nanog mailing list archives
Re: Waste will kill ipv6 too
From: Owen DeLong <owen () delong com>
Date: Fri, 29 Dec 2017 07:56:26 -0800
On Dec 29, 2017, at 02:27, sthaug () nethelp no wrote:
My wild guess is if we'd just waited a little bit longer to formalize IPng we'd've more seriously considered variable length addressing with a byte indicating how many octets in the address even if only 2 lengths were immediately implemented (4 and 16.)Actually, that got heaved over the side fairly early in the IPng discussion, because nobody who was building silicon last century wanted to deal with arbitrary-length addresses. The IPv4 header had source and destination addresses on 4-byte boundaries for good reasons which still held true when we did the IPv6 headers.It's rather interesting how parsing of variable length addresses was thought to be way too complicated - while parsing of IPv6 extension header chains of unknown length was okay.
Well... first, fast routers mostly don’t parse those chains. Second, to the extent they do, it’s the biggest legitimate complaint I’ve seen with the design of IPv6. Owen
Steinar Haug, Nethelp consulting, sthaug () nethelp no
Current thread:
- Re: Waste will kill ipv6 too, (continued)
- Re: Waste will kill ipv6 too Mark Andrews (Dec 28)
- Re: Waste will kill ipv6 too Owen DeLong (Dec 28)
- Re: Waste will kill ipv6 too bzs (Dec 28)
- Re: Waste will kill ipv6 too Owen DeLong (Dec 28)
- Re: Waste will kill ipv6 too bzs (Dec 28)
- Re: Waste will kill ipv6 too Large Hadron Collider (Dec 28)
- Re: Waste will kill ipv6 too valdis . kletnieks (Dec 28)
- Re: Waste will kill ipv6 too sthaug (Dec 29)
- Re: Waste will kill ipv6 too Mikael Abrahamsson (Dec 29)
- Re: Waste will kill ipv6 too Nick Hilliard (Dec 29)
- Re: Waste will kill ipv6 too Owen DeLong (Dec 29)
- Re: Waste will kill ipv6 too Nick Hilliard (Dec 29)
- Re: Waste will kill ipv6 too William Herrin (Dec 29)
- Re: Companies using public IP space owned by others for internal routing james machado (Dec 17)
- Re: Companies using public IP space owned by others for internal routing Harry McGregor (Dec 17)
- Re: Companies using public IP space owned by others for internal routing Tom Carter (Dec 18)
- Re: Companies using public IP space owned by others for internal routing Harald Koch (Dec 18)
- Re: Companies using public IP space owned by others for internal routing Mark Andrews (Dec 18)
- Re: Companies using public IP space owned by others for internal routing Phil Bedard (Dec 18)