[AusNOG] Fiber connectivity

[Matthew Moyle-Croft]

Or loop back toward switch at each patch point to see if link goes up.



On 20/04/2012, at 3:45 PM, "Darren Ward (darrward)" <darrward at cisco.com>
wrote:

Can you test by moving the switch or another switch closer?

Test hop by hop in case of bad patch/connector?

Sent from my iPhone

On 20/04/2012, at 2:30 PM, "Qui Le" <QLe at sydneyoperahouse.com> 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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