Multiple "WAN_Connection: Fail to connect with some issues" and "nf_conntrack: expectation table full"

[ExtremeFiretop]

Over the last 2 nights at around the same time my router has lost WAN connection... I'm running an AX88U with 388.2_2
I checked the logs (attached) and notice all it seems to say is: "WAN_Connection: Fail to connect with some issues" and "nf_conntrack: expectation table full" in connection with the WAN drops.

Anyone have any idea what the cause might be? This is new over the last 2 days I don't remember this being an issue before. :/

I have the ChkWAN.sh installed to reboot the router once it's see's WAN drop, but I was literally just sitting watching a TV stream when the AX88U WAN dropped and I waited until the script rebooted the router and everything was back to normal.
I then spent a few minutes on the forums troubleshooting and it happened again! So now this is 3 times in about 24 hours that I'm aware of at least.

Same thing happened last night at around 12:23 at night instead of 12:52 at night from the logs.

Looking for anyone that can help point me in the right direction.
So far I'm looking at the following threads for the fail to connect error:

WAN_Connection: Fail to connect with some issues. - Troublesooting?

Hi Everyone, Every now and again I lose WAN connection, and I'm trying to understand the root cause. Here are the relevant og entries from one of them: Jul 15 13:40:57 WAN_Connection: Fail to connect with some issues. Jul 15 13:40:57 DualWAN: skip single wan wan_led_control - WANRED off Jul 15...

www.snbforums.com

This conclusion of that thread was the reason I installed the ChkWAN.sh script yesterday.

I don't have any advanced features enabled like QoS, I do have a 2GB Swap File enabled, I don't even have an ISP provided modem, I'm using this with a media converter which takes 1Gbps Gpon and converts it to 1Gbps Ethernet.
This setup has worked for years without issue to bypass the modem. No reset router config changes other than installing ChkWAN.sh (due to the errors which were already happening).

For troubleshooting root cause I'm looking at these so far:

Diversion - Diversion large list from oisd.nl crushes my GT-AX6000

I love the large list from oisd. It works (near) perfectly in eliminating trackers and adverts while allowing applications to work without having to fiddle with whitelists. With the standard medium list, links from slickdeals won’t work without whitelisting them and some Roku apps break...

www.snbforums.com

nf_conntrack: expectation table full and other log oddities

Hello all Wondering if someone can shed some light on what these are and if there is any resolution to these appearing in the log. Its been mentioned on here a couple of times but I can't see a clear answer or resolution as to why this happens. Besides my AC86U (384.9) consistently...

www.snbforums.com

Syslog Flooded With nf_conntrack expectation table full Errors, RT-AC86U

I think I may have posted my thread in the incorrect area yesterday! I just unboxed my brand new replacement RT-AC86U from ASUS after my original died in 3 months. This time I was extra careful during the setup. Followed nuclear reset twice. Then did m&m config. Device came with...

www.snbforums.com

Here are the add-ins and scripts I'm running:

1. Diversion w/ pixelserv
2. uiDivStats
3. scMerlin
4. spdMerlin
5. RTRMON
6. Entware Packages
7. Disk Check Script
8. LED Control
9. Reboot Scheduler
10. ChkWAN.sh

 

[ExtremeFiretop]

Current ideas include:

1) Swap File Changes:

Add the following command to the "/jffs/scripts/services-start" script (you can use the nano or vi text editor to do this).
echo 60 > /proc/sys/vm/swappiness

2) Set a higher value to nf_conntrack_expect_max:

Writing a higher value to the following should dispel the messages
/proc/sys/net/netfilter/nf_conntrack_expect_max (Default: 150, change to: 352)

3) Uninstall Divergent

 

[ColinTaylor]

This appears to be an ISP issue and nothing to do with your router.

 

[ExtremeFiretop]

This appears to be an ISP issue and nothing to do with your router.

I guess that's possible. Just Hard to believe; considering that theres no ISP modem in play and Bell had no reported outages on their website.
Bell also usually send an email out when they do scheduled maintenance. And I didn't see any email from them over the last 2 days.

This is fiber to the home so it doesn't usually just drop for a few minutes and come back lol. It's not cable.
Why it would only be a few minutes at a time? Someone at Bell just unplugging and than instantly replugging stuff in for fun?

Are you saying I should be chasing after Bell for playing with my network in the off hours; without notice or official posting about the outage?

 

[ColinTaylor]

Are you saying I should be chasing after Bell for playing with my network in the off hours; without notice or official posting about the outage?

I don't know what's normal for Bell but it's pretty normal for my ISP to do local maintenance or fix faults overnight without any warning, and without any acknowledgment after the fact. Sometimes if I phone them up they can confirm there is/was a local issue.

 

[ExtremeFiretop]

I don't know what's normal for Bell but it's pretty normal for my ISP to do local maintenance or fix faults overnight without any warning, and without any acknowledgment after the fact. Sometimes if I phone them up they can confirm there is/was a local issue.

I appreciate your time reading everything over and writing back your thoughts.
I will definitely keep an eye on this and if it happens again tonight will call Bell right away.

It's just not the service I've been accustomed too, I am up usually working at night, and so I have got used to getting email notifications when they plan downtime.
Maybe as you said, it wasn't "planned" downtime, but really them quickly fixing something in the night "without expected downtime."