Hi, 

Please help to fix some problem on my router. I bought TL-MR6400 few day ago and suffered the internet disconnect issue every day.

when issue happened, system lights are all lit, but my device can't connect the internet. The only way is to do a hard reset then internet connect will be okayed.

I also posted the system log i saw as below, please let me know how to solve it. Thank 

Firmware Version: 1.3.0 0.9.1 v0001.0 Build 200402 Rel.63263n

Hardware Version: TL-MR6400 v3 00000002

2021-04-01 13:03:24 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:03:27 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:03:30 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:03:35 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:03:38 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:03:41 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:05:52 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:05:55 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:05:58 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:06:03 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:06:06 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:06:09 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:08:20 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:08:23 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:08:26 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:08:31 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:08:34 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:08:37 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:10:48 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:10:51 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:10:54 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:10:59 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:11:02 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:11:05 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:13:16 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:13:19 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:13:22 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:13:27 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:13:30 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:13:33 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:15:44 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:15:47 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:15:50 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:15:55 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:15:58 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:16:01 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:18:12 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:18:15 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:18:18 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:18:23 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:18:26 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:18:29 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:20:40 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:20:43 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:20:46 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:20:51 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:20:54 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:20:57 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:23:08 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:23:11 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:23:14 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:23:19 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:23:22 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:23:25 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:25:36 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:25:39 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:25:42 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:25:47 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:25:50 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:25:53 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:28:04 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:28:07 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:28:10 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:28:15 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:28:18 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:28:21 [5] DHCPC: Recv no OFFER, DHCP Service unavailable
2021-04-01 13:30:32 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:30:35 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:30:38 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2021-04-01 13:30:43 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:30:46 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
2021-04-01 13:30:49 [5] DHCPC: Recv no OFFER, DHCP Service unavailable