RE: LMP revision 04

[Kireeti Kompella <kireeti@juniper.net>]

Hi Greg,

On Mon, 12 Aug 2002, Bernstein, Greg wrote:

> Hi Bert, Kireeti, and Yangguang,
> Here's my answer from the perspective of SONET/SDH (for other technologies I
> might have different answers):
>
> a. control channel management -- To me this is just IP connectivity between
> control entities.  I don't use this for "ultra fast" restoration (have
> separate signaling mechanisms via AIS, RDI and K bytes) hence I was counting
> on IP's inherent resilliance/recovery here.  To set up "control channels" I
> use a discovery mechanism(s).  Hence I don't see much use for this.

Is it possible for a network that uses SONET to transport data to use an
Ethernet for OSPF adjacencies and RSVP messages?

> b.  Link Property correlation -- This is functionality that I'd use.  The
> link bundling example is just one case.  A problem does come up in that I'd
> like to use it for technology specifics too.  An example that I frequently
> use for this type of functionality in promoting SDH interoperability is in
> the configuration of 1:N SDH protection groups.
>
> c.  Link connectivity verification -- This is where the argument concerning
> "discovery" comes in again.  SDH contains lots of hooks for this at many
> layers (note that SONET/SDH has multiple layers in and of itself).
> Don't see this of much use for SONET/SDH as it stands.
>
> d.  Fault management -- Wouldn't touch it.  SONET/SDH has much more
> elaborate a faster mechanisms.

Thanks, useful to know.

> Process questions for Bert and </chair> Kireeti </chair>: (a) all this
> discussion is interesting but where are we in the process? In particular
> Kireeti in a previous mail explained that the comment period was over and
> that these discussions were just as a "courtesy" to me. (b)Has "rough
> consensus" been obtained?  If so we can close these discussions.  Most of
> what I've been reviewing here for folks is standard SONET/SDH. Note however
> that the transport network has many layers and that most of the optically
> astute authors of LMP have be concerned with either transparent optical or
> nearly transparent optical (below the SONET line layer).

Good question.  I've asked the ADs the same.

Kireeti.