Data Center Wiring Standards
bsehmel at hopone.net
Sat Sep 9 04:54:32 UTC 2006
Rick Kunkel wrote:
> Heya folks,
> I hope this is on-topic. I read the charter, and it falls somewhere along
> the fuzzy border I think...
> Can anyone tell me the standard way to deal with patch panels, racks, and
> switches in a data center used for colocation? I've a sneaking suspicion
> that we're doing it in a fairly non-scalable way. (I am not responsible
> for the current method, and I think I'm glad to say that.) Strangely
> enough, I can find like NO resources on this. I've spent the better part
> of two hours looking.
> Right now, we have a rack filled with nothing but patch panels. We have
> some switches in another rack, and colocation customers scattered around
> other racks. When a new customer comes in, we run a long wire from their
> computer(s) and/or other device(s) to the patch panel. Then, from the
> appropriate block connectors on the back of the panel, we run another wire
> that terminates in a RJ-45 to plug into the switch.
> Sounds bonkers I think, doesn't it?
> My thoughts go like this: We put a patch panel in each rack. Each of
> these patch panels is permanently (more or less) wired to a patch panel in
> our main patch cabinet. So, essentially what you've got is a main patch
> cabinet with a patch panel that corresponds to a patch panel in each other
> cabinet. Making connection is cinchy and only requires 3-6 foot
> off-the-shelf cables.
> Does that sound more correct?
> I talked to someone else in the office here, and they believe that they've
> seen it done with a switch in each cabinet, although they couldn't
> remember is there was a patch panel as well. If you're running 802.1q
> trunks between a bunch of switches (no patch-panels needed), I can see
> that working too, I suppose.
> Any standards? Best practices? Suggestions? Resources, in the form of
> books, web pages, RFCs, or white papers?
> Rick Kunkel
Ideally from each core router would go to a two distribution-a switch
(Cat 4900 or something similar), from both dist-a switch then go to two
bigger distribution (dist-b) switches (cat 6500 etc) Then from each 6500
go to there own patch panels. Then from the two patch panels run a
cables to access level (2900's etc) switches in each rack / shelf. This
way you have full redundancy in each shelf for your co-located /
My .02 cents
Bill Sehmel - bsehmel at HopOne.net -- 1-703-288-3081
Systems Administrator, HopOne Internet Corp. DCA2 NOC
Bandwidth & full range of carrier/web host colo + networking
services: http://www.hopone.net ASN 14361
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