[j-nsp] MX - DWDM no link

[Julien Goodwin]

On 07/11/12 21:30, Luca Salvatore wrote:
> The fibre run is about 40Km point to point.  There are other people already using it on their own frequencies at 10Gb so I know it works.
> While i'll admit my knowledge about DWDM stuff is not great, I do have plenty of experience in the routing and switching space - just not much with the long haul fiber stuff.

You'd also want to know the power loss (dB) to confirm loss rating.

With high power optics you also have the possibility of permanent damage
if you loop them back at short range, if you tried this earlier you may
already have destroyed them.

I presume this is all going into a passive mux or transponder-less
ROADM? If its going into a transponder you usually use SX or multimode
optics.

I'm also pretty sure that tunables only work on MIC ports on MX80 and
derivatives, not the fixed ports, here's one ref confirming:

http://labs.spritelink.net/juniper-mx-and-tunable-xfps

But this is apparently fixed in a JunOS new enough for the "real" MX10's.

...

> mx10-1> show interfaces diagnostics optics xe-1/2/0
> Physical interface: xe-1/2/0
>     Laser bias current                        :  20.861 mA
>     Laser output power                        :  1.4120 mW / 1.50 dBm
>     Module temperature                        :  32 degrees C / 89 degrees F
>     Laser rx power                            :  0.0000 mW / - Inf dBm

That's snipped right? IIRC you should see the wavelength listed here,
but I don't have a tunable to hand (yay! excuse to buy a lab toy, shame
I have no money for such)


-- 
Julien Goodwin
Studio442
"Blue Sky Solutioneering"

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