[e2e] Addressing format...network and mask

Alok Dube alok.dube at apara.com
Wed Dec 3 01:01:02 PST 2003

why do I have to stick to "bit boundaries"?

they are meant for routers to lookup faster...so as long as i send them the
"range" let the routing node make its lookup table as it sees fit for
aligning to its bit boundaries...

why is that a problem?

----- Original Message -----
From: "Michael B Greenwald" <mbgreen at dsl.cis.upenn.edu>
To: "Alok Dube" <alok.dube at apara.com>
Cc: <end2end-interest at postel.org>
Sent: Monday, December 01, 2003 10:13 PM
Subject: Re: [e2e] Addressing format...network and mask

>    Mon, 1 Dec 2003 13:51:47 +0530
>    "Alok Dube" <alok.dube at apara.com>
>    I need a way to propogate the 1st address and last address of a
>    Incase i have 129 hosts in a network, i simply should propogate the 1st
>    address and the last address (or the number of hosts) instead of the
> I'm not sure what you really need to do here, but if I understand
> somewhat correctly, then why not just allocate two subnets, one with
> 128 hosts and one with 1 host?  If you are trying for a dense
> allocation of addresses within the net, then, in the absolute worst
> case, there will be 25% waste.  Usually, it will be much more densely
> packed (no waste at all in your example of 129).

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