On Sun, Jun 16, 2013 at 10:55 AM, Thomas Bächler firstname.lastname@example.org wrote:
Am 16.06.2013 10:35, schrieb Jouke Witteveen:
What this doesn't mention is that it also reads DNS servers from Router Advertisements, which the kernel cannot do by itself. dhcpcd does not perform dhcpv6 as far as I know.
I'm not sure; it might do so nowadays. Does dhclient read DNS servers from RAs in IPv4 mode?
I haven't check what dhclient does, but dhcpcd is definitely not a dhcpv6 client.
It says it is
IMO, we should remove the -4 flag from dhcpcd if IP6=stateless is set.
The flag was added because in most situations leaving it out causes a timeout in acquiring an IPv6 lease.
My initial thoughts: : If dhclient doesn't extract the addresses from RAs in IPv6 mode, we shouldn't expect dhcpcd to do so : If dhclient does, this might be a bug in dhcpcd
dhclient != dhcpcd. dhclient has a complete dhcpv6 implementation, including prefix delegation, while dhcpcd is only a dhcp and ipv6 router solicitation client.
My problem here is that the kernel cannot handle the extended information in RAs, like DNS. We need a client to do so and dhcpcd is the only one I know.
In that case, it would be nice if dhcpcd allowed more control over what it does do and what it doesn't. In IPv4-only configurations, I don't want dhcpcd to assign an IPv6 address.