On 26/08/13 20:22, Tim Streater wrote:
In article ,
(Andrew Gabriel) wrote:

In article ,
Tim Streater writes:
In article ,
The Natural Philosopher wrote:
How else can BT know where to vector the actual ATM conversation?
I would have expected that, with one end in my local exchange,
the other end on the ISP's router, BT would use their management
software to set up a VC between those points over their ATM
network, and that would be it as far as their involvement was
concerned. However, giggling for "BT Radius Server" appears to
indicate that it doesn't work like that; perhaps the simple
approach doesn't scale.

It doesn't actually know who your ISP is until your router tries to
login.
If you reconfigure your router with the login details for another person
using a different ISP (but also on BT wholesale), you will find you can
login to their ISP on your line just like you normally log in to yours.

So the ATM circuit is built on the fly? That would make some sense.

I did almost understand it once - but I THINK the way it goes is that
you open a default ATM circuit to BT's radius server which knows broadly
'who' you belong to, and that then opens a new circuit to the ISP's
radius server using the credentials you have presented already..then you
get logged in there and have a direct virtual circuit to their
termination kit.


--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers.