dhcpcd-discuss

Hi

On 2014-07-28 01:40, Spyros Stathopoulos wrote:
> Under 6.4.x I get the same but immediately after
>
> ppp0: adding reject route to (same prefix as the ADV line above) via
> ::1
>
> ppp0: adding route to (same prefix again)
>
> and my internal interface (int0, lan facing) has the same prefix as
> the ADV line but always ends in :1 instead of the MAC-based ipv6 that
> is usually assigned.
>
> Is this a bug or are there any route specific changes in 6.4.x that I
> have missed? Please tell me if any more information is required. Any
> ideas to debug?

From the changeset of 6.4.0 I posted to the list:
http://roy.marples.name/archives/dhcpcd-discuss/2014/0687.html

   * If not specified, Delegated Prefixes will get an automatic SLA of
the interface index. If the biggest SLA and the assigned prefix fits
into a /64 then dhcpcd creates a /64 prefix so that SLAAC works. If
bigger than /64 is needed then dhcpcd creates one rounded upto the
nearest multiple of 8. Unless a configured SLA of 0 is assigned, a
reject route for the Delegated Prefix is installed to stop unassigned
addresses trying to be resolved upstream. Addresses added from Delegated
Prefixes now have a default address suffix of 1 instead of using a SLAAC
style address.

The reason why dhcpcd just adds 1 to the prefix is because the prefix we 
get may not always be a /64.
As /64 is required for RA/RS and mac based SLAAC, but that isn't a 
requirement of Prefix Delegation as a DHCPv6 address could easily be 
assigned from a /90 pool if needed.

I suppose the question becomes, how are you advertising the prefix from 
your delegation to your LAN?
If it's a fixed configuration file with a fixed default router ip then 
it will need changing.
On NetBSD rtadvd works fine with dhcpcd as it stands, and no fixed 
config is required.

Thanks

Roy