WAN connection drops on Asus DSL-N16

[aising]

Hello,

This is the second time I write this post because the first time I closed the forum tab by mistake and I lost the text, so I apologize if I miss something. I’m going to try to explain the weird issue I have with my ASUS DSL-N16.

The matter is that when I download a file via Ethernet, for example an .iso from Ubuntu’s website, at the max. speed of my DSL connection (around 2MB/s) the WAN connection drops on the router after some seconds/minutes. It also happens even if I’m watching a TV channel on streaming (less than 1MB/s) and checking other stuff on the background such as social networks. The DSL connection always keeps up, only WAN resets, I just lose the IP and I get a new one. Before the WAN connections finally drops, some packets are lost randomly (for example, to 8.8.8.8, but not to 192.168.1.1). This is happening since I changed my router a few weeks ago. These are some of the messages the router log shows:

LCP terminated by peer
Connection terminated
Modem hangup
LCP down
LCP is allowed to come up
[…]
WAN was restored

Some screenshots:

https://i.snag.gy/tMBgjy.jpg
https://i.snag.gy/ptA0Y7.jpg

Firstly I thought it could be an issue with the DSL or WAN settings on the router because with this new router the speed sync. improved, but I checked all and nothing solved it. In addition, DSL values such as SNR margin and so on are correct and stable as they were with my old router.

Then I discovered that this doesn’t happen if I connect via Wi-Fi on the same PC, even if I reach the same speed values I mentioned before. I also noticed that under Linux none of this occurs, so it seems happening only on Windows. Is it possible that a compatibility issue between Windows, the ethernet network driver and the ASUS router kill the WAN connection? I’ve never imagined it…

I’m using the latest router firmware (1.1.2.3_617), Ethernet driver (Realtek PCIe GbE Family Controller, 10.31.828.2018) and Windows 10 (1809) version. I tried reinstalling the driver and I tested the four LAN ports of the router with no luck. I don’t know what else I can try but this is really annoying… Any idea, please? I’m from Spain.

Thanks.

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[UK Sentinel]

Welcome, you said in you post you changed your router? do you mean firmware? or a configuration? or is the DSL-N16 a new router ?

Maybe for testing, try an earlier firmware, and see if issue is Window/Router ?

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[aising]

Thanks for answering. I changed the router model, this is my first time using an ASUS router. I had a Huawei some weeks ago with no problems. This new DSL-N16 had an older firmware installed when I got it and I had the same issues I commented before, so I decided to update it to the latest version available on the official website to check if it could help but it didn’t.

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[UK Sentinel]

Understood, can you cut and past the previous 10 logs before – “LCP terminated by peer
Connection terminated” as this may help?

Also, change your VDSL profile to 17a – it is currently set to 30a?

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[aising]

Also, change your VDSL profile to 17a – it is currently set to 30a?

My connection is ADSL+, not VDSL. Does it affect anyway? This is the log:

2019-03-16 11:49:40 kernel: BA – Send ADDBA request. StartSeq = 200, FrameLen = 33. BufSize = 24
2019-03-16 11:49:42 kernel: BA – Send ADDBA request. StartSeq = 100, FrameLen = 33. BufSize = 56
2019-03-16 11:49:42 kernel: BA – Send ADDBA request. StartSeq = 300, FrameLen = 33. BufSize = 104
2019-03-16 12:25:48 kernel: BA – Send ADDBA request. StartSeq = 200, FrameLen = 33. BufSize = 40
2019-03-16 12:42:30 kernel: BA – Send ADDBA request. StartSeq = 400, FrameLen = 33. BufSize = 56
2019-03-16 12:42:47 kernel: BA – Send ADDBA request. StartSeq = 200, FrameLen = 33. BufSize = 24
2019-03-16 12:55:25 kernel: AP SETKEYS WPA2 MAC=XX:XX:XX:XX:XX:XX
2019-03-16 12:55:35 kernel: AP SETKEYS WPA2 MAC=XX:XX:XX:XX:XX:XX
2019-03-16 12:57:39 kernel: BA – Send ADDBA request. StartSeq = 500, FrameLen = 33. BufSize = 8
2019-03-16 13:08:35 kernel: BA – Send ADDBA request. StartSeq = 200, FrameLen = 33. BufSize = 72
2019-03-16 17:54:30 syslog: LCP terminated by peer
2019-03-16 17:54:30 syslog: Connect time 3043.0 minutes.
2019-03-16 17:54:30 syslog: Sent 258940126 bytes, received 847665223 bytes.
2019-03-16 17:54:30 kernel: BA – Send ADDBA request. StartSeq = 100, FrameLen = 33. BufSize = 104
2019-03-16 17:54:31 kernel: Link State: PVC_0 logistic interface down.
2019-03-16 17:54:33 syslog: Connection terminated.
2019-03-16 17:54:33 syslog: Modem hangup
2019-03-16 17:54:33 syslog: LCP down.
2019-03-16 17:54:34 WAN Connection: Fail to connect with some issues.
2019-03-16 17:54:37 syslog: LCP is allowed to come up.
2019-03-16 17:54:37 syslog: PPP session is 60358
2019-03-16 17:54:37 syslog: Connected to XX:XX:XX:XX:XX:XX via interface nas0
2019-03-16 17:54:37 syslog: Using interface ppp0
2019-03-16 17:54:37 syslog: Connect: ppp0 <–> nas0
2019-03-16 17:54:40 syslog: CHAP authentication succeeded: Authentication success,Welcome!
2019-03-16 17:54:40 syslog: CHAP authentication success
2019-03-16 17:54:40 syslog: CHAP authentication succeeded
2019-03-16 17:54:40 syslog: peer from calling number XX:XX:XX:XX:XX:XX authorized
2019-03-16 17:54:41 syslog: local IP address XXX.XXX.XXX.XXX
2019-03-16 17:54:41 syslog: remote IP address XXX.XXX.XXX.XXX
2019-03-16 17:54:41 syslog: primary DNS address XXX.XXX.XXX.XXX
2019-03-16 17:54:41 syslog: secondary DNS address XXX.XXX.XXX.XXX
2019-03-16 17:54:41 dnsmasq[2462]: exiting on receipt of SIGTERM
2019-03-16 17:54:41 dnsmasq[16538]: started, version 2.78 cachesize 150
2019-03-16 17:54:41 dnsmasq[16538]: using nameserver XXX.XXX.XXX.XXX#53
2019-03-16 17:54:41 dnsmasq[16538]: using nameserver XXX.XXX.XXX.XXX#53
2019-03-16 17:54:41 dnsmasq[16538]: reading /etc/resolv.conf
2019-03-16 17:54:41 dnsmasq[16538]: using nameserver XXX.XXX.XXX.XXX#53
2019-03-16 17:54:41 dnsmasq[16538]: using nameserver XXX.XXX.XXX.XXX#53
2019-03-16 17:54:41 dnsmasq[16538]: ignoring nameserver 127.0.0.1 – local interface
2019-03-16 17:54:41 dnsmasq[16538]: bad address at /etc/hosts line 2
2019-03-16 17:54:41 dnsmasq[16538]: read /etc/hosts – 5 addresses
2019-03-16 17:54:41 kernel: [qos_execute(8883)]:Force Turn Off Bandwidth Limiter on Guest Network.
2019-03-16 17:54:41 kernel: Link State: PVC_0 logistic interface up.
2019-03-16 17:54:43 kernel:
2019-03-16 17:54:43 kernel: #### wan_primary: [XXX.XXX.XXX.XXX]
2019-03-16 17:54:43 kernel: ddns_execute(), DDNS is not enable, so remove /etc/ddns.conf.
2019-03-16 17:54:44 WAN Connection: WAN was restored.

Sometimes I see “ICV Error” but not before or after this happens. I don’t see anything else “weird” on the log.

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[UK Sentinel]

it could help,  the DSL-N16 is an old model and I seem to remember back in the day, on some ISP, the default 30a profile caused issues in certain countries exchanges/DSLAM, give it a try?

Edit: also try this option:

Go to wan> internet connection> edit
You will find a regulation that says
additional pppd options
Get the command
lcp-echo-interval 0
If 0 does not connect to your dslam  try instead 0, 30, 40, 60 but first 0
I believe that even if this method does not help, it may help reduce your problem

Is QoS enabled? if so, disable and see ?

If the above does not stop problem, then we can assume issue is not DSL/synch related, which is harder to sort out.

Let us know if this helps?

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[aising]

it could help, the DSL-N16 is an old model and I seem to remember back in the day, on some ISP, the default 30a profile caused issues in certain countries exchanges/DSLAM, give it a try?

I tried it but it didn’t help.

Is QoS enabled? if so, disable and see ?

It is disabled.

Go to wan> internet connection> edit
You will find a regulation that says
additional pppd options
Get the command
lcp-echo-interval 0
If 0 does not connect to your dslam try instead 0, 30, 40, 60 but first 0
I believe that even if this method does not help, it may help reduce your problem

I did it and it connected to the DSLAM quickly. I had the feeling that the WAN connection kept up for some seconds more, but nothing else. The result was the same, WAN connection dropped and before that happened I was losing packets all the time. Here’s a screenshot:

https://i.snag.gy/iR0QKA.jpg

The weirdest part is that this is happening only under Windows for any reason, I don’t get it…

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[UK Sentinel]

I assume network cable are same as before?

Send a feedback form to ASUS ( via Router)and mention at the beginning (spoke with UK Sentinel) and I will drop them an email and ask them if they can advise, let me know when you have sent feedback form?

Yes, problem is most strange ;-)

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[aising]

Yes, network cable is the same one. When I tried to sent the feedback form I got “The system failed to connect to the mail server(possibly caused by your ISP blocked SMTP port 25)”. I sent an e-mail with the content to the address xdsl_feedback@asus.com as the message said. I hope it’s okay that way. Thank you for your time on this case.

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[UK Sentinel]

aising wrote:

Yes, network cable is the same one. When I tried to sent the feedback form I got “The system failed to connect to the mail server(possibly caused by your ISP blocked SMTP port 25)”. I sent an e-mail with the content to the address xdsl_feedback@asus.com as the message said. I hope it’s okay that way. Thank you for your time on this case.

Interesting, who is your ISP ?

Only a thought, is router new or from Ebay and maybe worth setting the windows device (at PC)with a Static (fixed) IP address, to see if this helps?

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[aising]

Interesting, who is your ISP?

My ISP is Pepephone, it’s part of MasMovil group.

Only a thought, is router new or from Ebay and maybe worth setting the windows device (at PC)with a Static (fixed) IP address, to see if this helps?

It is a new router. I tested setting a static IP inside the DHCP range, outside and with DHCP reservation on the router too. The WAN connection has just dropped some minutes ago while I was watching a TV channel on streaming with the same messages on the log I pasted…

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[UK Sentinel]

Do you have  second windows PC/Laptop to test via ethernet?

Also, if possible, try a different cable between router and PC, ?

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[aising]

No, I’m sorry, I haven’t a second PC or laptop at the moment. I’ll try to get a laptop from a friend in the next hours to test it. I’ve already tried with two different Ethernet cables and there’s no difference.

 

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[UK Sentinel]

aising wrote:

No, I’m sorry, I haven’t a second PC or laptop at the moment. I’ll try to get a laptop from a friend in the next hours to test it. I’ve already tried with two different Ethernet cables and there’s no difference.

Is router supplied by ISP, I have run out of options to try as problem is very strange,  I am thinking issue is router or LAN card on PC, any chance of returning router or getting replacement?

Maybe as last resort, try a factory reset and build again from scratch, not use backup.cfg

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[aising]

I’ve just tested with a laptop connected via Ethernet. It worked well, WAN connection didn’t drop with the laptop. The laptop has Windows 10 (1803), my PC has Windows 10 (1809). I compared the drivers and they were different: laptop had 10.1.505.2015, PC had 10.31.828.2018. I unistalled the driver and I installed the same driver that the laptop has: WAN connection didn’t drop. So to confirm if it was the driver I unistalled it and I installed the latest one again, 10.31.828.2018: WAN connection isn’t dropping now and the behaviour is like on the laptop.

This is so weird. I don’t know if it’s the driver, Windows 10 (1809), the router, all… And I don’t know how Windows or a driver can make the WAN connection drop… I don’t think that’s normal anyway. I’m gonna wait a week or so to make sure all keep stable now because I don’t know what else to try.

I’ll let you know. Thanks again.

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