nanog mailing list archives
Re: Range using single-mode SFPs across multi-mode fiber
From: Chuck Anderson <cra () WPI EDU>
Date: Wed, 14 Dec 2011 22:33:01 -0500
On Wed, Dec 14, 2011 at 10:02:58PM -0500, oliver rothschild wrote:
Thanks to all who responded to my clumsy first question (both on matters of etiquette and technology). The group I work with (we are a small project acting as a last mile provider) was in the midst of deploying this solution when I posed the question. We put the single mode Juniper SFPs (LX) on to a run of approximately 1670 meters. We successfully established a 1G ethernet connection. Testing to date has been meager, but shows that the link is viable. Under significant load there is some minor packet loss. Since the link far exceeds the amount of data it required, we have decided to continue using it. Interestingly neither interface showed any physical errors.
Technically you should be using offset-launch "mode conditioning" patch cords at each end when running LX over multimode fiber. I had been lucky with not using them for many years on 62.5/125 (OM1) multimode (and just started doing so again, albiet only for OOB/non-production traffic use). I believe my longest link was/is around 1 km. http://www.cisco.com/en/US/prod/collateral/modules/ps5455/white_paper_c11-463677.html
Current thread:
- Range using single-mode SFPs across multi-mode fiber oliver rothschild (Dec 14)
- Re: Range using single-mode SFPs across multi-mode fiber Chuck Anderson (Dec 14)
- Re: Range using single-mode SFPs across multi-mode fiber Keegan Holley (Dec 14)
- Re: Range using single-mode SFPs across multi-mode fiber Mark Foster (Dec 14)
- Re: Range using single-mode SFPs across multi-mode fiber Keegan Holley (Dec 14)
- Re: Range using single-mode SFPs across multi-mode fiber Chuck Anderson (Dec 14)
- Re: Range using single-mode SFPs across multi-mode fiber Oliver Rothschild (Dec 15)
- Re: Range using single-mode SFPs across multi-mode fiber Justin M. Streiner (Dec 15)
- RE: Range using single-mode SFPs across multi-mode fiber Holmes,David A (Dec 15)
- Re: Range using single-mode SFPs across multi-mode fiber Mark Foster (Dec 14)