On Wed, Jan 24, 2024 at 12:55 AM Owen DeLong <owen@delong.com> wrote:
BGP is more of a PDVP (Policy Distance Vector Protocol).
Hi Owen, That's a distinction without a difference. All but the most rudimentary implementation of a distance-vector protocol supports policy definition and enforcement. BGP has more policy knobs than most, but at its heart it's still a distance-vector protocol and until pushed off its default settings its first differentiator for distance is the length of the AS path. Only link-state protocols tend to lack policy knobs since all nodes must agree about the correct full path, not just the next closest hop. When you twist a policy knob to move BGP off its defaults, you take responsibility for making a better routing choice. And for correcting that choice if it should prove faulty. What I've seen here in this thread is a bunch of folks abdicating that responsibility. That's not unexpected, but it is disappointing. Regards, Bill Herrin -- William Herrin bill@herrin.us https://bill.herrin.us/