Hi, Simon and Albert: Thank both of you for quick response!
According to the man page online, the mode like “ra-only”, and “ra-stateless” are only used as part of “dhcp-range” option. However, this will also turn dnsmasq to DHCPv6 server, which I try to avoid. Would you please help me clarify how I can send RA on specific interfaces with the right flags? The only thing I can think of is leveraging “—ra-param”, but it doesn’t have place to put in mode keywords….. Thanks again! Shixiong On Jan 17, 2014, at 5:49 AM, Simon Kelley <si...@thekelleys.org.uk> wrote: > On 17/01/14 06:10, Albert ARIBAUD wrote: >> Le 17/01/2014 05:30, Shixiong Shang a écrit : >>> Hi, experts: >>> >>> Is it possible that dnsmasq can send out RA with either A=0, MO=1 >>> (i.e. for DHCPv6 Stateful), or AO=1, M=0 (i.e. for DHCPv6 Stateless) >>> WITHOUT dhcp-range? What I am trying to achieve here is using dnsmasq >>> to send out RA to trigger DHCPv6 Stateful or DHCPv6 Stateless mode >>> without acting as DHCPv6 server. Based on my reading, I am under the >>> impression that “—enable-ra” must be used with “—dhcp-range”. >>> Otherwise, dnsmasq will not send RA….. >> >> You are right about having to add enable-ra. >> >> However there is a syntax of dhcp-range which will not cause DHCPv6. >> >> As per 'man dnsmasq' (search for 'dhcp-range'), the possible modes for >> IPv6 ranges include 'ra-only', which will previsely enable RAs without >> enabling any DHCP. >> > > Neither of you are completely right. > > enable-ra causes RA with A=0 and M = 1 O = 1 on every interface that's doing > DHCP, just to instruct the clients to do stateful DHCP. It's intended as a > simple option for systems which don't use RA at all. > > You don't need to set enable-ra at all to do RA on specific interfaces with > other flag combinations, ie > > ra-only A=1 M=0 O=0 > slaac A=1 M=1 O=1 > ra-stateless A=1 M=0 O=1 > > Cheers, > > Simon. > _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
