nanog mailing list archives
Re: What's really needed is a routing slot market (was: Using IPv6 withprefixes shorter than a /64 on a LAN)
From: William Herrin <bill () herrin us>
Date: Mon, 7 Feb 2011 11:30:05 -0500
On Mon, Feb 7, 2011 at 9:25 AM, Jamie Bowden <jamie () photon com> wrote:
It would help if we weren't shipping the routing equivalent of the pre DNS /etc/hosts all over the network (it's automated, but it's still the equivalent). There has to be a better way to handle routing information than what's currently being done.
Hi Jamie, Consensus in the routing research arena is that it's a layer boundary problem. Layer 4/5 (TCP, various UDP-based protocols) intrudes to deeply into layer 3. Sessions are statically bound at creation to the layer 3 address. Unlike the dynamic MAC to IP bindings (with ARP) the TCP to IP bindings can't change during the potentially long-lived session. Thus route proliferation is needed to maintain them. Much better routing protocols are possible, but you first either have to break layer 3 in half (with a dynamic binding between the two halves that renders the lower half inaccessible to layer 4) or you have to redesign TCP with dynamic bindings to the layer 3 address. Ideas like LISP take the former approach. Ideas like SCTP and Multipath TCP take the latter. The deployment prospects are not promising. Modest improvements like FIB compression are in the pipeline for DFZ routing, but don't expect any earth shattering improvements. Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- Re: What's really needed is a routing slot market, (continued)
- Re: What's really needed is a routing slot market Joel Jaeggli (Feb 06)
- Re: What's really needed is a routing slot market John Curran (Feb 06)
- Re: What's really needed is a routing slot market Joel Jaeggli (Feb 06)
- Re: What's really needed is a routing slot market Jimmy Hess (Feb 06)
- Re: What's really needed is a routing slot market William Herrin (Feb 06)
- Re: What's really needed is a routing slot market John Levine (Feb 06)
- Re: What's really needed is a routing slot market Dorn Hetzel (Feb 06)
- Re: What's really needed is a routing slot market Jack Bates (Feb 06)
- Re: What's really needed is a routing slot market Eliot Lear (Feb 08)
- RE: What's really needed is a routing slot market (was: Using IPv6 withprefixes shorter than a /64 on a LAN) Jamie Bowden (Feb 07)
- Re: What's really needed is a routing slot market (was: Using IPv6 withprefixes shorter than a /64 on a LAN) William Herrin (Feb 07)
- Re: What's really needed is a routing slot market Jack Bates (Feb 07)
- Re: What's really needed is a routing slot market (was: Using IPv6 withprefixes shorter than a /64 on a LAN) Owen DeLong (Feb 07)
- Re: What's really needed is a routing slot market (was: Using IPv6 withprefixes shorter than a /64 on a LAN) Matthew Petach (Feb 07)
- Re: What's really needed is a routing slot market (was: Using IPv6 withprefixes shorter than a /64 on a LAN) Owen DeLong (Feb 07)
- Re: What's really needed is a routing slot market (was: Using IPv6 withprefixes shorter than a /64 on a LAN) cja () daydream com (Feb 07)
- RE: What's really needed is a routing slot market (was: Using IPv6 withprefixes shorter than a /64 on a LAN) Koch, Andrew (Feb 07)
- Re: What's really needed is a routing slot market (was: Using IPv6 withprefixes shorter than a /64 on a LAN) Matthew Petach (Feb 08)
- Re: What's really needed is a routing slot market Neil Harris (Feb 08)
- Re: What's really needed is a routing slot market Paul Timmins (Feb 08)
- Re: Telco style routing, was What's really needed is a routing slot market John Levine (Feb 08)