RA & DHCP problem...

["Roger Jørgensen"]

Hi all,

Here is my summary from an online discussion. We know this affect alot of
different things, RFCs, documents, not to forget many religious views, but
_try_ to put all that aside for a while...



We all think it's time to address this reoccurring issue and discussion on
RAs and DHCP. RA isn't perfect, neither is DHCP but sometime there is a
need to use DHCP instead of RAs. In short - DHCP need to be able to supply
default gateway independing of RAs or no RAs. That is a client should be
able to get only in a IPv6 only network _if_ there is no RAs, only DHCP
there.


The core change we're suggesting are to change things so:

Supporting RAs is mandatory so no change there. However it is recommended
to have it on by default, but NOT mandatory. We're _only_ opening up so
anything else can provide defaultroute.

DHCP must support defaultroute and must be decoupled from RAs, no M-bit or
whatever.

If DHCP and RA shows up, all should be added to the routing table and the
kernel should sort it out. That is the implementer have a choice here but
that's a completely other discussion thread all together.



(tons of options on how DHCP and RAs can live together, all with their own
pitfalls. From the simple one that dhcpclient can disable the kernel from
accepting RAs with it's own pitfalls, to let the kernel sorting them out,
and over to preferring either one - RAs or DHCPs defaultroute)



-- 
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Roger Jorgensen      | - ROJO9-RIPE  - RJ1866P-NORID
roger at jorgensen.no   | - The Future is IPv6
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