I upgraded to this firmware a few days ago and noticed the same problems discussed here (disconnects, log errors, etc.), but I have good news.
Change to these settings:
WAN / Internet Connection / WAN DNS Setting / Connect to DNS Server automatically :No
- This improved my DNS lookup lag considerably by switching to OpenDNS servers. This had no effect on my disconnection issues however.
WAN / Internet Connection / Special Requirement from ISP / DHCP query frequency: Normal Mode
- This fixed my disconnection problems and cleared up the errors in System Log.
Additional info:
ISP: Comcast
Modem/Router: ARRIS TG862G (Rev. 5) in bridge Mode
It has been working flawlessly for two days now. Do these changes work for any of you?
Thank you. I believe this has helped my problem! I have an RT-AC87U, but after the firmware upgrade earlier in the month, I was having similar WAN issues. I also noticed that on the Android app, that 1/2 CPUs was pegged at 100%. Even after a reboot, it would go right back to maxing out. I was rebooting my modem (SB6141) and router several times a day.
I made the changes last night, and so far all seems to be working good. I changed to GoogleDNS instead of OpenDNS, but so far no WAN errors in the log. CPU(s) utilization seems to be back to normal. I still get plenty of the UDP warnings, and this kernel entries just popped up a few minutes ago, so I haven't looked too closely into those yet:
Jul 2 10:54:03 miniupnpd[3025]: Unknown udp packet received from 192.168.1.50:1900
Jul 2 10:54:03 miniupnpd[3025]: Unknown udp packet received from 192.168.1.50:1900
Jul 2 11:33:59 miniupnpd[3025]: Unknown udp packet received from 192.168.1.50:1900
Jul 2 11:33:59 miniupnpd[3025]: Unknown udp packet received from 192.168.1.50:1900
Jul 2 11:43:58 miniupnpd[3025]: Unknown udp packet received from 192.168.1.50:1900
Jul 2 11:43:58 miniupnpd[3025]: Unknown udp packet received from 192.168.1.50:1900
Jul 2 11:49:26 kernel: * Make sure sizeof(struct sw_struct)=160 is consistent
Jul 2 11:49:27 kernel: sizeof forward param = 160
Jul 2 11:50:33 kernel: Stop the IPS/AppID engine...
Jul 2 11:50:34 rc_service: bwdpi_check 449:notify_rc start_firewall
Jul 2 11:50:34 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth0_eth0)!
Jul 2 12:03:02 kernel: * Make sure sizeof(struct sw_struct)=160 is consistent
Jul 2 12:03:03 kernel: sizeof forward param = 160
Jul 2 12:03:15 kernel: Stop the IPS/AppID engine...
Jul 2 12:03:16 rc_service: bwdpi_check 449:notify_rc start_firewall
Jul 2 12:03:16 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth0_eth0)!
Jul 2 12:03:56 miniupnpd[3025]: Unknown udp packet received from 192.168.1.50:1900
Jul 2 12:03:56 miniupnpd[3025]: Unknown udp packet received from 192.168.1.50:1900
Thanks for the help on the WAN issues. I am going to post this over on AC87U forum for this firmware.
If anyone from Asus reads this -- your support sucks. I opened up two tickets and got a canned response that had nothing to do with my issue. When I responded to the support person via email I got no response back. It was a complete waste of time. You managed to screw something up across multiple routers with your latest firmware upgrade. You need to make sure your support team is aware, and develop a fix for this. I am going to be very reluctant to upgrade this firmware in the future (assuming this is finally stable with these settings).