[Dnsmasq-discuss] dhcp-host problem/questrions

[Gene Czarcinski]

I need dsmasq's dhcp service to provide "nailed" (that is, fixed) IPv4 
and IPv6 addresses to a NIC on a specific system.  My reasons for 
needing this are to have a single point where this is specified amd to 
keep the general general usefullness while having a fixed address that 
can be used fro routing.

For IPv4, I have been using something like:
dhcp-host=00:11:22:33:44:55,aloha,192.168.22.2,12h

and for IPv6, something like:
dhcp-host=alpha,[fd00:10:11:12::2:2],12h

THe dnsmasq man page implies that the following is possible but I have 
not tried it:
dhcp-host=00:11:22:33:44:55,alpha,192.168.22.2,12h,[fd00:10:11:12::2:2],12h

or maybe it should be specified as (I am not clear about this and have 
not tried it):
dhcp-host=00:11:22:33:44:55,alpha,192.168.22.2,[fd00:10:11:12::2:2],12h

OK for IPv4 with the MAC-address specification, this seems to work very 
reliably and I have not had a problem.  However for IPv6 where the only 
thing used is the host's name, I have had a undesirable incident (cause 
unknown) where the IPv6 got a valid IPv6 address assigned by DHCPv6 but 
it wass not the "nailed" address while the IPv4 address continue to have 
effect.

I believe that once alpha got the wrong IPv6 address, it continued to as 
k for it and dnsmasq continued to provide it rather than the "nailed" 
address.

Is there a way to for dnsmasq to hand out the "nailed" IPv6 address no 
matter what alpha is asking for?  If not a guarantee  the at least 
improve the chance that the right thing is done.

That last example above, is that a good way?  Or, do  I need to use the 
dhcpv6.client-id?

Gene