dhcp6c config not working?

[misch]

Hi,

I upgraded to pfsense 2.4.3-RELEASE-p1 and IPv6 does not work any more. It seems that the /var/etc/dhcp6c_wan.conf is not written correctly.

1. When I use SLAAC on the WAN interface, my pfsense gets a global IPv6 address on that interface. dhcp6c config is:
   interface igb0 {
   information-only;
   request domain-name-servers;
   request domain-name;
   script "/var/etc/dhcp6c_wan_script.sh"; # we'd like some nameservers please
   };

dhcp6c daemon is running. Everything looks good up to this point.

2. when I set the WAN config to DHCP6 I get the config
   interface igb0 {
   send ia-na 0; # request stateful address
   send ia-pd 0; # request prefix delegation
   request domain-name-servers;
   request domain-name;
   script "/var/etc/dhcp6c_wan_script.sh"; # we'd like some nameservers please
   };
   id-assoc na 0 { };

but no process dhcp6c is running any more.

Where are the logs? Especially, where is the debug log?

[Derelict]

Check enable debug in the WAN interface config down in the DHCPv6 section.

Look at the DHCP log in Status > System Logs and filter on process dhcp6c.

[misch]

ok. I read the logs. But if the dhcp6c is not starting, why should there be anything the the logs?

[Gertjan]

@misch said in dhcp6c config not working?:

ok. I read the logs. But if the dhcp6c is not starting, why should there be anything the the logs?

For example : dhcp6c starts, but :

@misch said in dhcp6c config not working?:

It seems that the /var/etc/dhcp6c_wan.conf is not written correctly.

... the log would show dhcp6c starting, and stopping with probably a reason.

[misch]

Hi,

further investigation shows me the following.

When I configur SLAAC on my WAN interface, dhcp6c_wan.conf looks like:
interface igb0 {
information-only;
request domain-name-servers;
request domain-name;
script "/var/etc/dhcp6c_wan_script.sh"; # we'd like some nameservers please
};

But when I just change the config to DHCP6 then pfsense write the config file:
interface igb0 {
send ia-na 0; # request stateful address
send ia-pd 0; # request prefix delegation
request domain-name-servers;
request domain-name;
script "/var/etc/dhcp6c_wan_script.sh"; # we'd like some nameservers please
};
id-assoc na 0 { };

the dhcp6c daemon of course cannot parse this config file since the definition of ia-pd is missing. The error in the log tells me about that:
Sep 17 11:30:56 muc dhcp6c[30401]: /var/etc/dhcp6c_wan.conf:3 IA_PD (0) is not defined
Sep 17 11:30:56 muc dhcp6c[30401]: failed to parse configuration file

Haw can I fix this? My version is 2.4.3-p1

[misch]

Changing the config again deletes the dhcp6_wan.conf entirely, so no dhcp6c is started at all.

[jasonArloUser]

Hi

The reason this is happening is because you have id-assoc na but not id-assoc pd. This is because the config is not complete just from the WAN interface. You have to also set a LAN interface to track the WAN interface. This is where the rest of the configuration is set and it defines id-assoc pd with the values you set there.