BGP prefix filter list

[mel at beckman.org (Mel Beckman)]

Bill,

Come on now. The definition of an autonomous system is well established in RFC1930, which is still Best Current Practice:

https://tools.ietf.org/html/rfc1930#section-3

An AS is a connected group of one or more IP prefixes run by one
      or more network operators which has a SINGLE and CLEARLY DEFINED
      routing policy.

This is not an â??approximate explanationâ??. Itâ??s a standard, as strong as any standard that exists for the Internet.

How is your statement "Prefixes from the same AS are not required to have direct connectivity to each other and many do notâ?? supported by the published standard? :-)

 -mel

On May 30, 2019, at 10:42 AM, William Herrin <bill at herrin.us<mailto:bill at herrin.us>> wrote:

> On Thu, May 30, 2019 at 10:11 AM Mel Beckman <mel at beckman.org<mailto:mel at beckman.org>> wrote:
> > Are your sure about your Error #2, where you say "Prefixes from the same AS are not required to have direct connectivity to each other and many do not."?
> >
> > From BGP definitions:
> >
> > The AS represents a connected group of one or more blocks of IP addresses, called IP prefixes, that have been assigned to that organization and provides a single routing policy to systems outside the AS.