[AusNOG] Fiber connectivity

[Kevin Harm]

And be aware of the speed / distance limitations

For OM1, typical transmission speed and distance limits are 100 Mbit/s for distances up to 2 km (100BASE-FX<http://en.wikipedia.org/wiki/100BASE-FX>), 1 Gbit/s to 220-550 m (1000BASE-SX<http://en.wikipedia.org/wiki/1000BASE-SX>), and 10 Gbit/s to 300 m (10GBASE-SR<http://en.wikipedia.org/wiki/10_Gigabit_Ethernet#10GBASE-SR>)

And, if each hop that you refer to is a patching point, you will introduce loss along the way.

Kev


From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Christopher Pollock
Sent: Friday, 20 April 2012 10:55 AM
To: Qui Le
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Fiber connectivity

Sounds like you're using single mode transceivers with multimode fibre there.  Since SM optics rely on total internal reflection and multimode is basically bendy plastic, that will probably never work.  You need some multimode SX SFPs.

Cheers,
--
Christopher Pollock,
io Networks Pty Ltd.
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In-house, Outsourced.


On Fri, Apr 20, 2012 at 10:44 AM, Qui Le <QLe at sydneyoperahouse.com<mailto: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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