Diagnosing Random Reboots on R7800 Router

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James Greystone
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PostPosted: Sat Oct 22, 2022 19:36    Post subject: Diagnosing Random Reboots on R7800 Router Reply with quote
I always keep current with firmware releases, but every so often I get a random reboot of my 7800 on some of the firmwares.

The syslog is always deleted when this happens :*( so is there any other way to diagnose what is causing it without the syslog erasing?

Using the same firmwares on my R9000 I never get random reboots.

Thanks
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the-joker
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PostPosted: Sat Oct 22, 2022 22:44    Post subject: Reply with quote
You can setup a syslog server dd-wrt side and the server elsewhere on a connected machine and enable console_debug=1 that way the server keeps the logs even after router reboots.
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dale_gribble39
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PostPosted: Sun Oct 23, 2022 1:00    Post subject: Reply with quote
Or, you could log to a usb stick:

Log to pendrive

Log to pendrive

Save the log on the pendrive

Store logs on USB pendrives

System Log on USB

Logging on usb store AND remote monitoring

https://wiki.dd-wrt.com/wiki/index.php/Logging_with_DD-WRT

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blkt
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PostPosted: Sun Oct 23, 2022 1:43    Post subject: Re: Diagnosing Random Reboots on R7800 Router Reply with quote
James Greystone wrote:
...every so often I get a random reboot of my 7800 on some of the firmwares.
Wireless Advanced Settings? Firmware Type VANILLA, Protection Mode RTS/CTS None and RTS Threshold Disable.
Any other settings not default Network Mode, TurboQAM, Beacon/DTIM intervals, Sensitivity Range (ACK Timing)?
James Greystone
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Posts: 194

PostPosted: Sun Oct 23, 2022 14:03    Post subject: Re: Diagnosing Random Reboots on R7800 Router Reply with quote
blkt wrote:
James Greystone wrote:
...every so often I get a random reboot of my 7800 on some of the firmwares.
Wireless Advanced Settings? Firmware Type VANILLA, Protection Mode RTS/CTS None and RTS Threshold Disable.
Any other settings not default Network Mode, TurboQAM, Beacon/DTIM intervals, Sensitivity Range (ACK Timing)?


Wireless Advanced Settings:
Vanilla
Protection Mode RTS/CTS None
RTS Threshold Disable

Only Item I have changed in advanced is

Domain to Australia
Network Mode for 5ghz is ac/n Mixed / vht 80+80
Network Mode for 2.4ghz is n/g Mixed Full 20

Every other setting I have left at default as speed is good and no other issues.
James Greystone
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Posts: 194

PostPosted: Sun Oct 23, 2022 14:04    Post subject: Reply with quote
dale_gribble39 wrote:
Or, you could log to a usb stick:

Log to pendrive

Log to pendrive

Save the log on the pendrive

Store logs on USB pendrives

System Log on USB

Logging on usb store AND remote monitoring

https://wiki.dd-wrt.com/wiki/index.php/Logging_with_DD-WRT


I have a few spare USB sticks lying around, I will investigate setting this up. Much Appreciated.
egc
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Location: Netherlands

PostPosted: Sun Oct 23, 2022 14:09    Post subject: Reply with quote
I have seen this with failing power supplies (or other hardware related problems) also.

Moving this thread to Atheros forum

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Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
James Greystone
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PostPosted: Sun Oct 23, 2022 14:32    Post subject: Reply with quote
Does this look correct? or am I missing something. A tad over my head even after reading the info in the other thread.

Thanks everyone.
egc
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PostPosted: Sun Oct 23, 2022 14:55    Post subject: Reply with quote
Almost there Wink

See attached doc

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Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087


Last edited by egc on Wed Dec 14, 2022 10:06; edited 1 time in total
James Greystone
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Joined: 20 Nov 2011
Posts: 194

PostPosted: Sun Oct 23, 2022 16:36    Post subject: Reply with quote
egc wrote:
Almost there Wink

See attached doc


Thank You as always egc. Wink
James Greystone
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Joined: 20 Nov 2011
Posts: 194

PostPosted: Wed Dec 14, 2022 1:13    Post subject: Reply with quote
I think I did everything right, according to instructions, it just rebooted, but when I look in the syslog it is empty.

Last edited by James Greystone on Wed Dec 14, 2022 1:46; edited 2 times in total
James Greystone
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Joined: 20 Nov 2011
Posts: 194

PostPosted: Wed Dec 14, 2022 2:58    Post subject: Reply with quote
after reboot the log is empty?
James Greystone
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Joined: 20 Nov 2011
Posts: 194

PostPosted: Wed Dec 14, 2022 3:48    Post subject: Reply with quote
This is in commands
egc
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Location: Netherlands

PostPosted: Wed Dec 14, 2022 7:46    Post subject: Reply with quote
That is not going to work.

From your windows PC using Minitool Partition Wizard
Wipe the USB stick
Make two equally large partitions format as ext2 name one "opt" and the other "jffs" (without the quotes)
Under Shares/Name, name the one with Path /opt: opt and the other with Path /jffs: jffs

You do not need a user in Samba

Then use this in Administration/commands and Save as Startup:
Code:
killall syslogd
syslogd -L -Z -s 8192 -O /opt/messages

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Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
Alozaros
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Location: UK, London, just across the river..

PostPosted: Wed Dec 14, 2022 9:48    Post subject: Reply with quote
egc wrote:
That is not going to work.

From your windows PC using Minitool Partition Wizard
Wipe the USB stick
Make two equally large partitions format as ext2 name one "opt" and the other "jffs" (without the quotes)
Under Shares/Name, name the one with Path /opt: opt and the other with Path /jffs: jffs

You do not need a user in Samba

Then use this in Administration/commands and Save as Startup:
Code:
killall syslogd
syslogd -L -Z -s 8192 -O /opt/messages


this will not show you the "very first boot messages"...but for the later events...it does work...kind's of... there was a thread about how to syslog locally...but, various results... Cool

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