Re: Confirmation to advance: draft-ietf-6man-ipv6only-flag-05

[Philip Homburg <[e-mail]>]

>The most obvious thing
>to do with it would be to reduce the DHCP  client exponential backoff or
>perhaps even give up on DHCP altogether if it did not succeed within a
>given timeout.

I think there are already plenty of other hints that can be used to backoff
DHCP:
1) If the host has working IPv6 and working IPv4aaS then it can agressively
   backoff DHCPv4 or give up.
2) If a host has working IPv6 it can agressively backoff DHCPv4 until it 
   first resolves a domain that only has an A record and no AAAA (or there is
   another reason to connect to an IPv4 address)
3) In theory, but I don't know if there are operational issues with this,
   if a host sees DHCPv4 discovers from other hosts and no offers then the
   host can agressively backoff DHCPv4. When the host sees an offer it can
   try again.