nanog mailing list archives
RE: ISP customer assignments
From: "Brian Johnson" <bjohnson () drtel com>
Date: Mon, 5 Oct 2009 13:10:15 -0500
What would be "wrong" with using a /64 for a customer who only has a local network? Most home users won't understand what a subnet is. - Brian
-----Original Message----- From: wherrin () gmail com [mailto:wherrin () gmail com] On Behalf Of
William
Herrin Sent: Monday, October 05, 2009 11:58 AM To: Brian Johnson Cc: nanog () nanog org Subject: Re: ISP customer assignments On Mon, Oct 5, 2009 at 11:27 AM, Brian Johnson <bjohnson () drtel com> wrote:From what I can tell from an ISP perspective, the design of IPv6 isforassignment of a /64 to an end user. Is this correct? Is this how itiscurrently being done? If not, where am I going wrong?No. A /64 is one *subnet*. Essentially the standard, static size for any Ethernet LAN. For a customer, the following values are more appropriate: /128 - connecting exactly one computer. Probably only useful for your dynamic dialup customers. Any always-on or static-IP customer should probably have a CIDR block. /48 - current ARIN/IETF recommendation for a downstream customer connecting more than one computer unless that customer is large enough to need more than 65k LANs. /56 - in some folks opinion, slightly more sane than assigning a 65k subnets and bazillions of addresses to a home hobbyist with half a dozen PC's. /60 - the smallest amount you should allocate to a downstream customer with more than one computer. Anything smaller will cost you extra management overhead from not matching the nibble boundary for RDNS delegation, handling multiple routes when the customer grows, not matching the standard /64 subnet size and a myriad other obscure issues. 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: ISP customer assignments, (continued)
- Re: ISP customer assignments Dorn Hetzel (Oct 05)
- Re: ISP customer assignments bmanning (Oct 05)
- RE: ISP customer assignments TJ (Oct 05)
- Re: ISP customer assignments Owen DeLong (Oct 05)
- Re: ISP customer assignments Kevin Loch (Oct 06)
- Re: ISP customer assignments Joe Greco (Oct 05)
- Re: ISP customer assignments Joel Jaeggli (Oct 05)
- Re: ISP customer assignments Carsten Bormann (Oct 05)
- Re: ISP customer assignments Seth Mattinen (Oct 05)
- RE: ISP customer assignments Brian Johnson (Oct 05)
- Re: ISP customer assignments Chuck Anderson (Oct 05)
- Re: ISP customer assignments William Herrin (Oct 05)
- Re: ISP customer assignments Ricky Beam (Oct 05)
- Re: ISP customer assignments Dan White (Oct 05)
- Re: ISP customer assignments Valdis . Kletnieks (Oct 05)
- Re: ISP customer assignments Dan White (Oct 05)
- Re: ISP customer assignments Ricky Beam (Oct 05)
- Re: ISP customer assignments Dan White (Oct 06)