high speed DSL connectivity

[James Knott]

Teodor Iliescu wrote:
> On Mon, 15 Sep 2003, James Knott wrote:
> 
> 
>>You're a bit confused.  While IP address from RAS or other dial up 
>>access appear dynamic, they don't use dhcp.  Normally, a phone line is 
>>assigned it's own IP and whatever computer connects to that line, gets 
>>that IP.  If there are multiple lines, there will be mulitple IP 
>>addresses, and whichever address you get, depends on what line you 
>>connect to.  From the user point of view, the addresses are dynamic (not 
>>dhcp), but from the ISP point of view, they're static.  On the other 
>>hand, dhcp is used on ethernet, token ring or other multiple access 
>>networks, to assign IP addresses, on an as needed basis.  A dial up line 
>>has no need of a dhcp server and using one wouldn't help an ISP.
> 
> 
> How would a client get a static IP, if when he connects, he gets a
> different line? This is, assuming the client paid for the static IP, and 
> the ISP set him up.
> 
> Whouldn't there be an entry at the DHCP server, specifying a reservation 
> for that client?
> 
> If you say the IPs are statically set on the phone lines, then how would
> the ISP hand out dynamic information to the RAS clients, if say one of
> their DNS servers goes down? Options such as default gateway, primary and
> secondary DNS are scope options set at the DHCP server.

PPP supports assigning the address from either end.  If you have a 
static address, you put it into your configuration.  This will (if 
permitted) override the address that would otherwise be assigned.  If 
you don't have a static address, you get whatever address is associated 
with the phone line you connect to.

> 
> An article, that relates to this:
> http://www.winnetmag.com/Articles/Index.cfm?ArticleID=5413
> 
> Does anybody else have some input on this?
> 
> --
> Teodor I.
> http://penguincomputing.iwarp.com
> GPG key fingerprint : 9AC8 A05C 78AD AD73 91DB  CBE4 B644 F402 FBFD 5927
> 
> --
> The Toronto Linux Users Group.      Meetings: http://tlug.ss.org
> TLUG requests: Linux topics, No HTML, wrap text below 80 columns
> How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml


--
The Toronto Linux Users Group.      Meetings: http://tlug.ss.org
TLUG requests: Linux topics, No HTML, wrap text below 80 columns
How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml