Re: 295-s12

Hi Ashwin,

You should keep the discussion going on list. I've Cc'd the list back in.

On Tue, May 26, 2009 at 4:39 PM, Ashwin Iyer <ash.iyer_at_gmail.com> wrote:
> hi dale,thank u fro ur interest.i the issue is the optics are 100baselx and
> it seems they dont have auto-neg facility when connected to 1000basesx,when
> i looped them back to back they worked well.i changed the optics to single
> and multimode,both did not work.So it boils down to the autoneg capability
> of the optics

Are you saying to tried to connect one device with a 100BASE-LX
interface, to another device with a 1000BASE-SX interface?

As you mention above, 1000BASE-X optics don't do 10/100 so there is
speed other than 1000Mbps to operate at or negotiate down to.

Apart from the speed and cable type mismatch, I don't think you
would've had much success with that configuration because the optics
operate at different wavelengths (1310nm for 100BASE-LX and 850nm for
1000BASE-SX).

I know there are some SMOF optics that have wideband receivers in them
that allow, say, 1000BASE-LX to connect to 1000BASE-ZX, but I'm pretty
sure you'll be out of luck with 100BASE-LX to 1000BASE-SX).

Disclaimer: I'm not a fibre optics expert by any stretch of the
imagination. I'm just saying there's more to it than lack of auto-neg.

cheers,
Dale

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Received on Tue May 26 2009 - 17:01:00 ART