USG40 WLAN port Offline

ivargas

Good morning, I have a USG40 unit and for two days I have had a problem with it, sporadically the WLAN interface goes offline, the only solution I have found is to reset it. Reviewing the log I find these reports but I don't know what I should do, can someone help me with the solution? Thank you. I copy part of the log

113	2022-10-31 11:12:17	info	Built-in Service	Enable daylight saving.			Built-in Service
114	2022-10-31 11:12:15	info	CAPWAP	WLAN Controller mode changed. Registration Type:Manual
115	2022-10-31 11:12:15	notice	WLAN Rogue AP Detection	rogue ap detection is enabled.			RAPD
116	2022-10-31 11:12:06	error	myZyXEL.com	Connection error has occurred.
117	2022-10-31 11:11:55	info	Interface	Interface opt_ppp has been changed.			CONFIG CHANGE
118	2022-10-31 11:11:55	info	Interface	Interface wan1_ppp has been changed.			CONFIG CHANGE
119	2022-10-31 11:11:54	info	Interface	Interface dmz has been changed.			CONFIG CHANGE
120	2022-10-31 11:11:54	info	Interface	Interface lan2 has been changed.			CONFIG CHANGE
121	2022-10-31 11:11:53	info	Interface	Interface lan1 has been changed.			CONFIG CHANGE
122	2022-10-31 11:11:51	info	Interface	Interface wan1 has been changed.			CONFIG CHANGE
123	2022-10-31 11:11:51	alert	Policy Route	Trunk SYSTEM_DEFAULT_WAN_TRUNK dead, related policy route rules will be disabled.			TRUNK DEAD
124	2022-10-31 11:11:51	info	Policy Route	Interface opt_ppp alive, related policy route rules will be re-enabled.			INTERFACE ALIVE
125	2022-10-31 11:11:51	info	Policy Route	Trunk SYSTEM_DEFAULT_WAN_TRUNK alive, related policy route rules will be re-enabled.			TRUNK ALIVE
126	2022-10-31 11:11:51	info	Policy Route	Interface wan1_ppp alive, related policy route rules will be re-enabled.			INTERFACE ALIVE
127	2022-10-31 11:11:51	alert	File Manager	WARNING: #configure terminal account pppoe OPT_PPPoE_ACCOUNT exit, Please type user.
128	2022-10-31 11:11:51	alert	File Manager	WARNING: #configure terminal account pppoe WAN1_PPPoE_ACCOUNT exit, Please type user.
129	2022-10-31 11:11:51	info	Policy Route	Interface dmz alive, related policy route rules will be re-enabled.			INTERFACE ALIVE
130	2022-10-31 11:11:51	info	Policy Route	Interface dmz alive, related policy route rules will be re-enabled.			INTERFACE ALIVE
131	2022-10-31 11:11:51	info	Policy Route	Interface lan2 alive, related policy route rules will be re-enabled.			INTERFACE ALIVE

mMontana

I had similar issue with a USG60 few years ago.

• Shutdown (via GUI) the device.
• Wait for the communication of ended shutdown.
• Unplug power adapter from the power socket/wall/whatever, keep it unplugged for 4 minutes at least.
• Plug it back.

Start monitoring again.

Zyxel_Cooldia

Hi @ivargas,

Welcome to Zyxel community. 
Please help us to type CLI Router# show capwap ap all statistics when the issue happens again.
We would like to check if it have TX power in wireless.