[AusNOG] 10GBase-T SFP modules?

[Beeson, Ayden]

Agreed, with Wave 1 it's basically a "nice to have" at the most, in a lot of cases, fairly redundant.

Wave 2 will change that though, with theoretical speeds going much higher with 160 MHz channels and beamforming to allow 3+ Gbps.

The AP will absolutely need to deliver more than 1gbps to reach anywhere near its speed allowances, even if that bandwidth is spread across multiple users.

Thanks,
Ayden Beeson


-----Original Message-----
From: James Andrewartha [mailto:trs80 at ucc.gu.uwa.edu.au]
Sent: Thursday, 10 July 2014 12:22 PM
To: Beeson, Ayden
Cc: Skeeve Stevens; Lincoln Dale; <ausnog at lists.ausnog.net>
Subject: Re: [AusNOG] 10GBase-T SFP modules?

On Thu, 10 Jul 2014, Beeson, Ayden wrote:

> I think very soon we will see an explosion of 10G base-T as well,
> given 802.11AC is ramping up, Wave 2 will definitely require it.

Not really. To get >1Gbps throughput with 802.11ac, you need wide channels and lots of MIMO or MU-MIMO. Eg 4SS at 80MHz will give you a physical rate of 1.7Gbps, if you're sitting in the same room as the AP. But you won't get 100% of that rate in real life, no enterprise is going to use 80MHz channels anyway, and even one wall in between the client and the AP will drop the rate significantly. Plus what sort of client application uses a solid 1Gbps apart from file transfers?

So maybe some guy with a top of the line laptop downloading Linux ISOs will need 10GBASE-T to the AP, but everyone else will be fine with 1Gbps.
Particularly MU-MIMO, since that'll be people's phones with 1SS which won't be doing 250Mbps each.

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