sudden LAN drop

[dahyippur]

Just now all the lan connections to my rt-ac68u gave up, couldn't even open the web gui. Used my phone to connect with router and everything looks normal. Granted I'm running 384.5 but plan to upgrade this weekend. First time I've experienced this, anyone else?

 

[Dave Parker]

If you are going to jump from 384.5 to 384.9 I would recommend you do a factory default reset and then manually reconfigure. Don't use a saved backup. Yes it's a pain but my guess is that your problem will go away.

 

[EmeraldDeer]

Just now all the lan connections to my rt-ac68u just gave up, couldn't even open the web gui. Used my phone to connect with router and everything looks normal. Granted I'm running 384.5 but plan to upgrade this weekend. First time I've experienced this, anyone else?

This used to happen to me when using Fingbox.
https://www.snbforums.com/threads/r...urity-enhancements.16798/page-205#post-465062

 

[dahyippur]

Ok I have a tiny bit more info to add. I was hoping this issue went away after a fw upgrade and factory default - initialize, but its back. Just now I was using adblink to manage an amazon device and lost connection between isp and router. Every time this happens I'm able to open the webUI wirelessly, but not through lan ports. Immediately after disconnecting any one ethernet cable, the connection is restored?! Syslog is not very descriptive

 

[Christian_Haitian]

Ok I have a tiny bit more info to add. I was hoping this issue went away after a fw upgrade and factory default - initialize, but its back. Just now I was using adblink to manage an amazon device and lost connection between isp and router. Every time this happens I'm able to open the webUI wirelessly, but not through lan ports. Immediately after disconnecting any one ethernet cable, the connection is restored?! Syslog is not very descriptive

I would encounter this issue on my AC68U from time to time. What seems to have helped in my case was to create a 1GB swap file on a USB drive. I tried this as a sort of last resort a few weeks ago and noticed that not only did the sudden network drops go away, my internet web browsing seemed to be smoother and getting to the router’s gui is much faster. As of today, my swap file usage is at about 15MBs so 1GB swap might be excessive but it definitely seemed to help with overall performance and reliability of my unit. I’m running Merlin’s 384.8_2 and have Diversion, Fresh JR QOS script, AMTM, and AiMesh running and doing very well for me.

 

[dahyippur]

I would encounter this issue on my AC68U from time to time. What seems to have helped in my case was to create a 1GB swap file on a USB drive. I tried this as a sort of last resort a few weeks ago and noticed that not only did the sudden network drops go away, my internet web browsing seemed to be smoother and getting to the router’s gui is much faster. As of today, my swap file usage is at about 15MBs so 1GB swap might be excessive but it definitely seemed to help with overall performance and reliability of my unit. I’m running Merlin’s 384.8_2 and have Diversion, Fresh JR QOS script, AMTM, and AiMesh running and doing very well for me.

At the moment I'm using merlin without any scripts and 99% stock configuration. Not sure a swap file is needed in my case but will look into it.

I see now that removing any ethernet cable does not restore wan connection, but removing any wired amazon device does. Frustrating since this happens about 2 times per day. I've disabled upnp for now, but am running out of ideas

 

[L&LD]

At the moment I'm using merlin without any scripts and 99% stock configuration. Not sure a swap file is needed in my case but will look into it.

I see now that removing any ethernet cable does not restore wan connection, but removing a wired amazon device does. Frustrating since this happens about 2 times per day. I've disabled upnp for now, but am running out of ideas

Can you try doing a firmware update of the Amazon device if it has one and then follow either way with a full reset of it?

 

[dahyippur]

There are 3 Fire Pendants wired directly to the router, each of which picked up the new 6.2.6.0 fw last week. It would be quite time consuming to reconfigure each one from scratch, but may have to be done eventually. Been stable for about 7 hours with upnp off, my next guess would be to disable stp and try a new switch ¯\_(ツ)_/¯

I've taken every last device off dhcp while troubleshooting this, so syslog is pretty empty. Just one new line this afternoon probably not worth mentioning:
Mar 15 16:22:38 rc_service: httpd 261:notify_rc start_autodet
Mar 15 16:22:39 kernel: autodet uses obsolete (PF_INET,SOCK_PACKET)

 

[dahyippur]

over 24 hours with no issues now! Early to say for certain, but maybe something on the network abuses upnp given the opportunity