RE: Fw: Now [OT] SDSL was Re: WOOOOOOOOO HOOOOOOO!!!!

["Ian Lowe" <ian@xxxxxxxxxxxxxxxxxx>]

It needs support at the ISP end, but sure...

PPP is a lower level protocol than IP, and the dual link is about the
PPP Protocol - a specific version called "ML PPP" (multi link
peer to
peer protocol).

Think about PPP passing data packets back and forth, which then get
re-built into IP packets.. the two ADSL pipes act as a single MLPPP
channel and packets that go down either pipe can be built back together
at the far end.

When your PC talks to a remote server, the IP packet your machine
constructs is broken into PPP chunks, which are then thrown over either
of the ADSL uplinks... at the far end, the router gets these chunks,
puts them back together, to reconstruct your IP packet and sends it on..

When the response comes back, the reverse happens.. the ISP's router
breaks the IP packet into PPP chunks, and throws them down the quietest
ADSL link, where the kit at your end rebuilds them into your IP packet
which gets passed on to your app..

Simple ;)

I.

Ps> It's not *quite* that simple, but this is a good noddy description
:D


-----Original Message-----
From: Stuart Grimshaw [mailto:stuart@xxxxxxx]
Sent: 18 February 2004 20:28
To: UKHA List
Subject: Re: Fw: [ukha_d] Now [OT] SDSL was Re: WOOOOOOOOO HOOOOOOO!!!!

On Wed, 2004-02-18 at 16:04, Gareth Cook wrote:
> Yes 1Mb down, 512k up.
>
> Just like ISDN, select 2 adaptors to dial up with.

Does this work?

Surely if you're downloading a file from server X it's not going to
split the request over two lines (effectively 2 IP's) without some
special gateway to handle the splitting & re-jigging of the file?




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