On Wed, 26 Oct 2011, Jan Zorz @ go6.si wrote:
I also feel that 6RD justifies a /32, it doesn't justify a /30 or alike.
No. 6RD in it's natural form "needs" /24 in order to give /56 to users.
Yes, "needs" indeed. It's not a MUST though, it's just operationally easier. With 6RD you can take a IPv6 /36, map 8 bits of IPv4 into a IPv4 /24, map 24 bits into IPv6, and now you have that /60 you wanted for your customers. Yes, you "wasted" an IPv4 /24, but if you're that big so you need avoid doing 6RD on IPv4 /16 level (map 16 bits of IPv4 into a single IPv4 6RD relay address), give that relay a /40, then you can give your customers a /56, "wasting" a single IPv4 address per /16 with some additional configuration. Just to give some perspective if someone still thinks one can't deploy 6RD without mapping all of IPv4 space into IPv6. It's not true, it's just more complex. -- Mikael Abrahamsson email: swmike@swm.pp.se