[168641] in North American Network Operators' Group
Re: Is there such a thing as a 10GBase-T SFP+ transciever
daemon@ATHENA.MIT.EDU (Jima)
Sat Feb 1 23:40:10 2014
Date: Sat, 01 Feb 2014 21:40:29 -0700
From: Jima <nanog@jima.us>
To: nanog@nanog.org
In-Reply-To: <52EB09B1.3040606@team.dcsi.net.au>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
+1. Cisco calls them Twinax, HP calls them DACs. I don't know what
anyone else calls them as it hasn't come up in conversation for me.
Cisco appears to offer them in 1, 1.5, 2, 2.5, 3, and 5 meter passive,
as well as 7 and 10 meter active. HP has them in 1, 3, 7, 10, and 15
meter; no idea what the passive/active breakdown might be (they don't
appear to offer that information as freely). I've mostly used the
3-meter HP DACs so far, and I've been rather happy with them,
particularly the cost savings under 2x 10gbit SFP+ fiber transceivers.
Jima
On 2014-01-30 19:25, Chris Balmain wrote:
> You may wish to consider twinax for short distance 10G over copper with
> SFP+ at both ends
>
> http://en.wikipedia.org/wiki/Twinaxial_cabling#SFP.2B_Direct-Attach_Copper_.2810GSFP.2BCu.29
>
>
> Typically marketed as "direct-attach" (you can't remove the cables from
> the transceivers, it's all integrated)
>
> On 31/01/14 12:26, james jones wrote:
>> I would like to know if anyone has seen one of these? If so where?
>> Also if
>> they don't exist why? It would seem to me that it would make it a lot
>> easier to play mix and match with fiber in the DC if they did. Would
>> be so
>> hard to make the 1G SFPs faster (trying to be funny here not arrogant).
>>
>>
>> -James
>
