Help me troubleshoot network disconnections and low speeds

[Saqr42]

Dears,

I have a network of 17 devices on Asus RT-AC88U connected to my telco fibermodem in bridge mode. Now I have some disconnects and durations of low speeds and lags on two smart TVs and gaming consoles. Here is some of the System Log > General log :

May  5 21:43:26 syslog: WLCEVENTD wlceventd_proc_event(481): eth2: Disassoc 88:71:B1:7D:2F:23, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8)
May  5 21:43:26 syslog: WLCEVENTD wlceventd_proc_event(500): eth2: Auth 88:71:B1:7D:2F:23, status: Successful (0)
May  5 21:43:26 syslog: WLCEVENTD wlceventd_proc_event(529): eth2: Assoc 88:71:B1:7D:2F:23, status: Successful (0)
May  5 21:43:30 kernel: portsLinkStaus=0
May  5 21:43:34 kernel: portsLinkStaus=0
May  5 21:43:37 syslog: WLCEVENTD wlceventd_proc_event(481): eth2: Disassoc 88:71:B1:7D:2F:23, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8)
May  5 21:43:37 syslog: WLCEVENTD wlceventd_proc_event(500): eth2: Auth 88:71:B1:7D:2F:23, status: Successful (0)
May  5 21:43:37 syslog: WLCEVENTD wlceventd_proc_event(529): eth2: Assoc 88:71:B1:7D:2F:23, status: Successful (0)
May  5 21:43:38 kernel: portsLinkStaus=0
May  5 21:43:42 kernel: portsLinkStaus=0
May  5 21:43:46 kernel: portsLinkStaus=0
May  5 21:43:50 kernel: portsLinkStaus=0
May  5 21:43:54 kernel: portsLinkStaus=0

Modem Operation Mode: Wireless router Firmware Version:3.0.0.4.385_20631

How can I diagnose and fix the issue myself ? Is the issue from my network or from provider STC ??

 

[Saqr42]

Telco just reset the "cabin" from their side and connection is functional (telco ONT modem 4 lights on).

This is a fresh log from System log > General Log :

May  7 17:48:55 syslog: wlceventd_proc_event(490): eth1: Deauth_ind 98:2C:BC:0B:F7:4D, status: 0, reason: Unspecified reason (1), rssi:0
May  7 17:48:55 syslog: wlceventd_proc_event(507): eth1: Disassoc 98:2C:BC:0B:F7:4D, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8), rssi:0
May  7 17:48:59 syslog: wlceventd_proc_event(526): eth1: Auth 98:2C:BC:0B:F7:4D, status: Successful (0), rssi:0
May  7 17:48:59 syslog: wlceventd_proc_event(555): eth1: Assoc 98:2C:BC:0B:F7:4D, status: Successful (0), rssi:0
May  7 17:49:06 syslog: wlceventd_proc_event(526): eth1: Auth EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:49:06 syslog: wlceventd_proc_event(555): eth1: Assoc EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:49:14 syslog: wlceventd_proc_event(490): eth1: Deauth_ind EE:50:47:42:CD:9A, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3), rssi:0
May  7 17:49:37 syslog: wlceventd_proc_event(526): eth1: Auth EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:49:37 syslog: wlceventd_proc_event(555): eth1: Assoc EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:49:45 syslog: wlceventd_proc_event(490): eth1: Deauth_ind EE:50:47:42:CD:9A, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3), rssi:0
May  7 17:50:21 syslog: wlceventd_proc_event(526): eth1: Auth EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:50:21 syslog: wlceventd_proc_event(555): eth1: Assoc EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:50:30 syslog: wlceventd_proc_event(490): eth1: Deauth_ind EE:50:47:42:CD:9A, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3), rssi:0
May  7 17:50:32 rc_service: cfg_server 11170:notify_rc restart_obd_monitor
May  7 17:51:09 syslog: wlceventd_proc_event(526): eth1: Auth EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:51:09 syslog: wlceventd_proc_event(555): eth1: Assoc EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:51:17 syslog: wlceventd_proc_event(490): eth1: Deauth_ind EE:50:47:42:CD:9A, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3), rssi:0
May  7 17:51:22 syslog: wlceventd_proc_event(526): eth1: Auth EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:51:22 syslog: wlceventd_proc_event(555): eth1: Assoc EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:51:30 syslog: wlceventd_proc_event(490): eth1: Deauth_ind EE:50:47:42:CD:9A, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3), rssi:0
May  7 17:51:48 syslog: wlceventd_proc_event(526): eth1: Auth EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:51:48 syslog: wlceventd_proc_event(555): eth1: Assoc EE:50:47:42:CD:9A, status: Successful (0), rssi:0
May  7 17:54:36 rc_service: cfg_server 12559:notify_rc restart_obd_monitor
May  7 17:56:42 rc_service: cfg_server 13609:notify_rc restart_obd_monitor
May  7 17:58:13 syslog: wlceventd_proc_event(526): eth1: Auth 9C:E3:3F:D2:79:87, status: Successful (0), rssi:0
May  7 17:58:13 syslog: wlceventd_proc_event(555): eth1: Assoc 9C:E3:3F:D2:79:87, status: Successful (0), rssi:0
May  7 17:58:46 rc_service: cfg_server 14658:notify_rc restart_obd_monitor