On 1/5/22 4:57 PM, Simon Kelley wrote:
On 03/01/2022 21:55, Eric Dittman via Dnsmasq-discuss wrote:
I have a Ubiquiti UDM SE. It uses dnsmasq for DNS, DHCP, and RAs. I
have external DNS and DHCP servers so I want to send RA packets with
the M and O flags set and the A flag reset, but I can't figure out the
proper configuration to do that. Right now just to get RA working on
the subnets for IPv6 I have the following:
enable-ra
ra-param=*,high,0
domain=mydomain
dhcp-range=2001:470:xxxx::,ra-names,slaac
dhcp-range=2001:470:xxxx:10::,ra-names,slaac
dhcp-range=2001:470:xxxx:20::,ra-names,slaac
dhcp-range=2001:470:xxxx:40::,ra-names,slaac
I'm getting autoconf IPv6 addresses but I'm not seeing any DHCPv6
packets on the external DHCPv6 servers (a pair per subnet).
Any ideas how I can get this working?
The dnsmasq RA code was designed to work with the dnsmasq DHCPv6 server,
so there's no direct support for this. I think the closest you can get
is to configure a static-addresses-only dhcp range
dhcp-range=2001:470:xxxx:10::,static,slaac
Which will not allocate any DHCPv6 leases, leaving the field open for
you other DHCPv6 servers, but will set the M and O bits.
Adding a new keyword to cover this circumstance is pretty straightforward.
Thanks, Simon, that worked! I really appreciate it.
The only issue I'm having now is I'm getting the router link-local IPv6
address included along with the two IPv6 addresses I specify in the
DHCPv6 options for the DNS resolvers:
nameserver 2001:470:xxxx:10::105
nameserver 2001:470:xxxx:10::106
nameserver fe80::300d:e6ff:fe85:e6e0
nameserver 10.0.10.105
nameserver 10.0.10.106
--
Eric Dittman
_______________________________________________
Dnsmasq-discuss mailing list
Dnsmasq-discuss@lists.thekelleys.org.uk
https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
