[149022] in North American Network Operators' Group
Re: LX sfp minimum range
daemon@ATHENA.MIT.EDU (Steven Tardy)
Fri Jan 27 11:45:30 2012
Date: Fri, 27 Jan 2012 10:45:36 -0600
From: Steven Tardy <sjt5@its.msstate.edu>
To: nanog@nanog.org
In-Reply-To: <CAEGdXrMo7De6jWpnfv-t+BbwrZ7_eXp56L6cy+TEv3x1G_KfAw@mail.gmail.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 01/26/12 16:33, Pierre-Yves Maunier wrote:
> LX can work on both.
>
>
> It can happends that SX works on singlemode but it can fail anytime.
>
> LX over multimode fibre is documented on Cisco SFP/GBICs datasheets.
>
> http://www.cisco.com/en/US/products/hw/modules/ps4999/products_tech_note09186a00807a30d6.shtml
>
> Cisco 1000BASE-LX/LH SFPGLC-LH-SM1SFP-GE-L2Operates on standard single-mode
> fiber-optic link spans of up to 10 km and up to 550 m on any multimode
> fibers.
just because you can doesn't mean you should.
we have experience multiple cases where LX-MMF-LX works great for 3-5+ years...
then one day no longer gets link. swapping to a different fiber pair restores link.
can't remember SX-MMF-SX failing after years of service.
--
Steven Tardy
Systems Analyst
Information Technology Infrastructure
Information Technology Services
Mississippi State University
sjt5@its.msstate.edu
