Deco M4 in AP mode suddenly crashing router/network
Hi everyone. Since a couple of days my network setup with Deco M4's has started acting up and I’m struggling to pin down why. Nothing obvious changed, but the Decos and/or my router now suddenly start “crashing” (network freezes and router and deco reboot/freeze). My Decos are running in Access Point mode.
What makes this confusing is that my router and the rest of the network seem completely stable when the Decos are not involved. If I unplug the Decos and run only the router, everything works normally. As soon as I connect the Decos again, the instability returns. That’s why I’m wondering if this is either a Deco issue, or a specific interaction between the Decos and my router or network settings.
I’m looking for ideas on how to properly diagnose this instead of randomly changing settings. What are the best checks to run to figure out where this is suddenly comming from. If it helps, I can also look at logs around the time it crashes, but I’m not sure what to look for.
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Logs of the main deco around the time the crash happens
Fri Jan 16 23:48:14 2026 daemon.notice conn-indicator: Invoke led: conn[1]
Fri Jan 16 23:48:14 2026 daemon.notice conn-indicator: Connectivity changed: ONLINE(0x0) -> OFFLINE(0x1)
Fri Jan 16 23:48:14 2026 user.notice smartip: [lan] AP mode AP online status changed(ONLINE --> OFFLINE).
Fri Jan 16 23:48:14 2026 user.notice smartip: [lan] stop domain_login
Fri Jan 16 23:48:14 2026 user.err smartip: [lan] !!ip addr del!! ip addr del 192.168.178.100 dev br-lan
Fri Jan 16 23:48:15 2026 user.notice smartip: [lan] route del default dev br-lan
Fri Jan 16 23:48:15 2026 user.notice smartip: [lan] smartipd restart udhcpc
Fri Jan 16 23:48:15 2026 user.notice smartip: [lan] kill process udhcpc
Fri Jan 16 23:48:15 2026 daemon.err udhcpc[5059]: bind(UDP): Cannot assign requested address
Fri Jan 16 23:48:15 2026 daemon.err udhcpc[5059]: Received SIGTERM
Fri Jan 16 23:48:15 2026 user.err syslog: Error: ssh_connect: Failed to connect: Network is unreachable
Fri Jan 16 23:48:15 2026 user.err syslog: Error: connect
Fri Jan 16 23:48:16 2026 daemon.err udhcpc[21596]: udhcpc (v1.22.1) started
Fri Jan 16 23:48:16 2026 daemon.err udhcpc[21596]: Sending discover...
Fri Jan 16 23:48:16 2026 daemon.err udhcpc[21596]: Sending select for 192.168.178.100...
Fri Jan 16 23:48:16 2026 user.notice smartip: [lan] start udhcpc
Fri Jan 16 23:48:16 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:48:17 2026 user.notice smartip: [lan] detect sucess to update lanIp and write dns file
Fri Jan 16 23:48:17 2026 user.notice smartip: [lan] Notify the lan ip changed.
Fri Jan 16 23:48:17 2026 user.notice smartip: [lan] config IP: ifconfig br-lan 192.168.178.100 netmask 255.255.255.0
Fri Jan 16 23:48:17 2026 user.notice smartip: [lan] route del default dev br-lan
Fri Jan 16 23:48:17 2026 user.notice smartip: [lan] route add default gw 192.168.178.1
Fri Jan 16 23:48:18 2026 user.notice smartip: [lan] /etc/init.d/guest_eth reload gw 192.168.178.1
Fri Jan 16 23:48:18 2026 user.notice smartip: [lan] restart miniupnpd
Fri Jan 16 23:48:18 2026 user.notice smartip: [lan] Send Message -- TYPE:lan, EVENT:UPDATE
Fri Jan 16 23:48:18 2026 user.emerg syslog: tp217,505[21646]:
Fri Jan 16 23:48:18 2026 user.notice smartip: [lan] restart domain_login
Fri Jan 16 23:49:55 2026 user.notice smartip: [lan] Ap System Ap Mode, connect interface changed, link_status:20, record inf:10.
Fri Jan 16 23:49:55 2026 user.notice smartip: [lan] stop domain_login
Fri Jan 16 23:49:55 2026 user.err smartip: [lan] !!ip addr del!! ip addr del 192.168.178.100 dev br-lan
Fri Jan 16 23:49:55 2026 user.notice smartip: [lan] route del default dev br-lan
Fri Jan 16 23:49:55 2026 user.notice smartip: [lan] smartipd restart udhcpc
Fri Jan 16 23:49:55 2026 user.notice smartip: [lan] kill process udhcpc
Fri Jan 16 23:49:55 2026 daemon.err udhcpc[21600]: Received SIGTERM
Fri Jan 16 23:49:56 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:49:56 2026 user.notice smartip: [lan] start udhcpc
Fri Jan 16 23:49:56 2026 daemon.err udhcpc[23125]: udhcpc (v1.22.1) started
Fri Jan 16 23:49:56 2026 daemon.err udhcpc[23125]: Sending discover...
Fri Jan 16 23:49:57 2026 user.notice smartip: [lan] Ap System Ap Mode, connecter interface changed, prelink_status:0x20, curlink_satus:0x30.
Fri Jan 16 23:49:58 2026 user.notice smartip: [lan] stop domain_login
Fri Jan 16 23:49:58 2026 user.err smartip: [lan] !!ip addr del!! ip addr del 192.168.178.100 dev br-lan
Fri Jan 16 23:49:58 2026 user.notice smartip: [lan] route del default dev br-lan
Fri Jan 16 23:49:58 2026 user.notice smartip: [lan] smartipd restart udhcpc
Fri Jan 16 23:49:58 2026 user.notice smartip: [lan] kill process udhcpc
Fri Jan 16 23:49:58 2026 daemon.err udhcpc[23125]: Received SIGTERM
Fri Jan 16 23:49:58 2026 daemon.notice netifd: VLAN 'eth0.1' link is up
Fri Jan 16 23:49:59 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:49:59 2026 daemon.err udhcpc[23166]: udhcpc (v1.22.1) started
Fri Jan 16 23:49:59 2026 daemon.err udhcpc[23166]: Sending discover...
Fri Jan 16 23:49:59 2026 user.notice smartip: [lan] start udhcpc
Fri Jan 16 23:50:00 2026 daemon.warn awn[1583]: [awnd_update_lanip:2168]: get lan ip failed
Fri Jan 16 23:50:01 2026 daemon.err wandetect3: neigh entry not found
Fri Jan 16 23:50:02 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:50:02 2026 daemon.err udhcpc[23166]: Sending discover...
Fri Jan 16 23:50:03 2026 user.err syslog: Error: ssh_connect: Failed to connect: Network is unreachable
Fri Jan 16 23:50:03 2026 user.err syslog: Error: connect
Fri Jan 16 23:50:04 2026 daemon.err wandetect3: neigh entry not found
Fri Jan 16 23:50:05 2026 user.err syslog: Error: ssh_connect: Failed to connect: Network is unreachable
Fri Jan 16 23:50:05 2026 user.err syslog: Error: connect
Fri Jan 16 23:50:05 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:50:05 2026 daemon.err udhcpc[23166]: Sending discover...
Fri Jan 16 23:50:07 2026 daemon.err wandetect3: neigh entry not found
Fri Jan 16 23:50:08 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:50:10 2026 daemon.err awn[1583]: [awn_get_lan_ip:366]: ioctl error
Fri Jan 16 23:50:10 2026 daemon.warn awn[1583]: [awnd_update_lanip:2168]: get lan ip failed
Fri Jan 16 23:50:10 2026 daemon.err wandetect3: neigh entry not found
Fri Jan 16 23:50:11 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:50:11 2026 user.notice smartip: [lan] Ap System Ap Mode, connecter interface changed, prelink_status:0x30, curlink_satus:0x20.
Fri Jan 16 23:50:12 2026 user.notice smartip: [lan] stop domain_login
Fri Jan 16 23:50:12 2026 user.err smartip: [lan] !!ip addr del!! ip addr del 192.168.178.100 dev br-lan
Fri Jan 16 23:50:12 2026 user.notice smartip: [lan] route del default dev br-lan
Fri Jan 16 23:50:12 2026 user.notice smartip: [lan] smartipd restart udhcpc
Fri Jan 16 23:50:12 2026 user.notice smartip: [lan] kill process udhcpc
Fri Jan 16 23:50:12 2026 daemon.err udhcpc[23166]: Received SIGTERM
Fri Jan 16 23:50:12 2026 daemon.notice netifd: VLAN 'eth0.1' link is down
Fri Jan 16 23:50:13 2026 daemon.err udhcpc[23358]: udhcpc (v1.22.1) started
Fri Jan 16 23:50:13 2026 daemon.err udhcpc[23358]: Sending discover...
Fri Jan 16 23:50:13 2026 user.notice smartip: [lan] start udhcpc
Fri Jan 16 23:50:13 2026 daemon.err wandetect3: neigh entry not found
Fri Jan 16 23:50:14 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:50:14 2026 user.notice smartip: [lan] Ap System Ap Mode, connecter interface changed, prelink_status:0x20, curlink_satus:0x30.
Fri Jan 16 23:50:14 2026 user.notice smartip: [lan] stop domain_login
Fri Jan 16 23:50:14 2026 user.err smartip: [lan] !!ip addr del!! ip addr del 192.168.178.100 dev br-lan
Fri Jan 16 23:50:14 2026 user.notice smartip: [lan] route del default dev br-lan
Fri Jan 16 23:50:14 2026 user.notice smartip: [lan] smartipd restart udhcpc
Fri Jan 16 23:50:14 2026 user.notice smartip: [lan] kill process udhcpc
Fri Jan 16 23:50:14 2026 daemon.err udhcpc[23358]: Received SIGTERM
Fri Jan 16 23:50:15 2026 daemon.notice netifd: VLAN 'eth0.1' link is up
Fri Jan 16 23:50:15 2026 user.notice smartip: [lan] start udhcpc
Fri Jan 16 23:50:15 2026 daemon.err udhcpc[23383]: udhcpc (v1.22.1) started
Fri Jan 16 23:50:15 2026 daemon.err udhcpc[23383]: Sending discover...
Fri Jan 16 23:50:16 2026 daemon.err wandetect3: neigh entry not found
Fri Jan 16 23:50:17 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:50:18 2026 daemon.err udhcpc[23383]: Sending discover...
Fri Jan 16 23:50:19 2026 daemon.err wandetect3: neigh entry not found
Fri Jan 16 23:50:20 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:50:20 2026 daemon.err awn[1583]: [awn_get_lan_ip:366]: ioctl error
Fri Jan 16 23:50:20 2026 daemon.warn awn[1583]: [awnd_update_lanip:2168]: get lan ip failed
Fri Jan 16 23:50:21 2026 daemon.err udhcpc[23383]: Sending discover...
Fri Jan 16 23:50:21 2026 daemon.err udhcpc[23383]: Sending select for 192.168.178.100...
Fri Jan 16 23:50:22 2026 daemon.err wandetect3: neigh entry not found
Fri Jan 16 23:50:23 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:50:24 2026 daemon.err udhcpc[23383]: Sending select for 192.168.178.100...
Fri Jan 16 23:50:25 2026 daemon.err wandetect3: neigh entry not found
Fri Jan 16 23:50:26 2026 daemon.err conn-indicator: [send_query] Failed to send DNS query: Network is unreachable
Fri Jan 16 23:50:26 2026 daemon.err client_mgmt: mac 70-18-8B-67-28-6E had uploaded
Fri Jan 16 23:50:26 2026 user.notice smartip: [lan] detect sucess to update lanIp and write dns file
Fri Jan 16 23:50:26 2026 user.notice smartip: [lan] Notify the lan ip changed.
Fri Jan 16 23:50:26 2026 user.notice smartip: [lan] config IP: ifconfig br-lan 192.168.178.100 netmask 255.255.255.0
Fri Jan 16 23:50:26 2026 user.notice smartip: [lan] route del default dev br-lan
Fri Jan 16 23:50:26 2026 user.notice smartip: [lan] route add default gw 192.168.178.1
Fri Jan 16 23:50:26 2026 user.notice smartip: [lan] /etc/init.d/guest_eth reload gw 192.168.178.1
Fri Jan 16 23:50:27 2026 user.notice smartip: [lan] restart miniupnpd
Fri Jan 16 23:50:27 2026 user.notice smartip: [lan] Send Message -- TYPE:lan, EVENT:UPDATE
Fri Jan 16 23:50:27 2026 user.emerg syslog: tp217,505[23581]:
Fri Jan 16 23:50:27 2026 user.notice smartip: [lan] restart domain_login
Fri Jan 16 23:50:28 2026 daemon.notice wandetect3: fdb.lladdr = 70-18-8b-67-28-6e
Fri Jan 16 23:50:28 2026 daemon.err wandetect3: switch fdb entry not found
Fri Jan 16 23:50:29 2026 daemon.notice conn-indicator: Invoke led: conn[0]
Fri Jan 16 23:50:29 2026 daemon.notice conn-indicator: Connectivity changed: OFFLINE(0x1) -> ONLINE(0x0)
Fri Jan 16 23:50:31 2026 daemon.notice wandetect3: fdb.lladdr = 70-18-8b-67-28-6e
Fri Jan 16 23:50:31 2026 daemon.notice wandetect3: wan.phy=3, wan.iface=eth0.1
Fri Jan 16 23:50:39 2026 authpriv.notice dropbear[23764]: Pubkey auth succeeded for 'root' with key sha1!! 96:56:da:fd:0a:c8:90:f5:2f:66:e8:12:79:cf:52:71:58:95:eb:e6 from 192.168.178.100:48812
Fri Jan 16 23:50:56 2026 daemon.err udhcpc[23535]: Sending renew...
Fri Jan 16 23:51:41 2026 daemon.err uhttpd[7774]: iptables: No chain/target/match by that name.
Fri Jan 16 23:51:41 2026 daemon.err uhttpd[7774]: iptables v1.4.21: Couldn't load target `domain_login_rule':No such file or directory
Fri Jan 16 23:51:41 2026 daemon.err uhttpd[7774]:
Fri Jan 16 23:51:41 2026 daemon.err uhttpd[7774]: Try `iptables -h' or 'iptables --help' for more information.
Fri Jan 16 23:51:41 2026 daemon.err uhttpd[7774]: iptables: No chain/target/match by that name.
Fri Jan 16 23:51:41 2026 daemon.err uhttpd[7774]: iptables: No chain/target/match by that name.
Fri Jan 16 23:51:41 2026 user.emerg syslog: tp215,22[24717]:
Fri Jan 16 23:51:43 2026 daemon.err uhttpd[7774]: uci: Entry not found
Fri Jan 16 23:51:48 2026 daemon.err uhttpd[7774]: uci: Entry not found
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@Reell
I've tried serveral ways of connecting the Decos already. The instability happens in each configuration.
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@Reell Update to 1.8.2 & see if the problem persists
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