Hi Fred,
Fred Baker wrote:
how do the routers (which control router discovery) get this policy
information?
There's no existing mechanism for describing the source address
selection policies using router discovery.
For router discovery itself though, the configured IPv6
prefixes are typically configured through configuration files.
I'd guess there are proprietary MIBs to describe this as well.
I'm not sure anyone is doing it, but renumbering is applicable
there as a means of providing information about which prefixes
are valid.
I'd guess that any mechanism which interacted with router discovery
to provide address selection policy would need to be integrated with
the ND messages, and the configuration systems applicable to those
messages.
Greg.
On Aug 8, 2005, at 4:58 PM, Greg Daley wrote:
Hi Mark,
Mark K. Thompson wrote:
[cut]
So, yes, I agree that centralisation of address selection of policy
is important (and necessary for folks using ULAs with greater-than-
site scope multicast), and that DHCPv6 appears a reasonable choice,
but there are fundamental issues with RFC3484 that need to be
addressed at the outset.
I mentioned in the DHC session that prefix and routing configuration
decisions in IPv6 typically aren't controlled through DHC.
They are controlled through router discovery (RFC2461). More specific
routes and router selection are also performed by modifications to
ND Router Advertisement messages.
I therefore don't think it is a good fit to proceed with DHC options
for the purpose of source address selection default policy.
So I think I agree with you, that determination whether
centralized control is valid needs to occur, before delving into
solutions (solution looking for problems was heard in that session).
Greg
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