nanog mailing list archives
Re: Smaller than a /24 for BGP?
From: Donald Eastlake <d3e3e3 () gmail com>
Date: Sat, 28 Jan 2023 13:14:43 -0500
Use Multipath TCP https://datatracker.ietf.org/group/mptcp/documents/ Thanks, Donald =============================== Donald E. Eastlake 3rd 2386 Panoramic Circle, Apopka, FL 32703 USA d3e3e3 () gmail com On Sat, Jan 28, 2023 at 10:07 AM William Herrin <bill () herrin us> wrote:
On Fri, Jan 27, 2023 at 9:49 PM Masataka Ohta <mohta () necom830 hpcl titech ac jp> wrote:That multihomed sites are relying on the entire Internet for computation of the best ways to reach them is not healthy way of multihoming.This was studied in the IRTF RRG about a decade ago. There aren't any other workable ways of multihoming compatible with the TCP protocol, not even in theory. Every other mechanism imagined failed some basic system constraint, usually the requirement that packets have administrative permission to cross an intermediate network. So, another way of multihoming critically depends on replacing the layer-4 protocols with something that doesn't intermingle the IP address with the connection identifier. For clarity: TCP's connection identifier consists of the source and destination IP addresses plus the source and destination ports. Those four elements, unique when combined, identify exactly one ongoing TCP connection. Because of this, the connection must fail if the source or destination IP addresses are no longer available to the source or destination hosts. From this fact, we get the requirement that the entire Internet learn when a particular IP address has changed its position within the network. Regards, Bill Herrin -- For hire. https://bill.herrin.us/resume/
Current thread:
- Re: Smaller than a /24 for BGP?, (continued)
- Re: Smaller than a /24 for BGP? William Herrin (Jan 24)
- Re: Smaller than a /24 for BGP? Jon Lewis (Jan 24)
- Re: Smaller than a /24 for BGP? Masataka Ohta (Jan 24)
- RE: Smaller than a /24 for BGP? Robert McKay (Jan 24)
- Re: Smaller than a /24 for BGP? John Levine (Jan 24)
- Re: Smaller than a /24 for BGP? Forrest Christian (List Account) (Jan 24)
- Re: Smaller than a /24 for BGP? Lars Prehn (Jan 25)
- Re: Smaller than a /24 for BGP? Masataka Ohta (Jan 27)
- Re: Smaller than a /24 for BGP? William Herrin (Jan 28)
- Re: Smaller than a /24 for BGP? Donald Eastlake (Jan 28)
- Re: Smaller than a /24 for BGP? William Herrin (Jan 28)
- Re: Smaller than a /24 for BGP? William Herrin (Jan 28)
- Re: Smaller than a /24 for BGP? Masataka Ohta (Jan 28)
- Re: Smaller than a /24 for BGP? William Herrin (Jan 28)
- Re: Smaller than a /24 for BGP? Masataka Ohta (Jan 28)
- Re: Smaller than a /24 for BGP? William Herrin (Jan 29)