378.55 and heavy load crashes the router

[glepa]

Hi, i have a RT-AC68U that i installed 378.55 on. I have a 100/100 Connection to my ISP and when i have transfers like 7-8 mb/s the router crashes and all ports are Down. I have to do a Power on/off.

Anyone have a idea what this is?

 

[Calisro]

is it overclocked? or bad power supply.

 

[joegreat]

Hi, i have a RT-AC68U that i installed 378.55 on. I have a 100/100 Connection to my ISP and when i have transfers like 7-8 mb/s the router crashes and all ports are Down. I have to do a Power on/off.

Hi,

If hardware is OK you should check the configuration. Let's start with this:

Can you check if HW acceleration = Enabled (CTF only) - you find it in the Tools Menu under Network...

If it's not enabled search the forum on why it's OFF (usage of incompatible features) or simple enable it under LAN Menu / Switch Control NAT Acceleration = Auto.

With kind regards
Joe

 

[System Error Message]

200Mb/s is something the router can do with software NAT. router crashing indicates something wrong such as bad ram, bad PSU, bad memory management, corrupted firmware, overheating, etc.

 

[diegoscl]

I have the same problem here with a RT-AC56U...

I checked the settings is indicated by @joegreat and seems fine. Any other ideas?

¡Regards!

 

[System Error Message]

flash firmware and do factory reset? If that doesnt work try a different PSU that has the same volts but higher amp rating.

 

[thelonelycoder]

Same here, RT-AC66U, settings as @joegreat suggests. This has been a problem ever since I had the router. Many firmware updates and factory resets later and it still happens. It does not really bother me though.
I'ts only when I torrent files with speeds above 8-10 mb/s, as @glepa says. A power cycle later and it will not happen again for weeks.

Edit:Router runs at about 60° all the time.

 

[joegreat]

I'ts only when I torrent files with speeds above 8-10 mb/s, as @glepa says. A power cycle later and it will not happen again for weeks.

Hi,

I had also some issues with torrent-ing with Transmission on the router where the Internet Service Provider (ISP) cut the connection when I had to many sessions opened by torrents.

After I limited the no. of sessions to max. total of 100 and 5 connections per torrent, things are working for weeks. With a total of 200 connections and 10 per torrent the router is down with in a day.

Not sure if this helps in your case, but give it a try and limit the no of connections in your torrent client...

With kind regards
Joe

 

[Calisro]

@joegreat I'm curious how many connections you guys have on the router.

Can you grab these with your current setup and maybe when it "goes down with the higher torrent limits?

cat /proc/net/ip_conntrack | wc -l
cat /proc/net/ip_conntrack | grep ESTAB | wc -l

 

[joegreat]

Can you grab these with your current setup and maybe when it "goes down with the higher torrent limits?

Hi,

Here the results of the connection queries:

chief@RT-AC68U:/tmp/home/root# cat /proc/net/ip_conntrack | wc -l
992
admin@RT-AC68U:/tmp/home/root# cat /proc/net/ip_conntrack | grep ESTAB | wc -l
148

The Transmission configuration is set to this limits:

"peer-limit-global": 100,
"peer-limit-per-torrent": 5,

Hope this helps!

With kind regards
Joe

PS.: I can only re-configure the router to 200/10 limits by tomorrow as it will crash after a while and it's currently in use.

 

[Calisro]

nah. no need. those are really low numbers. I'm barking up the wrong tree.

 

[thelonelycoder]

We may finally get to the bottom of this. Thanks @joegreat, will try sometime tomorrow if I'm not too busy.

 

[thelonelycoder]

Shucks, it just happened again. I have set this in qBittorrent:

Global max connetions: 150
Max number of connections per torrent: 20
Global max upload slots: 25​

With these readouts:

cat /proc/net/ip_conntrack | wc -l
716
cat /proc/net/ip_conntrack | grep ESTAB | wc -l
28
​

The good thing is, it came up within a minute by itself, might have been my ISP giving me a hint...
The router was happyly chugging along all the time, I have constantly a

tail -f /tmp/mnt/sda1/logs/dnsmasq.log

running in a terminal. I run Windows 10 and have blocked a lot of the spy domains they use.

I am going to lower the torrent limits as suggested and wait.

 

[glepa]

Hi, sorry for late reply.. busy at work.
I have the setting CTF to AUTO, the unit is not overclocked. Brand New PSU and unit so should be fine. Not had this kind of problems With the orginal firmware.
Connections: 221 - 26 active, 2.4 GHz: 50°C - 5 GHz: 54°C - CPU: 80°C

 

[Calisro]

For anyone seeing dropouts on wireless only, have you by chance enabled "Roaming assistant"? Which would be technically doing exactly what it is designed to do....

 

[polish_pat]

For anyone seeing dropouts on wireless only, have you by chance enabled "Roaming assistant"? Which would be technically doing exactly what it is designed to do....

Roaming assistant is to smooth the transition between your device and an AP (wifi extender). It's to prevent your device to stick with main router when you have APs available with stronger connections.

As for the main problem, i've been having very similar issues for about a week. My connection will drop under load and reconnect shortly after, then disconnect again, unless I stop or reduce downloads. I've never had any issues with this router, it took everything I threw at it.

Not sure if it has anything to do, but my problems started around the same time I used Download Master for the first time to download a very large torrent (750GB) directly to my NAS. The download has already finished a few days ago but when I start to max out my connection, it just goes either limited or I lose signal. I'm very close to the router and have 100% signal. I have 378.55 Merlin, no major settings changes, just a DNS. I don't have QoS. My laptop seems to the the only one having a problem, unless other devices don't refresh the signal icon fast enough because I have a Windows 8 tablet which I had right next to me and It didnt seem to lose the signal when I downloaded but whats funny is it lost the signal when I started downloading updates on the tablet. My laptop is a Dell XPS 12 with an Intel 7260 AC

Please keep this thread alive

 

[Calisro]

Roaming assistant is to smooth the transition between your device and an AP (wifi extender). It's to prevent your device to stick with main router when you have APs available with stronger connections.

I know what roaming assistant does. It does not 'smooth' a re-connection. It tells your client when the connection is a certain power to disassociate and then the client attempts to re-associate which is suppose to provide better roaming rather than sticking to a further AP. Your device then would choose the AP with the same SSID as a re-associated AP. If there is no 'alternate' AP then your device would just reconnect to the same AP.

That being said and the reason I mentioned it is some less technical people are lumping wireless disconnection issues or 'crashing' with "the wireless is dropping out" and I have found at least a few of them turned on roaming assistant at some point and didn't realize what was happening.

As for the main problem

This is my point. These threads seem to pull in people with differing 'problems'. The OP started this thread talking about "heavy load crashes the router" but what you are descibing is NOT crashing the router and only disconnecting a single client when it is doing something. If other clients remain connected and your router is UP then it didn't crash. Your problem could be anything from wireless interference to a client side issue. I'm not saying it is but it certainly didn't crash the router hence why I mentioned 'roaming assistant' disconnecting people based on signal.

 

[programatix]

I'm having this issue too after upgrading to 378.55. Before this, the router never crashed.

 

[glepa]

still the same problem.. using download manager on my NAS. but have been using that for 2 years now. Worked fine With orginal firmware but With .55 the problem is there still...

 

[hggomes]

Running 378.55 on several RT-AC68Us from the beginning and not a single issue or crash so far.

Make sure you follow the instructions after updating, probably NVRAM corruption, HW RESET the router to defaults and configure it manually from scratch.