[libvirt] libvirt support for dhcp6 .. not time soon

[Gene Czarcinski]

Well, so much for libvirt support for stateful IPv6 addresses (dhcp6).  
Not with the current design/implementation.

The problem is UPD6 server port 547 or rather how it is used.  I am not 
sure what the technical details are yet nor if this is "fixable", but as 
the situation now stands, there can be only one dhcp6 server on a 
system.  DHCPD6 cannot live with dnsmasq and dnsmasq cannot live with 
another dnsmasq ... first one started grabs the port and the others die 
because they cannot get exclusive use.

I suppose you could run one dnsmasq which supported all virtual networks 
but things are going to get messy when virtual networks are 
started/destroyed/whatever.

I kludged together a little patch for libvirt which forced a dhcp-range 
specification for any net with an ipv6 definition.

If anyone has some insight into this, I would appreciate hearing able it.

If anyone knew that you could not run two or more dhcp6 servers on the 
same system, I realy wish that information was more widely known (or 
obvious).

Gene