nanog mailing list archives
Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum
From: Nathan Ward <nanog () daork net>
Date: Wed, 20 Aug 2008 05:36:33 +1200
On 20/08/2008, at 5:25 AM, Michael Thomas wrote:
Justin M. Streiner wrote:On Tue, 19 Aug 2008, michael.dillon () bt com wrote:I don't operate an ISP network (not anymore, anyway...). My customers are departments within my organization, so a /64 per department/VLAN is more sane/reasonable for my environment.I don't have a problem with assigning customers a /64 of v6 space.Why so little? Normally customers get a /48 except for residential customers who can be given a /56 if you want to keep track of different block sizes. If ARIN will give you a /48 for every customer, then why be miserly with addresses?Uh, the lower 64 bits of an IP6 address aren't used for routing you know? They're essentially the mac address, or some other sort of autoconf'd host identifier. Last I heard, the smallest allocation is supposed to be a /48 -- I hadn't heard of the /56 thing that Michael was speaking of, though I'm not surprised. There's 64 bits for routing... no need to be so stingy :)
64 bits is not a magical boundary. 112 bits is widely recommended for linknets, for example. 64 bits is common, because of EUI-64 and friends. That's it.There is nothing, anywhere, that says that the first 64 bits is for routing.
-- Nathan Ward
Current thread:
- RE: It's Ars Tech's turn to bang the IPv4 exhaustion drum, (continued)
- RE: It's Ars Tech's turn to bang the IPv4 exhaustion drum TJ (Aug 18)
- RE: It's Ars Tech's turn to bang the IPv4 exhaustion drum Antonio Querubin (Aug 18)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Iljitsch van Beijnum (Aug 18)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Justin M. Streiner (Aug 18)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Iljitsch van Beijnum (Aug 18)
- RE: It's Ars Tech's turn to bang the IPv4 exhaustion drum TJ (Aug 18)
- RE: It's Ars Tech's turn to bang the IPv4 exhaustion drum michael.dillon (Aug 19)
- RE: It's Ars Tech's turn to bang the IPv4 exhaustion drum Justin M. Streiner (Aug 19)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Michael Thomas (Aug 19)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Randy Bush (Aug 19)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Nathan Ward (Aug 19)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Alain Durand (Aug 19)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Randy Bush (Aug 19)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Kevin Loch (Aug 19)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Iljitsch van Beijnum (Aug 20)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Sam Stickland (Aug 21)
- RE: It's Ars Tech's turn to bang the IPv4 exhaustion drum Miya Kohno (Aug 21)
- RE: It's Ars Tech's turn to bang the IPv4 exhaustion drum TJ (Aug 19)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Seth Mattinen (Aug 19)
- Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum Tony Finch (Aug 19)
- RE: It's Ars Tech's turn to bang the IPv4 exhaustion drum michael.dillon (Aug 20)