[AusNOG] Copper versus fibre in the DC

[Peter Tiggerdine]

SMF for carrier to rack but I don't see any problems with MMF inter rack.
The delta between SFP cost is well worth it.
On 12/10/2013 5:51 PM, "James Braunegg" <james.braunegg at micron21.com> wrote:

> Dear Alastair,****
>
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> I would recommend ****
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> Single mode Fibre for any rack to rack communications , or rack to carrier
> communication . ****
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> Today the same single mode fibre will run 1gbit, 10gbit, 40gbit and
> 100gbit … and I’m sure it will run 400gbit in years to come and that’s
> before you look at wavelength technology.****
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> I also find fibre has an placebo effect on people thinking it’s more
> important than copper so they take more care when touching it….****
>
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> I would only use copper for Switch to Server communication within a rack**
> **
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> Kindest Regards****
>
> ** **
>
> *James Braunegg
> **P:*  1300 769 972  |  *M:*  0488 997 207 |  *D:*  (03) 9751 7616****
>
> *E:*   james.braunegg at micron21.com  |  *ABN:*  12 109 977 666
> *W:*  www.ddosprotection.com.au  *T:* @micron21****
>
> ** **
>
>
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> *From:* AusNOG [mailto:ausnog-bounces at lists.ausnog.net] *On Behalf Of *Alastair
> Waddell
> *Sent:* Friday, October 11, 2013 9:13 PM
> *To:* ausnog at ausnog.net
> *Subject:* [AusNOG] Copper versus fibre in the DC****
>
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> Hi AusNOG,****
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>
> I expect there's strong opinions about this.****
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> As I'm relocating DCs, its an opportunity to re-assess carrier
> interconnect terminations. ****
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> I've been reading how copper (CAT7) is still valid with 10Gb/s ethernet
> and at the same time how the transceiver is a point of latency where the
> optics must be converted to electrical signal.****
>
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> I figure the transceiver is also a point of failure that's absent in
> copper although such an argument must surely factor the qualify of the
> cable/RJ and it's subsequent handling (but how hard can it be!)****
>
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> So: ****
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> * Is copper a valid or even a 'better' choice to terminate carriers in the
> DC for 1Gb/s and beyond to 10Gb/s? *****
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> PS KISS and risk mitigation rule in my little world. My fallback position
> is that fibre is still preferred as the 'safe' option especially wrt
> 10Gb/s. I just want to canvass all options. I don't want to repeat the
> exercise with the carriers at some future date if I can avoid it. It
> probably means, sub 1Gb/s top-of-rack kit today (looking at 4948/4900M or
> Juniper equivalents) and new kit at somewhere near 1Gb/s throughput with a
> preference to avoid carrier re-cabling. ****
>
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> "With the release of the IEEE 802.3an standard, 10 Gb/s over balanced
> twisted-pair cabling (10GBASE-T) is the fastest growing and is expected to
> be the most widely adopted 10GbE option. "****
>
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> "At 1 Gb/s speeds, balanced twisted-pair compatible electronics offer
> better latency performance than fibre; however, considering latency at 10
> Gb/s, currently fibre components perform better than balanced twisted-pair
> compatible 10GBASE-T electronics"****
>
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> "Since optical fibre electronics cannot autonegotiate, a move from
> 1000BASE-xx to 10GBASE-xx requires a hardware change. In contrast, both
> 1GbE and 10GbE can be supported by 10GBASE-T balanced twisted-pair
> compatible equipment."****
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> ** **
>
>
> http://www.siemon.com/uk/white_papers/08-07-10-copper-fiber-options-data-center.asp
> ****
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> Regards,****
>
> -- ****
>
> Alastair Waddell
> Legion Internet
> Australia****
>
> ** **
>
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