1
23.7 Legacy Series / ipv4 WAN DHCP renews, loss of internet, unknown dhcp option value 0x52
« on: August 23, 2023, 09:14:14 pm »
Running OPNsense 23.7.1_3-amd64.
Dual WAN setup.
WAN_MTS_DHCP is FTTP, DHCP. The ISP has set the lease time at 10 minutes. This is the one with the issue.
WAN_SHAW_DHCP is Cable modem DCHP. The ISP set the lease time to 48 hours, no issues here.
Every 24 hours at the same time WAN_MTS_DHCP becomes unusable for a few minutes. This happens during the dhcp renewal, the IP and gateway don't change.
Of interest in the system log file for this renewal time only is the error: unknown dhcp option value 0x52
All of the other renewals at 5 min don't have this error. I suspect this error then causes the connection to no longer be usable until it can renew again.
Log entries below, it occured at 13:45:36-05:00
System log entries:
I had hoped to see something odd in /var/db/dhclient.leases.re0 with regards to dhcp option 82, but the contents don't have anyting.
contents of WAN_MTS_DHCP's /var/db/dhclient.leases.re0:
Dual WAN setup.
WAN_MTS_DHCP is FTTP, DHCP. The ISP has set the lease time at 10 minutes. This is the one with the issue.
WAN_SHAW_DHCP is Cable modem DCHP. The ISP set the lease time to 48 hours, no issues here.
Every 24 hours at the same time WAN_MTS_DHCP becomes unusable for a few minutes. This happens during the dhcp renewal, the IP and gateway don't change.
Of interest in the system log file for this renewal time only is the error: unknown dhcp option value 0x52
All of the other renewals at 5 min don't have this error. I suspect this error then causes the connection to no longer be usable until it can renew again.
Log entries below, it occured at 13:45:36-05:00
System log entries:
Code: [Select]
<13>1 2023-08-23T13:16:57-05:00 OPNsense.wallacemanor dhclient 90739 - [meta sequenceId="2"] Creating resolv.conf
<13>1 2023-08-23T13:17:00-05:00 OPNsense.wallacemanor send_telemetry.py 94583 - [meta sequenceId="3"] telemetry data collected 1 records in 0.02 seconds @2023-08-23 18:16:30.112420
<13>1 2023-08-23T13:21:00-05:00 OPNsense.wallacemanor send_telemetry.py 24392 - [meta sequenceId="1"] telemetry data collected 1 records in 0.02 seconds @2023-08-23 18:20:53.370728
<13>1 2023-08-23T13:21:57-05:00 OPNsense.wallacemanor dhclient 14227 - [meta sequenceId="2"] Creating resolv.conf
<13>1 2023-08-23T13:22:00-05:00 OPNsense.wallacemanor send_telemetry.py 64045 - [meta sequenceId="3"] telemetry data collected 1 records in 0.02 seconds @2023-08-23 18:21:28.719045
<13>1 2023-08-23T13:26:57-05:00 OPNsense.wallacemanor dhclient 86446 - [meta sequenceId="1"] Creating resolv.conf
<13>1 2023-08-23T13:28:00-05:00 OPNsense.wallacemanor send_telemetry.py 20817 - [meta sequenceId="1"] telemetry data collected 1 records in 0.02 seconds @2023-08-23 18:27:43.847688
<13>1 2023-08-23T13:31:57-05:00 OPNsense.wallacemanor dhclient 52426 - [meta sequenceId="1"] Creating resolv.conf
<13>1 2023-08-23T13:33:00-05:00 OPNsense.wallacemanor send_telemetry.py 4797 - [meta sequenceId="1"] telemetry data collected 1 records in 0.02 seconds @2023-08-23 18:32:43.727757
<13>1 2023-08-23T13:34:00-05:00 OPNsense.wallacemanor send_telemetry.py 29824 - [meta sequenceId="2"] telemetry data collected 3 records in 0.02 seconds @2023-08-23 18:33:07.500776
<13>1 2023-08-23T13:36:58-05:00 OPNsense.wallacemanor dhclient 27783 - [meta sequenceId="1"] Creating resolv.conf
<13>1 2023-08-23T13:37:00-05:00 OPNsense.wallacemanor send_telemetry.py 32450 - [meta sequenceId="2"] telemetry data collected 1 records in 0.02 seconds @2023-08-23 18:36:23.084067
<13>1 2023-08-23T13:41:58-05:00 OPNsense.wallacemanor dhclient 48610 - [meta sequenceId="1"] Creating resolv.conf
<13>1 2023-08-23T13:44:00-05:00 OPNsense.wallacemanor send_telemetry.py 21680 - [meta sequenceId="1"] telemetry data collected 1 records in 0.02 seconds @2023-08-23 18:43:35.180707
<27>1 2023-08-23T13:45:36-05:00 OPNsense.wallacemanor dhclient 50343 - [meta sequenceId="1"] unknown dhcp option value 0x52
<13>1 2023-08-23T13:45:36-05:00 OPNsense.wallacemanor dhclient 66904 - [meta sequenceId="2"] Creating resolv.conf
<13>1 2023-08-23T13:45:45-05:00 OPNsense.wallacemanor opnsense 82037 - [meta sequenceId="3"] /usr/local/etc/rc.routing_configure: ROUTING: entering configure using defaults
<13>1 2023-08-23T13:45:45-05:00 OPNsense.wallacemanor opnsense 82037 - [meta sequenceId="4"] /usr/local/etc/rc.routing_configure: ROUTING: configuring inet default gateway on opt2
<13>1 2023-08-23T13:45:45-05:00 OPNsense.wallacemanor opnsense 82037 - [meta sequenceId="5"] /usr/local/etc/rc.routing_configure: ROUTING: keeping current inet default gateway '142.161.<removed>'
<13>1 2023-08-23T13:46:00-05:00 OPNsense.wallacemanor send_telemetry.py 93735 - [meta sequenceId="6"] telemetry data collected 2 records in 0.02 seconds @2023-08-23 18:45:59.098543
<13>1 2023-08-23T13:46:19-05:00 OPNsense.wallacemanor opnsense 19845 - [meta sequenceId="7"] /usr/local/etc/rc.routing_configure: ROUTING: entering configure using defaults
<13>1 2023-08-23T13:46:19-05:00 OPNsense.wallacemanor opnsense 19845 - [meta sequenceId="8"] /usr/local/etc/rc.routing_configure: ROUTING: ignoring down gateways: WAN_MTS_DHCP
<13>1 2023-08-23T13:46:19-05:00 OPNsense.wallacemanor opnsense 19845 - [meta sequenceId="9"] /usr/local/etc/rc.routing_configure: ROUTING: configuring inet default gateway on opt1
<13>1 2023-08-23T13:46:19-05:00 OPNsense.wallacemanor opnsense 19845 - [meta sequenceId="10"] /usr/local/etc/rc.routing_configure: ROUTING: setting inet default route to 24.77.<removed>
<13>1 2023-08-23T13:47:00-05:00 OPNsense.wallacemanor send_telemetry.py 16802 - [meta sequenceId="11"] telemetry data collected 2 records in 0.02 seconds @2023-08-23 18:45:59.098543
<13>1 2023-08-23T13:47:10-05:00 OPNsense.wallacemanor opnsense 43418 - [meta sequenceId="12"] /usr/local/etc/rc.routing_configure: ROUTING: entering configure using defaults
<13>1 2023-08-23T13:47:10-05:00 OPNsense.wallacemanor opnsense 43418 - [meta sequenceId="13"] /usr/local/etc/rc.routing_configure: ROUTING: configuring inet default gateway on opt2
<13>1 2023-08-23T13:47:10-05:00 OPNsense.wallacemanor opnsense 43418 - [meta sequenceId="14"] /usr/local/etc/rc.routing_configure: ROUTING: setting inet default route to 142.161.<removed>
<13>1 2023-08-23T13:47:17-05:00 OPNsense.wallacemanor dhclient 60872 - [meta sequenceId="15"] Creating resolv.conf
<13>1 2023-08-23T13:47:21-05:00 OPNsense.wallacemanor opnsense 65721 - [meta sequenceId="16"] /usr/local/etc/rc.routing_configure: ROUTING: entering configure using defaults
<13>1 2023-08-23T13:47:21-05:00 OPNsense.wallacemanor opnsense 65721 - [meta sequenceId="17"] /usr/local/etc/rc.routing_configure: ROUTING: configuring inet default gateway on opt2
<13>1 2023-08-23T13:47:21-05:00 OPNsense.wallacemanor opnsense 65721 - [meta sequenceId="18"] /usr/local/etc/rc.routing_configure: ROUTING: keeping current inet default gateway '142.161.<removed>'
<13>1 2023-08-23T13:51:00-05:00 OPNsense.wallacemanor send_telemetry.py 45205 - [meta sequenceId="1"] telemetry data collected 1 records in 0.02 seconds @2023-08-23 18:50:52.628503
<13>1 2023-08-23T13:52:00-05:00 OPNsense.wallacemanor send_telemetry.py 70388 - [meta sequenceId="2"] telemetry data collected 21 records in 0.02 seconds @2023-08-23 18:51:55.425587
<13>1 2023-08-23T13:52:17-05:00 OPNsense.wallacemanor dhclient 93970 - [meta sequenceId="3"] Creating resolv.conf
<13>1 2023-08-23T13:53:00-05:00 OPNsense.wallacemanor send_telemetry.py 28448 - [meta sequenceId="4"] telemetry data collected 6 records in 0.02 seconds @2023-08-23 18:52:12.366204
I had hoped to see something odd in /var/db/dhclient.leases.re0 with regards to dhcp option 82, but the contents don't have anyting.
contents of WAN_MTS_DHCP's /var/db/dhclient.leases.re0:
Code: [Select]
lease {
interface "re0";
fixed-address 142.161.<removed>;
option subnet-mask 255.255.248.0;
option routers 142.161.<removed>;
option domain-name-servers 216.130.71.71,216.130.71.72;
option dhcp-lease-time 600;
option dhcp-message-type 5;
option dhcp-server-identifier 192.168.100.254;
renew 3 2023/8/23 18:36:57;
rebind 3 2023/8/23 18:40:42;
expire 3 2023/8/23 18:41:57;
}
lease {
interface "re0";
fixed-address 142.161.<removed>;
option subnet-mask 255.255.248.0;
option routers 142.161.<removed>;
option domain-name-servers 216.130.71.71,216.130.71.72;
option dhcp-lease-time 600;
option dhcp-message-type 5;
option dhcp-server-identifier 192.168.100.254;
renew 3 2023/8/23 18:41:58;
rebind 3 2023/8/23 18:45:43;
expire 3 2023/8/23 18:46:58;
}
lease {
interface "re0";
fixed-address 142.161.<removed>;
option subnet-mask 255.255.248.0;
option routers 142.161.<removed>;
option domain-name-servers 216.130.71.71,216.130.71.72;
option dhcp-lease-time 600;
option dhcp-message-type 5;
option dhcp-server-identifier 192.168.100.254;
renew 3 2023/8/23 18:46:58;
rebind 3 2023/8/23 18:50:43;
expire 3 2023/8/23 18:51:58;
}
lease {
interface "re0";
fixed-address 142.161.<removed>;
option subnet-mask 255.255.248.0;
option routers 142.161.<removed>;
option domain-name-servers 216.130.71.71,216.130.71.72;
option dhcp-lease-time 600;
option dhcp-message-type 5;
option dhcp-server-identifier 192.168.100.254;
renew 3 2023/8/23 18:52:17;
rebind 3 2023/8/23 18:56:02;
expire 3 2023/8/23 18:57:17;
}