nanog mailing list archives
Re: 16-bit ASN kludge
From: John Dupuy <jdupuy-list () socket net>
Date: Fri, 03 Dec 2004 16:36:39 -0600
Along these lines, one could leave the transit AS networks alone if a parallel 16 bit ASN space were created. Essentially, any non-transit network would have it's non-public ASN retranslated NAT-style by upstream transit network border routers. Only the border routers would have to be changed. They would have to differentiate between public ASN X and non-public ASN X (same number) based on the which side of the router the ASN was learned from.
This would essentially double the ASN numbers available. All that being said, I'd much rather see 32-bit ASNs. John At 10:48 AM 12/3/2004, Edward B. Dreger wrote:
Perhaps transit networks should receive 16-bit ASNs. Leaf networks would use { a special ASN | I'm still brainstorming | who knows } and carry an "available upstreams" BGP tag for each upstream. Metrics are calculated for each transit AS. Those metrics are then combined with <as yet unspecified intelligence in "available upstreams" tag> for each leaf ASN. BGP loop detection might present a problem if all leaf ASNs use, say, 16-bit AS65535. If existing allowas-in is too coarse, refer to "32-bit ASN" BGP attribute for fine-grained control. In short: I'm trying to think up a mechanism that performs full Dijkstra calculations _only_ for transit networks, and uses some cheaper version for the degenerate case of a leaf network. Eddy -- Everquick Internet - http://www.everquick.net/ A division of Brotsman & Dreger, Inc. - http://www.brotsman.com/ Bandwidth, consulting, e-commerce, hosting, and network building Phone: +1 785 865 5885 Lawrence and [inter]national Phone: +1 316 794 8922 Wichita ________________________________________________________________________ DO NOT send mail to the following addresses: davidc () brics com -*- jfconmaapaq () intc net -*- sam () everquick net Sending mail to spambait addresses is a great way to get blocked.
Current thread:
- 16-bit ASN kludge Edward B. Dreger (Dec 03)
- Message not available
- Re: 16-bit ASN kludge John Dupuy (Dec 03)
- Re: 16-bit ASN kludge Owen DeLong (Dec 03)
- Re: 16-bit ASN kludge Edward B. Dreger (Dec 03)
- Re: 16-bit ASN kludge Owen DeLong (Dec 03)
- Re: 16-bit ASN kludge Edward B. Dreger (Dec 03)
- Re: 16-bit ASN kludge Owen DeLong (Dec 04)
- Re: 16-bit ASN kludge Iljitsch van Beijnum (Dec 04)
- Re: 16-bit ASN kludge Edward B. Dreger (Dec 04)
- Re: 16-bit ASN kludge Iljitsch van Beijnum (Dec 05)
- Re: 16-bit ASN kludge Owen DeLong (Dec 05)
- Re: 16-bit ASN kludge Edward B. Dreger (Dec 05)
- Re: 16-bit ASN kludge John Dupuy (Dec 03)
- Message not available