>-----Original Message----- >From: Ricky Beam [mailto:jfb...@gmail.com] >Sent: Monday, May 04, 2009 6:38 PM >To: nanog list >Subject: Re: Where to buy Internet IP addresses > >On Mon, 04 May 2009 18:01:32 -0400, Jack Bates <jba...@brightok.net> wrote: >> Given there is no CLASS, but just a separation of network and host, >> I'd hate to compare it to classful routing. They probably would have >> been happy with a /96 network except for stateless autoconfig, which >> is quite nice for some stuff actually. > >Ok, calling it "classful routing" might be a little melodramatic. > >I would love to be able to set interfaces on my cisco hardware to /96's, but >it's not allowed. Autoconfig screws that up. Even if it's not used, you're >forced to live with it. Linux, BSD, etc. don't care. (and the instant they do, >I can remove that stupid code.)
Actually, they will - you can set them to any arbitrary value between 1 and 128 (inclusive), atleast on every piece of gear I've tried to use. > >> I've not tried every vendor out there, but I've noticed some >> implementations handle /127 just fine from a routing perspective. > >So far, Cisco's gear is the only IPv6 routers I've messed with. And they >will not let you set an interface to anything smaller than a /64. >Loopbacks have slightly different rules, but in my case (IPv6 tunnels) that >fact hasn't proven very useful. See above. Maybe true on some gear, or some old IOS, or when using the auto-config key word ... ? /TJ