nanog mailing list archives
Re: classful routes redux
From: Fred Baker <fred () cisco com>
Date: Wed, 2 Nov 2005 16:17:28 -0800
On Nov 2, 2005, at 4:01 PM, Bill Woodcock wrote:
On Wed, 2 Nov 2005, Fred Baker wrote:actually, no, I could compare a /48 to a class A....which makes the /32s-and-shorter that everybody's actually getting double-plus-As, or what?
A class A gives you 16 bits to enumerate 8 bit subnets. If you start from the premise that all subnets are 8 bits (dubious, but I have heard it asserted) in IPv4, and that all subnets in IPv6 are 16 bits (again dubious, given the recent suggestion of a /56 allocation to an edge network), a /48 is the counterpart of a class A. We just have a lot more of them.
All of which seems a little twisted to me. While I think /32, /48, / 56, and /64 are reasonable prefix lengths for what they are proposed for, I have this feeling of early fossilization when it doesn't necessarily make sense.
Current thread:
- RE: Using BGP to force inbound and outbound routing through particular routes, (continued)
- RE: Using BGP to force inbound and outbound routing through particular routes Hannigan, Martin (Nov 02)
- RE: Using BGP to force inbound and outbound routing through particular routes Edward W. Ray (Nov 02)
- RE: Using BGP to force inbound and outbound routing through particular routes John Dupuy (Nov 02)
- Re: Using BGP to force inbound and outbound routing through particular routes Richard A Steenbergen (Nov 02)
- Re: Using BGP to force inbound and outbound routing through particular routes Joe McGuckin (Nov 02)
- Re: Using BGP to force inbound and outbound routing through particular routes Randy Bush (Nov 02)
- Re: Using BGP to force inbound and outbound routing through particular routes Richard A Steenbergen (Nov 02)
- classful routes redux bmanning (Nov 02)
- Re: classful routes redux Fred Baker (Nov 02)
- Re: classful routes redux Bill Woodcock (Nov 02)
- Re: classful routes redux Fred Baker (Nov 02)
- Re: classful routes redux Bill Woodcock (Nov 02)
- Re: classful routes redux Kevin Loch (Nov 02)
- Re: classful routes redux Richard A Steenbergen (Nov 05)
- Re: classful routes redux Geoff Huston (Nov 05)
- RE: Using BGP to force inbound and outbound routing through particular routes Edward W. Ray (Nov 02)
- Re: classful routes redux Niels Bakker (Nov 02)
- Re: classful routes redux Stephen J. Wilcox (Nov 02)
- Re: classful routes redux Todd Vierling (Nov 03)
- Re: classful routes redux Richard A Steenbergen (Nov 03)
- Re: classful routes redux Stephen J. Wilcox (Nov 03)
- Re: classful routes redux bmanning (Nov 03)
- RE: Using BGP to force inbound and outbound routing through particular routes Hannigan, Martin (Nov 02)