Re: [HSSG] fault signalling
I would certainly support something like this. This would be very useful
when connecting the client interface on a DWDM transponder to a 100GE
interface on a router/switch/ADM. It might be as simple as defining
another 'ordered code set' for fault signaling, so we would now have a
total of three codes:
-LF
-RF
-AIS
The lack of such a feature at 10GE is one of the (very few) reasons that
OC192 interfaces continue to be used for this kind of interconnect.
Gary Nicholl
> -----Original Message-----
> From: Mikael Abrahamsson [mailto:swmike@SWM.PP.SE]
> Sent: Monday, September 17, 2007 4:44 PM
> To: STDS-802-3-HSSG@LISTSERV.IEEE.ORG
> Subject: [HSSG] fault signalling
>
> Hello.
>
> I am very interested in having new HSSG standard implement
> some kind of signalling equivalent to AIS, RDI etc which is
> present in SONET/SDH and which is very useful for
> fault-finding i WAN/DWDM applications where regenerators or
> transponders are used to indicate where the fault might be.
>
> Is it too early in the process to start discussing this?
> Since symbol and bit encoding is being discussed. I am under
> the impression that one could use non-data symbols out of
> 64b/66b to handle some of the signalling, thus I wanted to
> ask this early on in case this is the proper time, or if it
> should be done later.
>
> I have quite a few ideas about what could be included, even
> if it's said to be optional to include (I don't know how this
> is usually done).
>
> I am willing to try to put together a more structured list of
> suggestions if it's deemed appropriate at this time.
>
> --
> Mikael Abrahamsson email: swmike@swm.pp.se
>