+++ Raju Mathur [linux-india] <12/03/02 12:03 +0530>:
> ARIN, APNIC, RIPE & co are moving in that direction -- trying to get
> the organisations who have huge IP blocks to exchange them for smaller
> ones which fit their current and planned infrastructure.
That's right.
> routing. Core router BGP tables are already overflowing with IP's
> being broken into increasingly smaller blocks. The smaller the blocks
That's where ASNs come in. Once an ISP gets itself an AS, that's all the
core routers at other ISPs need to know.
Within that AS, within that IP space, the ISP can suballocate IP space to
anybody they care to ... and maintain local routes for them. Ditto with
announcing other ASNs (a smaller ISP can have its AS announce only by one
larger ISP).
This sort of thing keeps the routing tables smaller. The core routers won't
need to keep track of every single /27 assigned to DSL customers.
> Routing table size has become such an issue that most of the
> registries now refuse to allocate anything less than a /19 (8192 IP's)
> and are planning to raise that threshold to the best of my knowledge.
I don't recall people approaching ARIN / APNIC for lower than that, these
days :) They want smaller blocks, they normally go straight to an ISP.
It is still pretty easy to get IP blocks that size ... sprint, uunet and such
hand them out like popcorn if you ask them (costly popcorn of course) :)
--srs
--
Suresh Ramasubramanian <----> mallet <at> efn dot org
EMail Sturmbannfuhrer, Lower Middle Class Unix Sysadmin
[Linux One Stanza Tip] From : <[EMAIL PROTECTED]>
LOST #168 -**< Sub : Lesser used commands (expand) >**-
expand is a filter that converts tabs to spaces. If tabs are
to be removed from a file, it is as simple as:
'$expand filename > newfilename'
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