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A hypothetical question

Cloudmaster
Grafter
Posts: 257
Registered: 01-08-2007

A hypothetical question

Hi all,

Following on from my question about SDSL, assuming that one day my exchange would be equipped to supply 8Mb broadband, & assuming my line length / quality would support the full 8Mb, would it be technically possible to have another line installed & enabled 'the wrong way' with 8Mb broadband (ie. 8Mb uplink), then have the two lines bonded so I've effectively got 8Mb SDSL?

I know some other providers do channel bonding & I'm sure I'd need some specialist hardware to make this happen, but is it even remotely viable?

Thanks
5 REPLIES
N/A

A hypothetical question

It is not possible to reverse ADSL as you essentialy describe it. They are limitations of the ITU specifications for ADSL.

Bonding is very well possible. Load balancing is available right now for reasonably cheap costs.

Bonding, or possibly the more accurate term is trunking, is the ability to take two lines, and make traffic flow over both connections as if they are one. This allows single connections to reach speeds near to wire speed of the two or more lines combined.

There is a loss in speed when bonding lines, as there is a control connection as well. This is reserved capacity for control information. So expect 5% loss of total capacity to this.

Load balancing is the cheaper option, where you take two or more lines and simply share the load of your connections equaly between lines. A single connection can only get upto the speed of your fastest line, but is some devices, upload can be bonded.

Balancing can be very good for Quality Of Service. You can reserve a second line to only certain departments or specific services (EG, mail only, or not web traffic), as well as just sharing the load.
Cloudmaster
Grafter
Posts: 257
Registered: 01-08-2007

A hypothetical question

Thanks for that answer Phil, ok so my 'vision' isn't technically possible, but two 8Mb lines bonded for a (close to) 16Mb downlink is an interesting idea :lol:
N/A

A hypothetical question

Indeed.

Take a look at the Nildram website for information on the sorts of costs you would expect from such bonding.

Balancing doesn't need anything more than two lines and a balancing router. Bonding requires setup on both sides (ISP and client side).
Cloudmaster
Grafter
Posts: 257
Registered: 01-08-2007

A hypothetical question

Just looked at the Nildram site, the setup / running costs don't look too expensive if you don't opt for the managed option, but those Cisco routers they recommend aren't cheap & having already had some experience of trying to set one up I think I'd go for Nildram's managed option (starting to get expensive Sad )
N/A

A hypothetical question

I believe there is the option of using a Linux machine to perform the bonding. How easy and cost effective this is, I do not know.