On maandag 15 augustus 2011 22:49:44 Olipro wrote: Please do not top post, see http://en.opensuse.org/openSUSE:Mailing_list_netiquette
Hi all,
I currently run a dual-stacked network and would like to say that you *MUST NOT* disable DHCPv6 by default - quite the opposite in fact, both DHCPv4 and v6 need to be enabled from the get-go with appropriate firewall rules.
Having a DHCPv6 client will not (and should not) interfere with SLAAC in any way since Router Advertisements will inform clients as to whether or not there is a running DHCPv6 server - any router that is indicating in RAs that it is running a DHCPv6 server when it in fact is not is effectively *broken* (or criminally misconfigured) and is something that needs to be fixed at source, not worked-around by default-disabling DHCPv6 for everyone else.
In this case the IPv6 implementation, used in openSUSE, does not properly use the Router Advertisement, when DHCP6 is active. Right at the start of the network service I have seen a Router Solicitation on which a Router Advertisement follows. However this advertisement, with the global IPv6 prefix, is ignored. A second Solicitation and following advertisement is seen and ignored. After that no Solicitation and Advertisement is seen. Only after about 10 minutes an unsolicited Router Advertisement is seen and at that moment the system establishes a global IPv6 address. Without enabling DHCP6 the system gets its global IPv6 address a few seconds after starting the network. See the bug report https://bugzilla.novell.com/show_bug.cgi?id=704666
Additionally, the author's assertion that DHCPv6 is always stateful is also false; you can have stateless DHCPv6 for assigning DNS, NTP etcetera, one need not assign addresses with DHCPv6 at all.
I was only referring to Stateless _Address_ Allocation. Currently, with IPv4 still around, these other allocations are less important in my view. The received Router Advertisement, also contains other data apart from the global prefix, information on a Recursive DNS Server, the MTU and Source link- layer address.
Regards, Oliver
-- fr.gr. Freek de Kruijf -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org For additional commands, e-mail: opensuse-factory+help@opensuse.org