[AusNOG] Fiber connectivity

[Matt Baker]

Not sure if you just got the part number wrong or maybe using the wrong part, but a WS-G5484 is not a 1000BASE-LX/LH GBIC but a 1000BASE-SX multimode GBIC.

The 1000BASE-LX/LH version is a WS-G5486





Matt Baker
Colocity Pty Ltd
Adelaide Co-location and Dedicated Servers
matt.baker at colocity.com
Ph:  (08) 8232-3250      Fx:  (08) 8227-0315






On 20/04/2012, at 1:59 PM, Qui Le wrote:

>  
> We use Mode Conditioning Cables at both end so it should work with our
> WS-G5484 transceiver 1000BASE-LX/LH long haul GBIC (singlemode or multimode) OM1 Fibre run according to Cisco.
>  
> I can see port at the Core is up but no joy at the Access switch.
>  
> As suggested , we may need a OTDR test done on the run.
>  
> Thank you all for your advises.
>  
> Qui
>  
> From: Martin Visser [mailto:martinvisser99 at gmail.com] 
> Sent: Friday, 20 April 2012 13:16
> To: Qui Le
> Cc: ausnog at lists.ausnog.net
> Subject: Re: [AusNOG] Fiber connectivity
>  
> Qui,
>  
> It might work, but you definitely need the Mode Conditioning Cable (to make sure the single mode optics in the transceiver launch down the side of the multi mode core). But you are right on the limit for a single fibre run. Each patch will add loss - and with six it all adds up. Unfortunately most enterprise network equipment is pretty much go or no-go as far as determining whether it works. You probably either need a OTDR test done on the run, or run things and 100BaseFX.
> 
> Regards, Martin
> 
> MartinVisser99 at gmail.com
> 
> 
> On 20 April 2012 10:44, Qui Le <QLe at sydneyoperahouse.com> wrote:
> We run 550m of OM1 fibre from our Cisco core to a remote site over 6 hops included rack to rack and we can not
> seem  to get any connectivity. Using both Cisco GLC-LH-SM transceivers at both the Core & access Switch.
>  
> Does anyone know if there are hops limitations for long haul fibres.
>  
> Any advise is much appreciated.
>  
> Thanks
>  
> Qui Le
> 
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