Re: BGP Private ASes

On Thu, 12 Sep 2002, Ewen McNeill wrote:

In message , Andy Li nton writes:

...

I meant to post to all concerned. Do you want to forward my mail and your response to get this rolling again?

Done. Joe Abley seems to be suggesting that public ASes can be obtained (at least by providers for their customers) for the purposes that Aaron is talking about, perhaps along with provider independent space with a long prefix. But something tells me that won't scale to everyone on Citylink getting provider independent space and their own AS...

I agree with Joe that it is possible to get a public AS and some address space for mulithoming but we'd be talking about a 50% increase in NZ's AS number assignment. (APNIC have currently allocated 89 AS numbers to NZ + some earlier allocations from the US registries and we'd need 42+ private AS replacements for Citylink alone). The policy for AS numbers is effectively described at http://www.apnic.net/docs/drafts/apnic-draft-asn-v002.txt The problem I see with say Citylink customers applying under this schema is that assigning them an AS number does nothing to reduce the size of global address tables and the number will not be used to describe diverse routes in the global routing fabric. So private AS numbers seem like the 'right thing'. Where people really do want to multihome for global connectivity there is a mechanism - see the above and for multihoming IPv4 address space see http://www.apnic.net/info/faq/multihoming_faq.html But people should note - there is a cost in dollars and renumbering effort. - To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog