--- Prem D'Souza premstud@vsnl.com wrote:
krishnan, isps use a technique called Classless interdomain routing to reserve the present ip address for the maximum clients.
I'm quite conversant with CIDR actually - its been around since the early 90's. If you see my explanation of subnets, you'll realize that what I have described uses VLSMs (Variable Length Subnet Masks), which are the basis of CIDR addressing. You would have needed to refer me to CIDR if I had proposed classful routing, which I haven't.
The issue here is not the use of CIDR ar all - we're talking tiny subnets of 2 clients, 4 clients, etc, which are smaller than the smallest classful netmask (class C, which does 254 usable net addresses). What I described was how ISPs actually *have* wastefully allocated addresses in the past - using VLSMs! If you read my post through, you'll find that I have deprecated this practice.
Incidentally, that still does not address the issue of deserializing a (hypothetical) PPPOE connection, since the DSL link is a copper pair which is translated at the premise edge - into what, I do not know.
If you'd like to discuss this further, please mail me offlist, since much of this stuff is not pertinent to the ILUG-BOM mailing list.
Rgds,
Krishnan
__________________________________________________ Do You Yahoo!? Send instant messages & get email alerts with Yahoo! Messenger. http://im.yahoo.com/