On Thu, 30 Oct 2008, [EMAIL PROTECTED] wrote:
Consider cellular host case:
- host implements e.g. ND proxy and DHCPv6 PD for WAN connection
sharing
- host attaches to a network where only DHCPv6 happens to be used
- host gets single /128 IPv6 address from DHCPv6
- host tries to get some prefixes for its LAN interface with DHCPv6
PD, but network's policy rejects the prefix request
...
IMHO network that is giving out only /128 to hosts that are providing
"network sharing feature" is forcefully creating "localized IPv6 address
space exhaustion scenario" for the hosts, which I fear may be tackled
with mechanisms familiar from IPv4 address exhaustion scenarios, i.e.
with IPv6 NAPT.
FWIW, I agree this would be a problem.
But, maybe there is an implementable workaround to this operational
issue. Would it be possible for the host to either 1) run DHCPv6
again, with a different DUID or client identifier (could it get more
/128's that way, or 2) use DHCPv6 IAs to request multiple addresses?
Then it would proxy these specific addresses instead of a whole /64.
If neither of these is possible, how would this scenario be different
from the mobile terminal operating as a L2 bridge and multiple devices
behind it requesting addresses with DHCPv6?
--
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
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