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.

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.

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.