Hi david. Theses are all lc connectors. I'm being told that we should tear apart the duplex connectors and swap the cables, but I find that a bit absurd.
Adam David Nolan <[email protected]> wrote: >Adam, > >Are these SC or LC connectors? In my experience the fiber on most SC >patch cables can be swapped at the connector, but with LC the fiber >has to be swapped on the backside of the patch panel. > >-David > >On Thu, Oct 11, 2012 at 1:05 PM, Adam Levin <[email protected]> wrote: >> I've got a curious issue in a new small datacenter lab, and I'm >curious >> about it. >> >> We just moved our lab to a new facility. In the old lab, we used >> top-of-rack switches (Cisco 9148) with inter-switch links back to a >Cisco >> MDS 9222 core. All of the hosts plugged into the 9148s, and the >storage >> plugged into the core, and all was Good In The Kingdom. >> >> In the new facility, all of the hosts (and some storage) plugs into >> lightguide fibre patch panels, which run back to a rack that has the >9148s >> and the 9222s. >> >> Here's the problem: when we run cables from HBAs (in hosts or in >storage >> systems) direct to the switches, the Tx and Rx are correct. When the >> lightguide patch is in the middle, the Tx and Rx are reversed. >> >> The lightguide panels are straight passthrough, as are the cables, >which are >> standard FC cables. So, of course with the lightguide in the middle, >the Tx >> and Rx would naturally get mixed. In other words, a duplex cable >plugged >> into ports 1/2 on the lightguide would end up reversing the light >paths, >> which of course causes problems. >> >> What I'm not sure about is what is normal for this configuration? Do >people >> normally buy "crossover" FC cables to use with a patch panel, or do >people >> buy proper patch panels which "uncross" the streams? >> >> Thanks! >> -Adam >> >> _______________________________________________ >> Tech mailing list >> [email protected] >> https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech >> This list provided by the League of Professional System >Administrators >> http://lopsa.org/ >> >_______________________________________________ >Tech mailing list >[email protected] >https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech >This list provided by the League of Professional System Administrators > http://lopsa.org/
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