> It appears to me we can resolve the situation in either of two ways:
>
> 1. Get two more /64s, tunneled behind two mode static IPv4 addresses,
> and route the two new /64 blocks into our DMZ and test networks
> respectively.
>
> 2. Upgrade our /64 to a /48, then allocate three /64 subnets from that
> our three internal networks.
definately (2).
> Questions:
>
> 1. Could we do /68 subnets if we manually assigned addresses rather
> than using EUI-64 automatically generated ones? Or are /64 and /48
> the only allowable subnet sizes in IPv6?
subnet prefix length is /64 only.
allocation size from ISP to customer should be /48, but some ISPs
do different things.
itojun
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