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Re: [LUG] Fast link over a short distance

 

On Wed, 23 Jun 2010, stinga@xxxxxxxxxxxxx wrote:

We thought of the sewer option! 100m would do at a push but I would be a problem on occasions.

OK. So it's 12m or 40' on old money. Given suitable anchor points, you could string a catenary wire and suspend copper/fibre off it, but you'll likely need planning permission to cross a public road...

(I've a client in South Wales who did just this - and they closed the road for a day to string it!)

Commodity Wi-Fi - 802.11n - might yield 150Mb/sec half duplex... So...

You need a Linux box at each end - and we're not talking about a low-power one, alas - a full-on 3GHz box to start with. 4 Gb Ethernet ports. 3 pairs of Wi-Fi access points working in bridge mode (where you pair a unit to exactly one other unit) They'll be running off channels 1, 6 and 11. This assumes no other (or minimal interference) from other APs in the area.

Then with link aggregation in Linux you might just get 3 x the link speed, so you're up to 450Mb/sec.

Not a cheap solution though.

There's some interesting stuff coming up in the 60GHz range and I've 2 clients working on this independent of each other (and signed NDAs suggest they'll stay independent!) They're looking at 10Gb bridging and PtMP solutions - mostly aimed at indoor HD video broadcasting. 60GHz is very short range though (10's of metres, line of sight) However I suspect this is going to be some time away yet...

I'll ask the boffins I know in this area what's avalable now.

Gordon

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