With SFP+ DAC, you only really need to so with the switch in terms of compatibility. E.g. Use HP-coded transceivers.
-- Edmund White [email protected]<mailto:[email protected]> 847-530-1605 From: <[email protected]<mailto:[email protected]>> on behalf of Skylar Thompson <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Tuesday, December 8, 2015 at 3:44 AM To: Doug Hughes <[email protected]<mailto:[email protected]>> Cc: Lopsa Discussion <[email protected]<mailto:[email protected]>> Subject: Re: [lopsa-discuss] Question on 10GB cabling in a server room We've tried using SFP+ DAC cabling, but found managing compatibility to be pretty challenging. Unlike fiber, you are locked into having the same transceiver brand at both ends. We have HP switches at the core but mostly Dell servers, which proved to be problematic. Skylar On Mon, Dec 7, 2015 at 8:45 PM, Doug Hughes <[email protected]<mailto:[email protected]>> wrote: We mostly stick with SFP+ based switches and use SFP+ DAC, Active Optical, or fiber, depending upon distance. The switches are a bit cheaper, use less power, and have more connectivity options. But, if you need to leverage your existing copper infrastructure for some reason, then the RJ45 connections are probably your best bet. If you are talking about server room, I'd stick with SFP+. $.02, YMMV On Tue, Dec 8, 2015 at 1:08 AM, Skylar Thompson <[email protected]<mailto:[email protected]>> wrote: The two drawbacks I'm aware of with Cat6a are that it's much heavier than Cat6, and much less flexible. Using twisted-pair has the advantage over fiber of being a bit cheaper (no separate transceivers needed) and a little denser (at least for our switch modules). Skylar On Mon, Dec 7, 2015 at 10:59 AM, John Stoffel <[email protected]<mailto:[email protected]>> wrote: >>>>> "Ski" == Ski Kacoroski <[email protected]<mailto:[email protected]>> >>>>> writes: Ski> We are rewiring our server room to support 10GB. The folks we Ski> talked to initially said that for the relatively short distances Ski> in the server room (less that 100ft) we can get by with cat 6 Ski> cabling for the patch cables from device to patch panel and Ski> probably even between patch panels because the distance is so Ski> short. The installer is saying that he will not certify that we Ski> will get 10GB unless we use cat 6A every where because of its Ski> shielding that stops alien crosstalk. I guess I wonder what the cost difference is between Cat6 and Cat6a is, and why you're not going with the better cable, just to make sure you don't have wonky problems down the line? I must admit that we've mostly just run fibre for 10g connections. John _______________________________________________ Discuss mailing list [email protected]<mailto:[email protected]> https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/ _______________________________________________ Discuss mailing list [email protected]<mailto:[email protected]> https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/ _______________________________________________ Discuss mailing list [email protected]<mailto:[email protected]> https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
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