Dear IPv6-USers,
(this is my first post here)
Just wondering if the assembled wisdom on this list has any views about
subnet numbering.
I'm just at the very earliest stages of designing the IPv6 layout, and
am trying to remember what I learnt on the 'test-run' of JANET/Tim
Chown's IPv6 Fundamentals course some many months ago.
We've got 2001:603:102::/48 assigned to us, and to start with I'm planning
on carving it up in /64's more or less exactly inline with our existing
IPv4 subnets.
The numbering of the existing IPv4 subnets is well known and understood
by the IT team here, so it makes sense to me to re-use it where
possible. The question in my mind however is:-
For a subnet 217 (for example), do I use:-
2001:630:102:217::/64
or
2001:630:102:d9::/64
Whilst the former is more 'readable' it's not really 'correct'.
Thoughts?
Mac
Assistant Systems Adminstrator @nibsc.ac.uk
[log in to unmask] +44 1707 641565
P.S. We also commonly use the subnet number as the VLAN number. The
range for this (in Ethernet at least) is 12bits wide. This will fit in
both decimal and hex into the 'subnet' word of the IPv6 address. So I
don't think it has much bearing on the choice.
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