nanog mailing list archives
Re: Shim6, was: Re: filtering /48 is going to be necessary
From: William Herrin <bill () herrin us>
Date: Mon, 12 Mar 2012 18:50:13 -0400
On Mon, Mar 12, 2012 at 5:14 PM, Iljitsch van Beijnum <iljitsch () muada com> wrote:
On 12 Mar 2012, at 21:15 , William Herrin wrote:Not at all. You just build a second tier to the routing system.We already have two tiers: DNS names and IP addresses.
Hi Iljitsch, If only that were true. The DNS doesn't sit to the side of TCP, managing the moment to moment layer 4 to layer 3 mapping function the way ARP sits to the side of IP. Instead, the DNS's function is actuated all the way up at layer 7. This was the crux of my complaint about the getaddrinfo/connect APIs last week. Their design makes a future introduction of a transport protocol, something which actually does interact with the name service at the proper layer, needlessly hard. That and the common non-operation of the DNS TTL invalidates DNS' use as a routing tier. 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: Shim6, was: Re: filtering /48 is going to be necessary, (continued)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Joel jaeggli (Mar 18)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Seth Mos (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Owen DeLong (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Seth Mos (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Owen DeLong (Mar 12)
- Message not available
- Re: Shim6, was: Re: filtering /48 is going to be necessary Tim Chown (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Owen DeLong (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary William Herrin (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Iljitsch van Beijnum (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Łukasz Bromirski (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary William Herrin (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Geoff Huston (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary William Herrin (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Leo Bicknell (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary William Herrin (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Masataka Ohta (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary William Herrin (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Josh Hoppes (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Mark Andrews (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary William Herrin (Mar 12)
- Re: Shim6, was: Re: filtering /48 is going to be necessary Masataka Ohta (Mar 13)