Merlin 3004.388.4 Wan down every night at 3:01am

[akb]

Hello,

Since I installed the latest Merlin, I have been having my WAN go down aright after 3am daily for the last week or so. I have no clue what could be causing this. Is there anything I can do to troubleshoot this? I checked for any event logs on my modem and it never shows anything.

Sep  5 03:01:26 RT-AX86U-A9C8 kernel: eth0 (Int switch port: 3) (Logical Port: 3) (phyId: 3) Link DOWN.
Sep  5 03:01:33 RT-AX86U-A9C8 WAN(0)_Connection: WAN(0) link down.

Sep  6 03:08:24 RT-AX86U-A9C8 kernel: eth0 (Int switch port: 3) (Logical Port: 3) (phyId: 3) Link DOWN.
Sep  6 03:08:51 RT-AX86U-A9C8 WAN(0)_Connection: WAN(0) link down.

 

[drinkingbird]

Hello,

Since I installed the latest Merlin, I have been having my WAN go down aright after 3am daily for the last week or so. I have no clue what could be causing this. Is there anything I can do to troubleshoot this? I checked for any event logs on my modem and it never shows anything.

Sep  5 03:01:26 RT-AX86U-A9C8 kernel: eth0 (Int switch port: 3) (Logical Port: 3) (phyId: 3) Link DOWN.
Sep  5 03:01:33 RT-AX86U-A9C8 WAN(0)_Connection: WAN(0) link down.

Sep  6 03:08:24 RT-AX86U-A9C8 kernel: eth0 (Int switch port: 3) (Logical Port: 3) (phyId: 3) Link DOWN.
Sep  6 03:08:51 RT-AX86U-A9C8 WAN(0)_Connection: WAN(0) link down.

ISP upgrading hardware or software in your area probably.

 

[akb]

ISP upgrading hardware or software in your area probably.

oh yeah? thanks i guess that might be the culprit as nothing else makes sense

 

[Makaveli]

I agree that has to be coming from the ISP end.

 

[monzttr]

I too thought this was a ISP change but I'm seeing the same issue every morning ~04:00 (PDT) since I've upgraded. I did receive a new modem from Xfinity so I'll be trying it out tonight but I'm definitely suspicious of 3004.388.4.

the morning after upgrading...

Aug 25 03:16:12 WAN_Connection: WAN(0) link down.
Aug 25 03:18:09 WAN_Connection: WAN(0) link up.

Aug 25 03:19:00 WAN_Connection: WAN(0) link down.
Aug 25 03:19:03 WAN_Connection: WAN(0) link up.

Aug 25 03:19:11 WAN_Connection: WAN(0) link down.
Aug 25 03:19:17 WAN_Connection: WAN(0) link up.

Aug 25 03:20:37 WAN_Connection: WAN(0) link down.
Aug 25 03:20:43 WAN_Connection: WAN(0) link up.

Aug 25 03:20:45 wan: finish adding multi routes

Aug 25 03:20:49 WAN_Connection: WAN was restored.



fast forward to today...



Sep  8 04:09:34 WAN_Connection: WAN(0) link down.
Sep  8 04:11:31 WAN_Connection: WAN(0) link up.

Sep  8 04:12:25 WAN_Connection: WAN(0) link down.
Sep  8 04:12:28 WAN_Connection: WAN(0) link up.

Sep  8 04:12:36 WAN_Connection: WAN(0) link down.
Sep  8 04:12:42 WAN_Connection: WAN(0) link up.

Sep  8 04:13:56 WAN_Connection: WAN(0) link down.
Sep  8 04:14:02 WAN_Connection: WAN(0) link up.

Sep  8 04:14:08 WAN_Connection: WAN was restored.

Sep  8 04:14:29 wan_up: Find a 2.5G port on [eth0]

Sep  8 04:26:39 WAN_Connection: WAN(0) link down.
Sep  8 04:28:33 WAN_Connection: WAN(0) link up.

Sep  8 04:29:24 WAN_Connection: WAN(0) link down.
Sep  8 04:29:27 WAN_Connection: WAN(0) link up.

Sep  8 04:29:38 WAN_Connection: WAN(0) link down.
Sep  8 04:29:44 WAN_Connection: WAN(0) link up.

Sep  8 04:30:58 WAN_Connection: WAN(0) link down.
Sep  8 04:31:01 WAN_Connection: WAN(0) link up.

Sep  8 04:31:07 WAN_Connection: WAN was restored.
Sep  8 04:31:27 wan_up: Find a 2.5G port on [eth0]

Sep  8 04:39:37 WAN_Connection: WAN(0) link down.
Sep  8 04:41:31 WAN_Connection: WAN(0) link up.

Sep  8 04:42:23 WAN_Connection: WAN(0) link down.
Sep  8 04:42:26 WAN_Connection: WAN(0) link up.

Sep  8 04:42:35 WAN_Connection: WAN(0) link down.
Sep  8 04:42:41 WAN_Connection: WAN(0) link up.

Sep  8 04:42:55 wan_up: Find a 2.5G port on [eth0]

Sep  8 04:43:56 WAN_Connection: WAN(0) link down.
Sep  8 04:44:02 WAN_Connection: WAN(0) link up.

Sep  8 04:45:25 wan: finish adding multi routes
Sep  8 04:45:28 WAN_Connection: WAN was restored.

Sep  8 04:45:47 wan_up: Find a 2.5G port on [eth0]

Sep  8 04:55:40 WAN_Connection: WAN(0) link down.
Sep  8 04:57:34 WAN_Connection: WAN(0) link up.

Sep  8 04:58:23 WAN_Connection: WAN(0) link down.
Sep  8 04:58:26 WAN_Connection: WAN(0) link up.

Sep  8 04:58:35 WAN_Connection: WAN(0) link down.
Sep  8 04:58:41 WAN_Connection: WAN(0) link up.

Sep  8 04:58:54 wan_up: Find a 2.5G port on [eth0]

Sep  8 04:59:59 WAN_Connection: WAN(0) link down.
Sep  8 05:00:02 WAN_Connection: WAN(0) link up.

Sep  8 05:00:08 WAN_Connection: WAN was restored.

 

[monzttr]

On Friday, I swapped Xfinity modems then I ran into the same issue once Friday night then again ~4am Saturday morning.

Saturday night, I configured the router to use the 1G WAN port instead of the 2.5G port, I have not seen the issue since, granted it's only been one night, this is the first night since upgrading to .388.4 that I did not run into the WAN_Connection: WAN(0) link down issue.

@akb, I'm curious, is your router configured to use the 2.5G WAN port?

I should've mentioned that I'm using a GT-AX11000.

 

[monzttr]

Welp, it happened again this morning after two mornings of no issues. I think I'm going to revert to 388.2 and see if I run into the same issue.

Sep 12 03:04:28 WAN_Connection: WAN(0) link down.
Sep 12 03:04:28 WAN_Connection: WAN was restored.
Sep 12 06:17:06 WAN_Connection: WAN(0) link down.
Sep 12 06:17:50 WAN_Connection: WAN(0) link down.
Sep 12 06:17:54 WAN_Connection: WAN(0) link up.

 

[monzttr]

Reverting back to 388.2 did not solve the problem. It was just a coincidence that the problem started after upgrading the firmware. I accessed my Xfinity gateway and looked at the system uptime today, and it matches exactly when my WAN(0) link down went down. I'll try and get Xfinity to take a look.

 

[drinkingbird]

Reverting back to 388.2 did not solve the problem. It was just a coincidence that the problem started after upgrading the firmware. I accessed my Xfinity gateway and looked at the system uptime today, and it matches exactly when my WAN(0) link down went down. I'll try and get Xfinity to take a look.

They may be rolling out DOCSIS4 upgrades in your area.

 

[crkpot]

It would be interesting if you changed the time on your router an hour or 2 off to see if this happens at the same time.

 

[sfx2000]

Since I installed the latest Merlin, I have been having my WAN go down aright after 3am daily for the last week or so.

3AM - that's a maint window timeframe on the network side, so they may be doing network config/updates...

You can always check the modem logs and see what's happening there...

One good resource to check - https://www.dslreports.com/forum/comcast

They're pretty vocal, and there are Comcast team members that do check in from time to time...

 

[KevTech]

Comcast has been doing Automated iHAT testing.