-----Original Message----- From: Joe Maimon [mailto:jmaimon@ttec.com] Sent: Monday, May 04, 2009 10:04 AM To: Joe Greco Cc: nanog list Subject: Re: Where to buy Internet IP addresses
Joe Greco wrote:
One of the goals of providing larger address spaces was to reduce (and hopefully eliminate) the need to burn forwarding table entries where doing so isn't strictly necessary. When we forget this, it leads us to the same sorts of disasters that we currently have in v4.
... JG
And if you are encouraging /48 handouts, /32 isnt large enough to prevent that on the global level.
If you are handing out /48s then if have more than 64k clients (or will in the next few years) then You should ask (or should have asked) for more than a /32 (Need 128k clients? == /31) ... (Need 512k clients? == /29) ... ... ... (Need ~512,000k clients? == /19) And, again, each of those clients has 64k subnets. With each subnet supporting as many hosts as they want to put there. And, we can allocate 2^16 (64k) of THOSE (/19) sized allocations from the CURRENT (2000::)/3. IMHO - While that should last us a "long time", we can follow that up with 4000::/3 - and revisit policies then, as needed. And, we could do something like use /56s for home-users and the math above "shifts larger" ... Ask, and ye shall receive. /TJ