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TL-MR6400 v5.3 disconnects from 4G

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TL-MR6400 v5.3 disconnects from 4G

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TL-MR6400 v5.3 disconnects from 4G
TL-MR6400 v5.3 disconnects from 4G
2024-04-16 19:26:18
Tags: #Network Connectivity #stability
Model: TL-MR6400  
Hardware Version: V5
Firmware Version: ‪1.4.0 0.9.1 v0001.0 Build 220506 Rel.57555n

My router disconnects multiple times (5-10 times) from the 4G connection per day, the ISP only has 4G, 3G or LTE is not available. It is connected to Vodafone's network, my phone is also on Vodafone and I haven't seen issues there. The "Signal Strength" is 75%, I have 2 to 3 bars out of 3 on the device.

The disconnect happens more frequently when I'm on video calls.

The router automatically reconnnects after ~1 minute. While the 4G is disconnected I can still ping the LAN interface.

Current ISP Version: 22042701

 

 

I tried setting the band manually instead of auto, did not help.

 

Any ideas?

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#1
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12 Reply
Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-17 02:00:11

  @Szparki 

 

Multiple factors might cause the disconnect automatically. For the LTE disconnecting issue, please try the following steps for troubleshooting:

    1. If the band was changing to a different one when the internet interrupts, select a 4G LTE band(s) manually on Advanced > Network > Internet page and change the Band from "Auto" to "Manual". If your LTE router doesn't support manual band selection, you could get the beta firmware from this thread: https://community.tp-link.com/en/home/forum/topic/241534

    2. You may try to change the Network Type on Advanced > Network > Internet page from 4G Preferred to 4G Only.

    3. Please insert the same SIM into another LTE device or even a smartphone to check if the SIM has a problem. Or just swap the SIM cards between your router and phone for comparison.

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router EasyMesh Is Available When Wi-Fi Routers Work in AP Mode as A Controller. Archer BE550 New Software Enhances System Stability and Optimizes MLO Network Stability. TL-WA3001 Supports EasyMesh, Speed Limit, Guest Network in AP Mode and/or Multi-SSID Mode. If you found the post or response helpful, please click Helpful. If an answer solves your problem, click "Recommended Solution" so that others can benefit from it.
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#2
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Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-17 05:34:10

  @Sunshine than you for your reply!

1. I tried setting the band manually, no changes, I haven't upgrade the firmware yet. I found a newer firmware on this link: https://www.tp-link.com/hu/support/download/tl-mr6400/v5.3/#Firmware, Build 221121. I can try that next, I'm just slight hesitant since I don't have a backup device. Should I try ISP update first? Does ISP update contain frequency information for the internet providers?

2. Same, done it, no changes

3. I inserted the SIM in my phone, it works fine

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#3
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Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-18 08:25:42 - last edited 2024-04-18 08:26:24

 

On this link (https://www.tp-link.com/en/support/download/tl-mr6400/v5.3/#Firmware) I'm seeing two firmwares, I'm not sure if the top one is for my router or not. The buttom one is the same as the one alreaedy installed.

 

My routers current firmware and hardware is:

 

Firmware Version:‪1.4.0 0.9.1 v0001.0 Build 220506 Rel.57555n Hardware Version:‪TL-MR6400 v5.3 00000002

 

 

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#4
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Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-18 17:48:37

I started to lose my patiance, I just did an ISP upgrade with the fole from the local TP-Link official website.

Current ISP version: 23021501

 

The internet works, fingers crossed it's stable.

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#5
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Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-18 19:40:24

Unfortunately this didn't help sad

I noticed in the the system logs that the router is not disconnecting from the internet. However if I start two pings on my computer, one to an external IP or hostaname (1.1.1.1, google.com) and one the local one. The external one on the internet (WAN) will stop pinging but the TP-Link on the LAN port works well.

 

64 bytes from 1.1.1.1: icmp_seq=1466 ttl=52 time=45.508 ms
64 bytes from 1.1.1.1: icmp_seq=1467 ttl=52 time=29.527 ms
64 bytes from 1.1.1.1: icmp_seq=1468 ttl=52 time=26.557 ms
64 bytes from 1.1.1.1: icmp_seq=1469 ttl=52 time=58.760 ms
Request timeout for icmp_seq 1470
Request timeout for icmp_seq 1471
Request timeout for icmp_seq 1472
Request timeout for icmp_seq 1473
Request timeout for icmp_seq 1474

 

 

64 bytes from 192.168.11.1: icmp_seq=1924 ttl=64 time=1.063 ms
64 bytes from 192.168.11.1: icmp_seq=1925 ttl=64 time=0.710 ms
64 bytes from 192.168.11.1: icmp_seq=1926 ttl=64 time=0.896 ms
^C
--- 192.168.11.1 ping statistics ---
1927 packets transmitted, 1927 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.530/1.041/11.054/0.747 ms
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#6
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Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-19 01:03:57 - last edited 2024-04-19 01:04:14

  @Szparki 

 

Hi, please update to the latest firmware as well which is the top one you mentioned.

If the issue still happens frequently with the latest firmware, please provide the following details, we would like to escalate your case to our support engineers for debugging:

- Working mode of the router, like 3G/4G router mode or wireless router mode

- Where are you based, and who is your SIM card carrier?

- Screenshots of Advanced->Status page and Advanced->Network->Internet page when the internet works fine and also when the internet stops

- System Log file without rebooting the router

- How often does the problem happen, and how does it recover?

- When did you purchase the router, and when did the issue start to happen? 

- Is the same SIM card working fine and stable on other 4G devices?

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router EasyMesh Is Available When Wi-Fi Routers Work in AP Mode as A Controller. Archer BE550 New Software Enhances System Stability and Optimizes MLO Network Stability. TL-WA3001 Supports EasyMesh, Speed Limit, Guest Network in AP Mode and/or Multi-SSID Mode. If you found the post or response helpful, please click Helpful. If an answer solves your problem, click "Recommended Solution" so that others can benefit from it.
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#7
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Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-20 07:13:40

Firmware upgrade completed, let's see how it behaves.

 

Firmware Version:‪1.5.0 0.9.1 v0001.0 Build 221121 Rel.62850n Hardware Version:‪TL-MR6400 v5.3 00000002
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#8
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Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-20 10:55:17

 Unfortunately the issues persists after the firmware upgradesad

Here are the answers @Sunshine

 

- Working mode: 4G

- Where are you based, and who is your SIM card carrier?: Hungary, Vodafone

- Screen shot is attached

- System log (it says Failed to upload but I'm copying the whole content here, MAC addresses were obfuscated:

2018-10-01 02:00:39 [5] 4G: init LTE module, set flowstat [enableDataLimit 1, enablePaymentDay 1, paymentDay 2, limitation 536870912000, warningPercent 80]
2018-10-01 02:00:39 [5] 4G: LTE Module: profile num [4], default profile [3], active profile [1]
2018-10-01 02:00:39 [5] 4G: DM: profile num [4], default profile [3], active profile [1]
2018-10-01 02:00:41 [5] System: Enable IPv4 SPI Firewall
2018-10-01 02:00:42 [5] System: Enable IPv6 SPI Firewall
2018-10-01 02:05:57 [5] 4G: dataSwitch: 1
2018-10-01 02:06:01 [5] 4G: LTE internet connected.
2024-04-20 09:14:12 [5] DHCPD: Recv REQUEST from 28:16:AD:xx:xx:xx
2024-04-20 09:14:13 [5] DHCPD: Send ACK to 192.168.11.11
2024-04-20 09:30:56 [5] DHCPD: Recv REQUEST from FA:03:B8:xx:xx:xx
2024-04-20 09:30:57 [5] DHCPD: Send ACK to 192.168.11.14
2024-04-20 09:34:06 [5] DHCPD: Recv REQUEST from 00:E0:4C:xx:xx:xx
2024-04-20 09:34:07 [5] DHCPD: Send ACK to 192.168.11.16
2024-04-20 09:52:34 [5] System: Disable IPv6 SPI Firewall
2024-04-20 09:55:36 [5] DHCPD: Recv REQUEST from 12:04:65:xx:xx:xx
2024-04-20 09:55:37 [5] DHCPD: Send ACK to 192.168.11.13
2024-04-20 09:56:36 [5] DHCPD: Recv REQUEST from FA:03:B8:xx:xx:xx
2024-04-20 09:56:36 [5] DHCPD: Send ACK to 192.168.11.14
2024-04-20 10:08:18 [5] DHCPD: Recv REQUEST from 00:E0:4C:xx:xx:xx
2024-04-20 10:08:18 [5] DHCPD: Send ACK to 192.168.11.16
2024-04-20 11:27:58 [5] DHCPD: Recv REQUEST from 00:E0:4C:xx:xx:xx
2024-04-20 11:27:58 [5] DHCPD: Send ACK to 192.168.11.16
2024-04-20 12:09:26 [5] DHCPD: Recv REQUEST from F2:8A:A8:xx:xx:xx
2024-04-20 12:09:27 [5] DHCPD: Send ACK to 192.168.11.10
2024-04-20 12:09:49 [5] DHCPD: Recv REQUEST from 12:04:65:xx:xx:xx
2024-04-20 12:09:49 [5] DHCPD: Send ACK to 192.168.11.13
2024-04-20 12:09:54 [5] DHCPD: Recv REQUEST from FA:03:B8:xx:xx:xx
2024-04-20 12:09:54 [5] DHCPD: Send ACK to 192.168.11.14
2024-04-20 12:19:35 [5] DHCPD: Recv REQUEST from 00:E0:4C:xx:xx:xx
2024-04-20 12:19:35 [5] DHCPD: Send ACK to 192.168.11.16
2024-04-20 12:31:57 [5] DHCPD: Recv DISCOVER from F0:18:98:xx:xx:xx
2024-04-20 12:31:57 [5] DHCPD: Send OFFER with ip 192.168.11.12
2024-04-20 12:31:57 [5] DHCPD: Recv REQUEST from F0:18:98:xx:xx:xx
2024-04-20 12:31:58 [5] DHCPD: Send ACK to 192.168.11.12
2024-04-20 12:32:53 [5] DHCPD: Recv DISCOVER from F0:18:98:xx:xx:xx
2024-04-20 12:32:53 [5] DHCPD: Send OFFER with ip 192.168.11.12
2024-04-20 12:32:54 [5] DHCPD: Recv REQUEST from F0:18:98:xx:xx:xx
2024-04-20 12:32:54 [5] DHCPD: Send ACK to 192.168.11.12
2024-04-20 12:33:05 [5] DHCPD: Recv DECLINE from F0:18:98:xx:xx:xx
2024-04-20 12:33:15 [5] DHCPD: Recv DISCOVER from F0:18:98:xx:xx:xx
2024-04-20 12:33:15 [5] DHCPD: Send OFFER with ip 192.168.11.15
2024-04-20 12:33:16 [5] DHCPD: Recv REQUEST from F0:18:98:xx:xx:xx
2024-04-20 12:33:16 [5] DHCPD: Send ACK to 192.168.11.15
2024-04-20 12:36:48 [5] DHCPD: Recv REQUEST from 28:16:AD:xx:xx:xx
2024-04-20 12:36:48 [5] DHCPD: Send ACK to 192.168.11.11
2024-04-20 12:38:55 [5] DHCPD: Recv REQUEST from BC:D0:74:xx:xx:xx
2024-04-20 12:38:55 [5] DHCPD: REQUEST ip f0ba8c0 already reserved by F0:18:98:xx:xx:xx
2024-04-20 12:38:55 [5] DHCPD: Send NAK
2024-04-20 12:38:55 [5] DHCPD: Recv DECLINE from BC:D0:74:xx:xx:xx
2024-04-20 12:38:55 [5] DHCPD: Recv DISCOVER from BC:D0:74:xx:xx:xx
2024-04-20 12:38:55 [5] DHCPD: Send OFFER with ip 192.168.11.17
2024-04-20 12:38:56 [5] DHCPD: Recv REQUEST from BC:D0:74:xx:xx:xx
2024-04-20 12:38:56 [5] DHCPD: Send ACK to 192.168.11.17

- How often does the problem happen, and how does it recover? - at least a dozen times a day, it recovers itself in about a minute 

- When did you purchase the router, and when did the issue start to happen? - July 2023, it started to happen 2 weeks ago

- I tried the SIM in a phone and a battery operated hot spot, I saw no issues there

- Here are two ping results, just to show that I can ping the router while in the same time I can't ping google.com (I tried multiple destinations). I did the same from two other computers.

 

--- google.com ping statistics ---
67 packets transmitted, 47 packets received, 29.9% packet loss
round-trip min/avg/max/stddev = 18.687/86.383/318.660/73.096 ms

 

--- 192.168.11.1 ping statistics ---
97 packets transmitted, 97 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.284/0.544/1.928/0.305 ms

 

 

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#9
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Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-22 03:07:46

  @Szparki 

 

Hi, was the screenshot and system log got after the issue happened? 

the screenshot still shows the internet status connected, if it is indeed when the internet stops working, please try to set DNS Servers manually to 8.8.8.8 and 8.8.4.4 on Advanced > Network > LAN Settings page.

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router EasyMesh Is Available When Wi-Fi Routers Work in AP Mode as A Controller. Archer BE550 New Software Enhances System Stability and Optimizes MLO Network Stability. TL-WA3001 Supports EasyMesh, Speed Limit, Guest Network in AP Mode and/or Multi-SSID Mode. If you found the post or response helpful, please click Helpful. If an answer solves your problem, click "Recommended Solution" so that others can benefit from it.
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#10
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Re:TL-MR6400 v5.3 disconnects from 4G
2024-04-27 10:43:28

I've tried this already.

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#11
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12

Information

Helpful: 0

Views: 1355

Replies: 12

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Network Connectivity
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