re: MS-SPring

[dimitri papadimitriou <dpapadimitriou@psg.com>]

hi huub,

Huub van Helvoort wrote:

> Hallo Dimitri,
>
> You responded to Diego:
>
> > Diego Caviglia wrote:
> >
> > > Hi Dimitri,
> > >             given the high number of MS-SPRing protected transport 
> > > network
> > > already deployed seems reasonable to me, from a Network Operator 
> > > point of
> > > view, to use at the same time MS-SPRing protection with GMPLS 
> > > restoration.
> >
> > there are already two questions here 1. is there an operational need 
> > to control such rings using GMPLS (? for instance is it effective 
> > knowing that ring based protection is mainly data plane driven ?) and 
> > 2. how to position the ring protection wrt to the LSP recovery 
> > segment/end-to-end recovery
>
> The first step in MS-Spring is indeed dataplane driven (using APS)
> but that involves only nodes adjacent to the fault.

ok, btw, is there a reason to restrict to MS/line protection ring ?

> The reconfiguration of the ring after this first switch is controlplane
> driven and concerns all nodes in the ring.

ok with this - like for other linear protection schemes the control 
plane would be involved in the provisioning

also, what about the (informational) notification to maintain the 
control plane aware about the data plane status after failure detection 
and/or after the APS operation

thanks,
- dimitri.

> Cheers, Huub.