OPNsense Forum
English Forums => 24.1 Production Series => Topic started by: paulwithonep on March 03, 2024, 05:04:21 pm
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I've been trying to track down an issue with opnsense 24.1.2 and my WAN connection dropping, and I noticed in the logs that dhclient is renewing frequently, about every 2-3 minutes. I enabled IPv6 info logging so it's a little bit more noisy than usual. I am unsure what to check next. Any ideas? Thanks in advance.
2024-03-03T08:54:30-07:00 Notice opnsense /usr/local/etc/rc.newwanipv6: No IP change detected (current: {redacted}, interface: wan)
2024-03-03T08:53:32-07:00 Notice dhclient dhclient-script: Creating resolv.conf
2024-03-03T08:53:32-07:00 Notice dhclient dhclient-script: Reason RENEW on igc3 executing
2024-03-03T08:53:24-07:00 Notice opnsense /usr/local/etc/rc.newwanipv6: No IP change detected (current: {redacted}, interface: wan)
2024-03-03T08:52:06-07:00 Notice opnsense /usr/local/etc/rc.newwanipv6: No IP change detected (current: {redacted}, interface: wan)
2024-03-03T08:51:07-07:00 Notice opnsense /usr/local/etc/rc.newwanipv6: No IP change detected (current: {redacted}, interface: wan)
2024-03-03T08:51:05-07:00 Notice dhcp6c got an expected reply, sleeping.
2024-03-03T08:51:05-07:00 Notice dhcp6c removing an event on igc3, state=RENEW
2024-03-03T08:51:05-07:00 Notice dhcp6c script "/var/etc/dhcp6c_wan_script.sh" terminated
2024-03-03T08:51:05-07:00 Notice dhcp6c dhcp6c_script: RENEW on igc3 executing
2024-03-03T08:51:05-07:00 Notice dhcp6c executes /var/etc/dhcp6c_wan_script.sh
2024-03-03T08:51:05-07:00 Notice dhcp6c update a prefix {redacted}::/56 pltime=600, vltime=1200
2024-03-03T08:51:05-07:00 Notice dhcp6c update an IA: PD-2
2024-03-03T08:51:05-07:00 Notice dhcp6c nameserver[1] {redacted}
2024-03-03T08:51:05-07:00 Notice dhcp6c nameserver[0] {redacted}
2024-03-03T08:51:05-07:00 Notice dhcp6c get DHCP option DNS, len 32
2024-03-03T08:51:05-07:00 Notice dhcp6c IA_PD prefix: {redacted}::/56 pltime=600 vltime=1200
2024-03-03T08:51:05-07:00 Notice dhcp6c get DHCP option IA_PD prefix, len 25
2024-03-03T08:51:05-07:00 Notice dhcp6c IA_PD: ID=2, T1=300, T2=480
2024-03-03T08:51:05-07:00 Notice dhcp6c get DHCP option IA_PD, len 41
2024-03-03T08:51:05-07:00 Notice dhcp6c DUID: {redacted}
2024-03-03T08:51:05-07:00 Notice dhcp6c get DHCP option server ID, len 10
2024-03-03T08:51:05-07:00 Notice dhcp6c DUID: {redacted}
2024-03-03T08:51:05-07:00 Notice dhcp6c get DHCP option client ID, len 14
2024-03-03T08:51:05-07:00 Notice dhcp6c receive reply from {redacted}::1 on igc3
2024-03-03T08:51:05-07:00 Notice dhcp6c send renew to ff02::1:2%igc3
2024-03-03T08:51:05-07:00 Notice dhcp6c set IA_PD
2024-03-03T08:51:05-07:00 Notice dhcp6c set IA_PD prefix
2024-03-03T08:51:05-07:00 Notice dhcp6c set option request (len 4)
2024-03-03T08:51:05-07:00 Notice dhcp6c set elapsed time (len 2)
2024-03-03T08:51:05-07:00 Notice dhcp6c set server ID (len 10)
2024-03-03T08:51:05-07:00 Notice dhcp6c set client ID (len 14)
2024-03-03T08:51:05-07:00 Notice dhcp6c a new XID (7d9492) is generated
2024-03-03T08:51:05-07:00 Notice dhcp6c reset a timer on igc3, state=RENEW, timeo=0, retrans=9384
2024-03-03T08:51:05-07:00 Notice dhcp6c IA timeout for PD-2, state=ACTIVE
2024-03-03T08:51:02-07:00 Notice dhclient dhclient-script: Creating resolv.conf
2024-03-03T08:51:02-07:00 Notice dhclient dhclient-script: Reason RENEW on igc3 executing
2024-03-03T08:50:14-07:00 Notice opnsense /usr/local/etc/rc.newwanipv6: No IP change detected (current: {redacted}, interface: wan)
2024-03-03T08:48:32-07:00 Notice dhclient dhclient-script: Creating resolv.conf
2024-03-03T08:48:32-07:00 Notice dhclient dhclient-script: Reason RENEW on igc3 executing
2024-03-03T08:48:23-07:00 Notice opnsense /usr/local/etc/rc.newwanipv6: No IP change detected (current: {redacted}, interface: wan)
2024-03-03T08:46:39-07:00 Notice opnsense /usr/local/etc/rc.newwanipv6: No IP change detected (current: {redacted}, interface: wan)
2024-03-03T08:46:07-07:00 Notice opnsense /usr/local/etc/rc.newwanipv6: No IP change detected (current: {redacted}, interface: wan)
... and it just repeats like this every few minutes.
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2024-03-03T08:51:05-07:00 Notice dhcp6c IA_PD prefix: {redacted}::/56 pltime=600 vltime=1200
2024-03-03T08:51:05-07:00 Notice dhcp6c get DHCP option IA_PD prefix, len 25
2024-03-03T08:51:05-07:00 Notice dhcp6c IA_PD: ID=2, T1=300, T2=480
Your log shows dhcp6c requested default lease time of 300s and max time of 480s. Your ISP granted you a preferred lifetime of 600s and max lifetime of 1200s. Those values are too short that's why it kept renewing.
Are you using a custom dhcp6c.conf? If not, can you post the content of your /var/etc/dhcp6c_wan.conf?
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Thanks for the reply. I am not using a custom dhcp6c.conf to my knowledge. Here is the conf file:
interface igc3 {
send ia-na 2; # request stateful address
send ia-pd 2; # 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 2 { };
id-assoc pd 2 {
prefix ::/56 infinity;
prefix-interface igc0 {
sla-id 0;
sla-len 8;
};
};
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Is there any special reason why you use IAID 2 instead of 0?
Maybe the offered lease time is too short because of this. Look at the "advanced" tab of the options, you can see and modify the IAID there.
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I just looked at my logs as i have been having disconnects and reboots a couple times a day. I found that my DHCP is renewing every 2 hours from my isp and that is when the issue happens. Similar issue to yours. I do not have any custom setting for lease for my wan.
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Your dhcpc6.conf seems normal. Could be your ISP side also possible that your ISP expects real values for both preferred life time & valid lifetime during request instead of 'infinity'.
Can you try to specify both values on dhcp6 config?
One way to do it is to copy your /var/etc/dhcpc6.conf to /var/etc/mydhcp6.conf, edit mydhcp6.conf and replace the line prefix ::/56 infinity; with prefix ::/56 86400 172800;
Then put /var/etc/mydhcp6.conf on your WAN>Config File Override>Configuration File Override field and reboot.
If it still doesn't get your a longer lease then I suggest you check with your ISP.
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I have the same problem with this but I am just using IPv4. My WAN drops out completely and I have to hard reboot the NUC. I get the same DHCP renewals on my logs but I am not sure it is the source of my WAN dropping out:
2024-03-11T16:13:41-04:00 Notice dhclient dhclient-script: Creating resolv.conf
2024-03-11T16:13:41-04:00 Notice dhclient dhclient-script: Reason RENEW on vtnet0 executing
2024-03-11T16:13:41-04:00 Error dhclient unknown dhcp option value 0x7d