WAN Connection: ISP's DHCP did not function properly. (RT-AC5300)

[Logi]

I am using the latest FW from Asus 3.0.0.4.380_3341 (from last week) and I am getting in the logs the following error messages almost every hour, sometimes even more frequent, any idea what could be the root cause? With previous Asus and Merlin FWs I never had those errors in the system long, the Modem (SB6120) and ISP (Comcast cable) are the same:

May 29 21:18:11 WAN Connection: ISP's DHCP did not function properly.
May 29 21:18:11 DualWAN: skip single wan wan_led_control - WANRED off
May 29 21:18:11 stop_nat_rules: apply the redirect_rules!
May 29 21:19:33 WAN Connection: WAN was restored.
May 29 21:19:33 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth0_eth0)!

Thanks

 

[mstombs]

I think you can safely ignore the "ISPs DHCP did not function properly", Asuswrt firmware has always had that for me - it comes from here, but doesn't help me...

https://github.com/RMerl/asuswrt-merlin/blob/master/release/src/router/rc/wanduck.c#L1941

However frequent wan disconnects/reconnects are not good, is your cable connection solid? You have a message about dualwan - so could be due to failover or fallback detection?

 

[Logi]

It was working fine since yesterday 10PM, but suddenly today again the same problem, for a much longer period of time though:

May 30 14:19:13 WAN Connection: ISP's DHCP did not function properly.
May 30 14:19:13 DualWAN: skip single wan wan_led_control - WANRED off
May 30 14:19:13 stop_nat_rules: apply the redirect_rules!
May 30 14:19:55 WAN Connection: WAN was restored.
May 30 14:19:55 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth0_eth0)!
May 30 14:20:03 WAN Connection: ISP's DHCP did not function properly.
May 30 14:20:03 DualWAN: skip single wan wan_led_control - WANRED off
May 30 14:20:03 stop_nat_rules: apply the redirect_rules!
May 30 14:20:39 WAN Connection: WAN was restored.
May 30 14:20:39 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth0_eth0)!
May 30 14:20:58 WAN Connection: ISP's DHCP did not function properly.
May 30 14:20:58 DualWAN: skip single wan wan_led_control - WANRED off
May 30 14:20:58 stop_nat_rules: apply the redirect_rules!
May 30 14:21:28 WAN Connection: WAN was restored.
May 30 14:21:28 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth0_eth0)!
May 30 14:23:28 WAN Connection: ISP's DHCP did not function properly.
May 30 14:23:28 DualWAN: skip single wan wan_led_control - WANRED off
May 30 14:23:28 stop_nat_rules: apply the redirect_rules!
May 30 14:23:51 WAN Connection: WAN was restored.
May 30 14:23:51 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth0_eth0)!
May 30 14:25:12 WAN Connection: ISP's DHCP did not function properly.
May 30 14:25:12 DualWAN: skip single wan wan_led_control - WANRED off
May 30 14:25:12 stop_nat_rules: apply the redirect_rules!
May 30 14:25:13 WAN Connection: WAN was restored.
May 30 14:25:13 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth0_eth0)!
May 30 14:25:55 WAN Connection: ISP's DHCP did not function properly.
May 30 14:25:55 DualWAN: skip single wan wan_led_control - WANRED off
May 30 14:25:55 stop_nat_rules: apply the redirect_rules!
May 30 14:26:00 WAN Connection: WAN was restored.
May 30 14:26:00 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth0_eth0)!

 

[Logi]

I think you can safely ignore the "ISPs DHCP did not function properly", Asuswrt firmware has always had that for me - it comes from here, but doesn't help me...

https://github.com/RMerl/asuswrt-merlin/blob/master/release/src/router/rc/wanduck.c#L1941

However frequent wan disconnects/reconnects are not good, is your cable connection solid? You have a message about dualwan - so could be due to failover or fallback detection?

I do not have Dual WAN enabled, only the standard connection to the Modem

 

[Hard.Wired]

Different router (RT-AC3200), but the same problem and I was able to fix it (for now) here...

ASUS RT-AC3200 Firmware 3.0.0.4.380.3479