[AusNOG] [nznog] What is more important? - ipv4 vs. routing table size

[Brian E Carpenter]

I've got no standing as an operator to have an opinion on this.

However, I have recently published a peer reviewed paper that looks
at the history of BGP4 growth in a slightly new way.

My conclusion is that the CIDR policy and the insistence on
ISP-based aggregation of long prefixes was essential in keeping
the growth of the BGP4 table under control over the last 14 years
or so, and relaxing the pressure for aggregation would still be
pretty  dangerous. See the first paper listed at
http://www.cs.auckland.ac.nz/~brian/pubs.html

That doesn't, strictly speaking, affect the question of what's
the longest prefix that you accept, but the questions are linked.

Regards
   Brian Carpenter
   University of Auckland

On 2009-08-07 03:28, Skeeve Stevens wrote:
> Hey all,
> 
> I'd like to stimulate some discussion regarding IPv4 conservation vs. The size of the routing table.
> 
> I'd like to hear what people think is more important - and why - which it is more important - or a miz?
> 
> 
> IPv4 conservation - possibly allocating smaller default allocations - or making it easier (/24, /23)
> 
> vs.
> 
> The size or the routing table.  If by a more conservative allocation above was done, and the world table jumped to 400, 500 thousands or more routes - what implications would this have on routers and so on.
> 
> APNIC's minimum is a /22 (was a /19 in 2000) (4 * /24's)
> ARIN is a /20 to ISPs (16 * /24's)
> RIPE is a /21 (8 * /24's)
> LANIC is a /21 (I think)
> AFRINIC is a /22 (4 * /24's)
> 
> There are smaller hosting companies out there (here in ANZ at least) that want to be on, hosting, multi-homed, but only need a /24 or /23, but they're given the minimum allocation on a /22 - whether they need it or not.
> 
> Thoughts?
> 
> 
> --
> Skeeve Stevens, CEO/Technical Director
> eintellego Pty Ltd - The Networking Specialists
> skeeve at eintellego.net / www.eintellego.net
> Phone: 1300 753 383, Fax: (+612) 8572 9954
> Cell +61 (0)414 753 383 / skype://skeeve
> www.linkedin.com/in/skeeve ; facebook.com/eintellego
> --
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> 
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