Security control in DSL access network

Mikael Abrahamsson swmike at
Tue Mar 28 12:59:42 UTC 2006

On Tue, 28 Mar 2006, Sean Donelan wrote:

> ROUTER---ip---BRAS---atm---DSLAM---dsl---B-NT---ethernet---COMPUTER
> In reality, these are protocol stacks such as IP over PPP over ATM over
> DSL, but it makes the ASCII artwork very confusing.

Let me counter with:

ROUTER - ip/ethernet - DSLAM - ip/ethernet/atm/dsl - CPE - ip/ethernet - COMPUTER

In some cases a modern dslam will do routing as well. ATM was close to 
death before DSL came along, please don't CPR it anymore. Let it R.I.P.

Mikael Abrahamsson    email: swmike at

More information about the NANOG mailing list