[GLLUG] Setting up an IPv6 test.

Robert McKay robert at mckay.com
Mon Oct 2 15:47:39 UTC 2017

Hi Chris,

afaik you could always use all the remaining network bits in the /48.. 
so yes, n can be anything.

I would also agree with other posters that it's better to get native 
IPv6 though. The 2002 prefix is sortof ghetto v6.. tcp socket clients 
will still prefer IPv4 vs. 2002 IPv6 if it's available.. so it will only 
get used with v6 only hosts, of which there aren't many.


On 2017-10-02 11:19, Chris Bell via GLLUG wrote:
> Hello,
> Plusnet have told me that they will not roll out IPv6 addresses until 
> they
> have totally run out of IPv4 addresses, so I am trying to set up an 
> IPv6 test
> configuration with a firewall providing radvd and routing fdxx
> site-local plus a
> global prefix. I have been unable to contact/join the he.net 
> tunnelbroker
> scheme and am now trying to set up a "6to4" tunnel. Can anyone please 
> confirm
> the latest rules about the prefix configuration? Reading through lots 
> of
> information the prefix should take the IPv4 address in Hex, 
> ab.cd.ef.gh/n and
> the tunnel address prefix should then be 2002:abcd:efgh:n::/64 and for 
> the
> usual IPv4 /32 this should make n=20 while my modem has provided an 
> auto-
> configured address where n=10. Have the rules for the fourth block been 
> changed
> so that it can now have any value? I have set this to 20 for now.
> I have read the RIPE NCC document "6to4 - Why is it so Bad"
> Thanks for any help.
> --
> Chris Bell
> Website http://chrisbell.org.uk

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