Hello,
I recently purchased the Flint 3. Overall, the device appears to be good; however, I am experiencing an issue.
The WAN interface repeatedly disconnects and reconnects, and I am unable to determine the cause. This behavior is very frustrating, as it makes the product unusable. I would appreciate any assistance in resolving this issue.
Initially, I suspected my ISP. When I switched back to the ISP-provided router, there were no issues and the internet connection worked correctly. However, when I replaced the ISP router with the Flint 3, the problem returned. I also replaced the Ethernet cable connected to my PON, but the port up/down issues persisted.
I upgraded the firmware from the stable version 4.8.3 to the beta version 4.8.4, but the issue remains unchanged.
Sun Jan 11 19:00:06 2026 daemon.notice netifd: VLAN 'eth0.40' link is down
Sun Jan 11 19:00:06 2026 daemon.notice netifd: Interface 'wan' has link connectivity loss
Sun Jan 11 19:00:06 2026 daemon.notice netifd: Network device 'eth0' link is down
Sun Jan 11 19:00:07 2026 daemon.notice netifd: wan (27994): Command failed: ubus call network.interface notify_proto { "action": 1, "command": [ "\/usr\/sbin\/pppd", "nodetach", "ipparam", "wan", "ifname", "pppoe-wan", "lcp-echo-interval", "1", "lcp-echo-failure", "5", "lcp-echo-adaptive", "noipv6", "nodefaultroute", "usepeerdns", "maxfail", "1", "user", "cl993@pppoe.ebox.net", "password", "67UZb1pQAR", "ip-up-script", "\/lib\/netifd\/ppp-up", "ip-down-script", "\/lib\/netifd\/ppp-down", "mtu", "1492", "mru", "1492", "plugin", "pppoe.so", "nic-eth0.40" ], "interface": "wan" } (Permission denied)
Sun Jan 11 19:00:07 2026 daemon.notice netifd: Interface 'wan' is now down
Sun Jan 11 19:00:07 2026 daemon.info gl-repeater[25232]: (repeater.lua:1960) interface wan down
Sun Jan 11 19:00:07 2026 daemon.info gl-repeater[25232]: (repeater.lua:1632) switch in 3 seconds...
Sun Jan 11 19:00:07 2026 user.notice firewall: Reloading firewall due to ifdown of wan ()
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: exiting on receipt of SIGTERM
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: started, version 2.90 cachesize 150
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: DNS service limited to local subnets
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: compile time options: IPv6 GNU-getopt no-DBus UBus no-i18n no-IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset nftset auth cryptohash DNSSEC no-ID loop-detect inotify dumpfile
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: UBus support enabled: connected to system bus
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq-dhcp[1]: DHCP, IP range 192.168.8.100 -- 192.168.8.249, lease time 12h
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq-dhcp[1]: IPv6 router advertisement enabled
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: using nameserver 127.0.0.1#3053
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: using only locally-known addresses for test
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: using only locally-known addresses for onion
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: using only locally-known addresses for localhost
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: using only locally-known addresses for local
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: using only locally-known addresses for invalid
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: using only locally-known addresses for bind
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: using only locally-known addresses for lan
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: read /etc/hosts - 12 names
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: read /tmp/hosts/dhcp.cfg01411c - 6 names
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq[1]: read /tmp/hosts/odhcpd - 4 names
Sun Jan 11 19:00:08 2026 daemon.info dnsmasq-dhcp[1]: read /etc/ethers - 0 addresses
Sun Jan 11 19:00:10 2026 daemon.info gl-repeater[25232]: (repeater.lua:1551) no saved network
Sun Jan 11 19:00:11 2026 daemon.notice netifd: Network device 'eth0' link is up
Sun Jan 11 19:00:11 2026 daemon.notice netifd: VLAN 'eth0.40' link is up
Sun Jan 11 19:00:11 2026 daemon.notice netifd: Interface 'wan' has link connectivity
Sun Jan 11 19:00:11 2026 daemon.notice netifd: Interface 'wan' is setting up now
Sun Jan 11 19:00:11 2026 kern.info kernel: [ 2368.153361] nss-dp 3a504000.dp1 eth0: PHY Link up speed: 2500
Sun Jan 11 19:00:11 2026 daemon.info pppd[30230]: Plugin pppoe.so loaded.
Sun Jan 11 19:00:11 2026 daemon.info pppd[30230]: PPPoE plugin from pppd 2.4.9
Sun Jan 11 19:00:11 2026 daemon.notice pppd[30230]: pppd 2.4.9 started by root, uid 0
Sun Jan 11 19:00:11 2026 daemon.err pppd[30230]: Interface eth0.40 has MTU of 1492 -- should be at least 1500.
Sun Jan 11 19:00:11 2026 daemon.err pppd[30230]: This may cause serious connection problems.
Sun Jan 11 19:00:16 2026 daemon.info pppd[30230]: PPP session is 2021
Sun Jan 11 19:00:16 2026 daemon.warn pppd[30230]: Connected to 6c:be:e9:a6:c5:01 via interface eth0.40
Sun Jan 11 19:00:16 2026 kern.info kernel: [ 2373.414058] pppoe-wan: renamed from ppp0
Sun Jan 11 19:00:16 2026 daemon.info pppd[30230]: Renamed interface ppp0 to pppoe-wan
Sun Jan 11 19:00:16 2026 daemon.info pppd[30230]: Using interface pppoe-wan
Sun Jan 11 19:00:16 2026 daemon.notice pppd[30230]: Connect: pppoe-wan <--> eth0.40
Sun Jan 11 19:00:19 2026 daemon.err gl-cloud[10795]: (gl-cloud:1453) error: wait PINGRESP timeout
Sun Jan 11 19:00:19 2026 daemon.err gl-cloud[10795]: (gl-cloud:1453) error: closed
Sun Jan 11 19:00:19 2026 daemon.err gl-cloud[10795]: (gl-cloud:1505) reconnect mqtt in 5s...
Sun Jan 11 19:00:21 2026 daemon.info pppd[30230]: CHAP authentication succeeded
Sun Jan 11 19:00:21 2026 daemon.notice pppd[30230]: CHAP authentication succeeded
Sun Jan 11 19:00:21 2026 daemon.notice pppd[30230]: peer from calling number 6C:BE:E9:A6:C5:01 authorized
Sun Jan 11 19:00:21 2026 daemon.notice pppd[30230]: local IP address 198.16.206.236
Sun Jan 11 19:00:21 2026 daemon.notice pppd[30230]: remote IP address 198.58.198.33
Sun Jan 11 19:00:21 2026 daemon.notice pppd[30230]: primary DNS address 74.116.184.28
Sun Jan 11 19:00:21 2026 daemon.notice pppd[30230]: secondary DNS address 96.127.255.29
Sun Jan 11 19:00:21 2026 daemon.info avahi-daemon[20740]: Joining mDNS multicast group on interface pppoe-wan.IPv4 with address 198.16.206.236.
Sun Jan 11 19:00:21 2026 daemon.info avahi-daemon[20740]: New relevant interface pppoe-wan.IPv4 for mDNS.
Sun Jan 11 19:00:21 2026 daemon.info avahi-daemon[20740]: Registering new address record for 198.16.206.236 on pppoe-wan.IPv4.
Sun Jan 11 19:00:21 2026 daemon.notice netifd: Network device 'pppoe-wan' link is up
Sun Jan 11 19:00:21 2026 daemon.info gl-cloud[10795]: (gl-cloud:1013) reconnect mqtt now due to network wan up
Sun Jan 11 19:00:21 2026 daemon.notice netifd: Network alias 'pppoe-wan' link is up
Sun Jan 11 19:00:21 2026 daemon.notice netifd: Interface 'wan' is now up
Sun Jan 11 19:00:21 2026 user.notice kmwan: config json str={ "op": 2, "data": { "cells": [ { "interface": "wan", "netdev": "pppoe-wan", "track_mode": "force", "addr_type": 4, "force_ip": "198.16.206.236", "tracks": [ { "type": "ping", "ip": "1.1.1.1" }, { "type": "ping", "ip": "8.8.8.8" }, { "type": "ping", "ip": "208.67.222.222" }, { "type": "ping", "ip": "208.67.220.220" } ] } ] } }
Sun Jan 11 19:00:21 2026 kern.warn kernel: [ 2378.413762] [add_dev_config 319]add node success. iface:wan, dev:pppoe-wan, ifindex:55
Sun Jan 11 19:00:21 2026 daemon.info gl-repeater[25232]: (repeater.lua:1946) interface wan offline
Sun Jan 11 19:00:21 2026 daemon.info gl-repeater[25232]: (repeater.lua:1632) switch in 3 seconds...
Sun Jan 11 19:00:21 2026 user.notice firewall: Reloading firewall due to ifup of wan (pppoe-wan)
Sun Jan 11 19:00:22 2026 daemon.info gl-cloud[10795]: (gl-cloud:1034) fetch ca from: https://gslb-eu.goodcloud.xyz/getCaCert/ca.crt
Sun Jan 11 19:00:22 2026 daemon.info gl-cloud[10795]: (gl-cloud:1099) fetch server from: https://gslb-eu.goodcloud.xyz/v2/device/auth
Sun Jan 11 19:00:23 2026 daemon.info gl-cloud[10795]: (gl-cloud:1198) connect mqtt broker: 18.209.114.161 28883
Sun Jan 11 19:00:24 2026 daemon.info gl-cloud[10795]: (gl-cloud:1388) conack: 0 connection accepted
Sun Jan 11 19:00:24 2026 daemon.info gl-repeater[25232]: (repeater.lua:1551) no saved network
Sun Jan 11 19:00:25 2026 daemon.info gl-repeater[25232]: (repeater.lua:1946) interface wan online
Sun Jan 11 19:00:25 2026 daemon.info gl-repeater[25232]: (repeater.lua:1632) switch in 3 seconds...
Sun Jan 11 19:00:28 2026 daemon.info gl-repeater[25232]: (repeater.lua:1551) no saved network
Sun Jan 11 19:02:15 2026 daemon.info hostapd: wlan1: STA ce:82:9b:b2:80:54 IEEE 802.11: associated (aid 1)
Sun Jan 11 19:02:15 2026 kern.err kernel: [ 2492.721672] wlan: [10340:I:ANY] wlan_cfg80211_change_station: Ignore set station for ap vlan wlan1
Sun Jan 11 19:02:15 2026 daemon.info hostapd: wlan1: STA ce:82:9b:b2:80:54 WPA: sending 1/4 msg of 4-Way Handshake
Sun Jan 11 19:02:15 2026 daemon.info hostapd: wlan1: STA ce:82:9b:b2:80:54 WPA: received EAPOL-Key frame (2/4 Pairwise)
Sun Jan 11 19:02:15 2026 daemon.info hostapd: wlan1: STA ce:82:9b:b2:80:54 WPA: sending 3/4 msg of 4-Way Handshake
Sun Jan 11 19:02:15 2026 daemon.info hostapd: wlan1: STA ce:82:9b:b2:80:54 WPA: received EAPOL-Key frame (4/4 Pairwise)
Sun Jan 11 19:02:15 2026 daemon.info hostapd: wlan1: STA ce:82:9b:b2:80:54 RADIUS: starting accounting session BA562AB40F8CBBDA
Sun Jan 11 19:02:15 2026 daemon.info hostapd: wlan1: STA ce:82:9b:b2:80:54 WPA: pairwise key handshake completed (RSN)
Sun Jan 11 19:02:16 2026 daemon.info dnsmasq-dhcp[1]: DHCPREQUEST(br-lan) 192.168.8.117 ce:82:9b:b2:80:54
Sun Jan 11 19:02:16 2026 daemon.info dnsmasq-dhcp[1]: DHCPACK(br-lan) 192.168.8.117 ce:82:9b:b2:80:54 MacBookPro
Sun Jan 11 19:02:17 2026 daemon.info dnsmasq-dhcp[1]: DHCPREQUEST(br-lan) 192.168.8.117 ce:82:9b:b2:80:54
Sun Jan 11 19:02:17 2026 daemon.info dnsmasq-dhcp[1]: DHCPACK(br-lan) 192.168.8.117 ce:82:9b:b2:80:54 MacBookPro
Sun Jan 11 19:02:18 2026 daemon.info dnsmasq-dhcp[1]: DHCPREQUEST(br-lan) 192.168.8.117 ce:82:9b:b2:80:54
Sun Jan 11 19:02:18 2026 daemon.info dnsmasq-dhcp[1]: DHCPACK(br-lan) 192.168.8.117 ce:82:9b:b2:80:54 MacBookPro
