RobT

 lan1, lan2 and 2 VLANs are all Class C /24. lan1 has infinite lease, lan2 has 2-day lease, VLAN1has 14-day lease and VLAN 2 has 1 day lease (guest network). DHCP reservation is used in place of static IP addresses.

@Zyxel_Kevin After upgrading to the latest weekly firmware, I'm still experiencing DHCP issues where it stops serving out IP addresses.

@mMontana Thanks for your quick reply! @Zyxel_Kevin sent me V4.72(AAAA.0)ITS-22WK20-2022-05-23-220500939 after he remotely logged into the router and found that the App-watch-dog needed a 3 minute interval to check daemons. When I upgraded to V4.72(AAAA.0)ITS-22WK20-2022-05-23-220500939 from V4.71 the DHCP server worked…

@Zyxel_Kevin I upgraded the firmware to 4.72(AAAA.0)C0 and the router started to experience DHCP issues again where it would no longer serve out IP addresses. I reinstalled V4.72(AAAA.0)ITS-22WK20-2022-05-23-220500939 but the DHCP server also stops working after about a day.

@Zyxel_Kevin about 2 days after installing the new firmware, the DHCP server has stopped working again: Router> debug system ps | match "dhc" 24561 1 dhcpcd_request root ? 19 0 0.0 0.0 Ss 2028 516 364 507 08:26:26 08:23:02 00:00:26 /usr/local/sbin/dhcpcd_request eth0 0 ZyWALL 11024595 1 dhcpcd root ? 19 0 0.0 0.0 Ss 1836…

Hi @Zyxel_Kevin I installed the weekly update and I'm now testing it. I'll post the test results.

I confirmed that firmware version is 4.71(AAAA.0).

@Zyxel_Emily I'm experiencing a similar problem with my Zywall 110 where after about 3 days the DHCP server appears to stop working. I ran the debug system command when the DHCP server was working and when it wasn't. Here's the output: Working: Router> debug system ps | match "dhc"14319 1 dhcpd root ? 19 0 0.0 0.1 Ss 8628…