Unfortunately same thing occurred after cable swapped. Similar 1 min disconnect and also during late hours. And at roughly 1x per 24hrs.
Feb 6 00:03:17 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link DOWN.
Feb 6 00:03:22 kernel: eth0: sysport_tm port shaper set to 999000 kbps, 35000 mbs (phy speed 1000000 kbps)
Feb 6 00:03:22 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link Up at 1000 mbps full duplex
Feb 6 00:03:36 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link DOWN.
Feb 6 00:03:38 kernel: eth0: sysport_tm port shaper set to 999000 kbps, 35000 mbs (phy speed 1000000 kbps)
Feb 6 00:03:38 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link Up at 1000 mbps full duplex
Feb 6 00:03:43 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link DOWN.
Feb 6 00:03:45 kernel: eth0: sysport_tm port shaper set to 999000 kbps, 35000 mbs (phy speed 1000000 kbps)
Feb 6 00:03:45 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link Up at 1000 mbps full duplex
Feb 6 00:03:54 WAN Connection: WAN(0) link up.
Feb 6 00:03:54 rc_service: wanduck 2179:notify_rc restart_wan_if 0
Feb 6 00:04:02 wlceventd: wlceventd_proc_event(645): eth4: Deauth_ind 10:CE:A9:FB:66:ED, status: 0, reason: Unspecified reason (1), rssi:0
Feb 6 00:04:14 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link DOWN.
Feb 6 00:04:18 kernel: eth0: sysport_tm port shaper set to 999000 kbps, 35000 mbs (phy speed 1000000 kbps)
Feb 6 00:04:18 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link Up at 1000 mbps full duplex
Feb 6 00:04:20 wlceventd: wlceventd_proc_event(685): eth4: Auth 10:CE:A9:FB:66:ED, status: Successful (0), rssi:0
Feb 6 00:04:20 wlceventd: wlceventd_proc_event(722): eth4: Assoc 10:CE:A9:FB:66:ED, status: Successful (0), rssi:-41
Feb 6 00:04:22 wan: finish adding multi routes
Feb 6 00:04:22 ntp: start NTP update
Feb 6 00:04:22 miniupnpd[2804]: shutting down MiniUPnPd
Feb 6 00:04:23 miniupnpd: it is advised to use network interface name instead of 192.168.50.1/255.255.255.0
Feb 6 00:04:23 miniupnpd[8883]: HTTP listening on port 34575
Feb 6 00:04:23 kernel: Archer TCP Pure ACK Enabled
Feb 6 00:04:23 rc_service: udhcpc_wan 8800:notify_rc stop_samba
Feb 6 00:04:23 miniupnpd[8883]: Listening for NAT-PMP/PCP traffic on port 5351
Feb 6 00:04:23 Samba Server: smb daemon is stopped
Feb 6 00:04:24 rc_service: udhcpc_wan 8800:notify_rc start_samba
Feb 6 00:04:25 wan_up: Find a 2.5G port on [eth0]
Feb 6 00:04:25 WAN Connection: WAN was restored.
And again for about a min. Same wee hours of the night/morning and 1x per 24 hours. I've sent this on to MR.
TBF MR's customer support has been good. Don't have to wait long for call to be picked up. They are knowledgeable (relative to others), friendly and they do check back, It is a pity this small issue keeps popping up.
One min disconnect once per day is technically no biggie. But it does kill an online match whether gaming or watching live sports.
Feb 7 01:22:10 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link DOWN.
Feb 7 01:22:14 kernel: eth0: sysport_tm port shaper set to 999000 kbps, 35000 mbs (phy speed 1000000 kbps)
Feb 7 01:22:14 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link Up at 1000 mbps full duplex
Feb 7 01:22:19 WAN Connection: WAN(0) link up.
Feb 7 01:22:19 rc_service: wanduck 2179:notify_rc restart_wan_if 0
Feb 7 01:22:28 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link DOWN.
Feb 7 01:22:31 kernel: eth0: sysport_tm port shaper set to 999000 kbps, 35000 mbs (phy speed 1000000 kbps)
Feb 7 01:22:31 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link Up at 1000 mbps full duplex
Feb 7 01:22:33 acsd: eth4: COEX: downgraded chanspec 0x1908 to 0x100a: channel 3 used by exiting BSSs
Feb 7 01:22:34 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link DOWN.
Feb 7 01:22:37 kernel: eth0: sysport_tm port shaper set to 999000 kbps, 35000 mbs (phy speed 1000000 kbps)
Feb 7 01:22:37 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link Up at 1000 mbps full duplex
Feb 7 01:22:40 WAN Connection: WAN(0) link up.
Feb 7 01:22:40 rc_service: wanduck 2179:notify_rc restart_wan_if 0
Feb 7 01:23:03 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link DOWN.
Feb 7 01:23:08 kernel: eth0: sysport_tm port shaper set to 999000 kbps, 35000 mbs (phy speed 1000000 kbps)
Feb 7 01:23:08 kernel: eth0 (Int switch port: 1) (Logical Port: 1) (phyId: 7) Link Up at 1000 mbps full duplex
Feb 7 01:23:14 wlceventd: wlceventd_proc_event(645): eth4: Deauth_ind 10:CE:A9:FB:66:ED, status: 0, reason: Unspecified reason (1), rssi:0
Feb 7 01:23:14 wan: finish adding multi routes
Feb 7 01:23:14 ntp: start NTP update
Feb 7 01:23:14 miniupnpd[8883]: shutting down MiniUPnPd
Feb 7 01:23:14 miniupnpd: it is advised to use network interface name instead of 192.168.50.1/255.255.255.0
Feb 7 01:23:15 miniupnpd[7995]: HTTP listening on port 44524
Feb 7 01:23:15 rc_service: udhcpc_wan 7923:notify_rc stop_samba
Feb 7 01:23:15 kernel: Archer TCP Pure ACK Enabled
Feb 7 01:23:15 Samba Server: smb daemon is stopped
Feb 7 01:23:15 miniupnpd[7995]: Listening for NAT-PMP/PCP traffic on port 5351
Feb 7 01:23:16 rc_service: udhcpc_wan 7923:notify_rc start_samba
Feb 7 01:23:17 wan_up: Find a 2.5G port on [eth0]
Feb 7 01:23:18 ping_target_with_size: Ping test is complete.
Feb 7 01:23:20 ping_target_with_size: Successful to ping target(100.71.0.1) with size(79)
Feb 7 01:23:20 wan_up: Restart DDNS
Feb 7 01:23:20 dhcp client: bound 100.71.19.136/255.255.224.0 via 100.71.0.1 for 86400 seconds.
Feb 7 01:23:21 WAN Connection: WAN was restored.
Edit: ONT replacement resolved the issue.
https://forums.hardwarezone.com.sg/threads/myrepublic-fibre-part-5.4981088/post-155314698