Problem with sudden reboots

[Sistemas_Juaneda]

Greetings,

We recently purchased an EX2052R-P. It operates normally until it suddenly reboots, sometimes 2 consecutive times. Looking at the events of cnMaestro it only shows “STATUS_DOWN” and “STATUS_UP” when it reboots.

We tried to upgrading the CNS Software version, but this fixed nothing. We also changed the power output with the same result.

Any ideas?

[Simon_King]

Is there anything shown in the on-device logs?

Useful cnMatrix Troubleshooting commands

Summary: This article illustrates some useful Command-Line interface (CLI) commands that can help when troubleshooting an issue. Support may also ask for these when a case has been raised. How to login to the CLI and capture output We recommend using a free SSH client to connect to the Switch, PuTTy being a well known and used example. Before you login to the Switch, set the session output to log to a file. [Puttylog] Enter the IP address of the Switch into the connection page and click Ope…

[TamN]

Hello, please connect to the switch via SSH and retrieve the output for below CLI commands:
show system info
show os last exception

Thanks.

[DigitalMan2020]

Hi, sorry to jump into this thread but I tried the show os last exception on my TX 2012RP and that command failed, said “no such file or directory”

[TamN]

Hi, the switch’s message “no such file or directory” when executing the command ‘show os last exception’ indicates there had been no fault by the switch that would cause the auto reboot. If your switch had rebooted itself previously it must be for some other reason. The reboot reason is displayed in ‘show system info’ under the field ‘Last Reboot Reason’.

[Kodabaccus_Muhammad (Najiib)]

Hi,

I am having the same issue on several cambium switch.
The reboot reason in the ‘show system info’ is segmentation fault:

The output of ‘show os last exception’:

Device > show os last exception

ISS version: 4.3-r3
Date: Wed Oct 12 18:45:51 UTC 2022
Time: 18:45:51 up 21 min, load average: 0.37, 0.26, 0.19
*** Segmentation fault
Register dump:

R0: 00000000 R1: 00000000 R2: 00000001 R3: 00000000
R4: 00000000 R5: 00000000 R6: 00000000 R7: 00000152
R8: af6febe8 R9: a7b7a4ec SL: a5a8f694 FP: a5a8ec84
IP: 00000001 SP: a5a8ec68 LR: 01092af8 PC: 010928ec

CPSR: 20000010

Trap: 0000000e Error: 00000017 OldMask: 00000000
Addr: 000000fc

Backtrace:
/usr/bin/ISS.exe(AstSelectContextFromTmrInfo+0x24)[0x10928ec]
/usr/bin/ISS.exe(AstTmrExpiryHandler+0xd0)[0x1092af8]
/usr/bin/ISS.exe(AstTaskMain+0x4f8)[0x1070114]
/usr/bin/ISS.exe[0x2078efc]
/lib/libpthread.so.0(+0x6e8c)[0xb6f4de8c]

Memory map:

00010000-02ad5000 r-xp 00000000 00:02 209 /usr/bin/ISS.exe
02ae5000-03762000 rw-p 02ac5000 00:02 209 /usr/bin/ISS.exe
03762000-05655000 rw-p 00000000 00:00 0 [heap]
82800000-82862000 rw-p 00000000 00:00 0
82862000-82900000 —p 00000000 00:00 0
82918000-82bfb000 rw-p 00000000 00:00 0
82bfb000-82bfc000 —p 00000000 00:00 0
82bfc000-833fb000 rw-p 00000000 00:00 0
833fb000-833fc000 —p 00000000 00:00 0
833fc000-83bfb000 rw-p 00000000 00:00 0
83bfb000-83bfc000 —p 00000000 00:00 0
83bfc000-843fb000 rw-p 00000000 00:00 0
843fb000-843fc000 —p 00000000 00:00 0
843fc000-84bfb000 rw-p 00000000 00:00 0
84bfb000-84bfc000 —p 00000000 00:00 0
84bfc000-853fb000 rw-p 00000000 00:00 0
853fb000-853fc000 —p 00000000 00:00 0
853fc000-85bfb000 rw-p 00000000 00:00 0
85bfb000-85bfc000 —p 00000000 00:00 0
85bfc000-863fb000 rw-p 00000000 00:00 0
863fb000-863fc000 —p 00000000 00:00 0
863fc000-8c000000 rw-p 00000000 00:00 0
8c000000-8c001000 —p 00000000 00:00 0
8c001000-8c800000 rw-p 00000000 00:00 0
8c800000-8c85a000 rw-p 00000000 00:00 0
8c85a000-8c900000 —p 00000000 00:00 0
8c908000-8c9bb000 rw-p 00000000 00:00 0
8c9bb000-8c9bc000 —p 00000000 00:00 0
8c9bc000-8d340000 rw-p 00000000 00:00 0
8d340000-8d341000 —p 00000000 00:00 0
8d341000-8db40000 rw-p 00000000 00:00 0
8db40000-8db41000 —p 00000000 00:00 0
8db41000-8e340000 rw-p 00000000 00:00 0
8e340000-8e341000 —p 00000000 00:00 0
8e341000-8eb8f000 rw-p 00000000 00:00 0
8eb8f000-8eb90000 —p 00000000 00:00 0
8eb90000-8f480000 rw-p 00000000 00:00 0
8f480000-8f481000 —p 00000000 00:00 0
8f481000-8fc80000 rw-p 00000000 00:00 0
8fc80000-8fc81000 —p 00000000 00:00 0
8fc81000-90480000 rw-p 00000000 00:00 0
90480000-90481000 —p 00000000 00:00 0
90481000-90c80000 rw-p 00000000 00:00 0
90c80000-90c81000 —p 00000000 00:00 0
90c81000-91480000 rw-p 00000000 00:00 0
91480000-91481000 —p 00000000 00:00 0
91481000-91c80000 rw-p 00000000 00:00 0
91c80000-91c81000 —p 00000000 00:00 0
91c81000-93c5f000 rw-p 00000000 00:00 0
93c5f000-93c60000 —p 00000000 00:00 0
93c60000-9445f000 rw-p 00000000 00:00 0
9445f000-94460000 —p 00000000 00:00 0
94460000-94c5f000 rw-p 00000000 00:00 0
94c5f000-94c60000 —p 00000000 00:00 0
94c60000-9545f000 rw-p 00000000 00:00 0
9545f000-95460000 —p 00000000 00:00 0
95460000-95d00000 rw-p 00000000 00:00 0
95d00000-95d01000 —p 00000000 00:00 0
95d01000-96500000 rw-p 00000000 00:00 0
96500000-96501000 —p 00000000 00:00 0
96501000-96d00000 rw-p 00000000 00:00 0
96d00000-96e00000 rw-p 00000000 00:00 0
96e23000-96eee000 rw-p 00000000 00:00 0
96eee000-96eef000 —p 00000000 00:00 0
96eef000-97800000 rw-p 00000000 00:00 0
97800000-978fb000 rw-p 00000000 00:00 0
978fb000-97900000 —p 00000000 00:00 0
97919000-97cf5000 rw-p 00000000 00:00 0
97cf5000-97cf6000 —p 00000000 00:00 0
97cf6000-98980000 rw-p 00000000 00:00 0
98980000-98981000 —p 00000000 00:00 0
98981000-992bd000 rw-p 00000000 00:00 0
992bd000-992be000 —p 00000000 00:00 0
992be000-99abd000 rw-p 00000000 00:00 0
99abd000-99abe000 —p 00000000 00:00 0
99abe000-9a2fd000 rw-p 00000000 00:00 0
9a2fd000-9a2fe000 —p 00000000 00:00 0
9a2fe000-9ac1d000 rw-p 00000000 00:00 0
9ac1d000-9ac1e000 —p 00000000 00:00 0
9ac1e000-9b41d000 rw-p 00000000 00:00 0
9b41d000-9b41e000 —p 00000000 00:00 0
9b41e000-9bc1d000 rw-p 00000000 00:00 0
9bc1d000-9bc1e000 —p 00000000 00:00 0
9bc1e000-9c41d000 rw-p 00000000 00:00 0
9c41d000-9c41e000 —p 00000000 00:00 0
9c41e000-9cc41000 rw-p 00000000 00:00 0
9cc41000-9cc42000 —p 00000000 00:00 0
9cc42000-9d66d000 rw-p 00000000 00:00 0
9d66d000-9d66e000 —p 00000000 00:00 0
9d66e000-9df00000 rw-p 00000000 00:00 0
9df00000-9dffe000 rw-p 00000000 00:00 0
9dffe000-9e000000 —p 00000000 00:00 0
9e006000-9e053000 rw-p 00000000 00:00 0
9e053000-9e054000 —p 00000000 00:00 0
9e054000-9eb00000 rw-p 00000000 00:00 0
9eb00000-9ec00000 rw-p 00000000 00:00 0
9ec14000-9ecaa000 rw-p 00000000 00:00 0
9ecaa000-9ecab000 —p 00000000 00:00 0
9ecab000-9f4cb000 rw-p 00000000 00:00 0
9f4cb000-9f4cc000 —p 00000000 00:00 0
9f4cc000-a050e000 rw-p 00000000 00:00 0
a050e000-a050f000 —p 00000000 00:00 0
a050f000-a0d0e000 rw-p 00000000 00:00 0
a0d0e000-a0d0f000 —p 00000000 00:00 0
a0d0f000-a1531000 rw-p 00000000 00:00 0
a1531000-a1532000 —p 00000000 00:00 0
a1532000-a1f9d000 rw-p 00000000 00:00 0
a1f9d000-a1f9e000 —p 00000000 00:00 0
a1f9e000-a5290000 rw-p 00000000 00:00 0
a5290000-a5291000 —p 00000000 00:00 0
a5291000-a5a90000 rw-p 00000000 00:00 0
a5a90000-a5a91000 —p 00000000 00:00 0
a5a91000-a62d8000 rw-p 00000000 00:00 0
a62d8000-a62d9000 —p 00000000 00:00 0
a62d9000-a6b00000 rw-p 00000000 00:00 0
a6b00000-a6b01000 —p 00000000 00:00 0
a6b01000-a7300000 rw-p 00000000 00:00 0
a7300000-a7301000 —p 00000000 00:00 0
a7301000-a7b00000 rw-p 00000000 00:00 0
a7b00000-a7bff000 rw-p 00000000 00:00 0
a7bff000-a7c00000 —p 00000000 00:00 0
a7c1d000-a7c1e000 —p 00000000 00:00 0
a7c1e000-a844b000 rw-p 00000000 00:00 0
a844b000-a844c000 —p 00000000 00:00 0
a844c000-a8c4b000 rw-p 00000000 00:00 0
a8c4b000-a8c4c000 —p 00000000 00:00 0
a8c4c000-acc7b000 rw-p 00000000 00:00 0
acc7b000-acc7c000 —p 00000000 00:00 0
acc7c000-adb3f000 rw-p 00000000 00:00 0
adb3f000-adb40000 —p 00000000 00:00 0
adb40000-aed00000 rw-p 00000000 00:00 0
aed00000-aedfb000 rw-p 00000000 00:00 0
aedfb000-aee00000 —p 00000000 00:00 0
aee03000-aef00000 rw-p 00000000 00:00 0
aef00000-aef01000 —p 00000000 00:00 0
aef01000-af700000 rw-p 00000000 00:00 0
af700000-af7ff000 rw-p 00000000 00:00 0
af7ff000-af800000 —p 00000000 00:00 0
af81f000-af8e3000 rw-p 00000000 00:00 0
af8e3000-af8e4000 —p 00000000 00:00 0
af8e4000-b08cf000 rw-p 00000000 00:00 0
b08cf000-b08d0000 —p 00000000 00:00 0
b08d0000-b10cf000 rw-p 00000000 00:00 0
b10cf000-b10d0000 —p 00000000 00:00 0
b10d0000-b2912000 rw-p 00000000 00:00 0
b2912000-b2922000 rw-s 84000000 00:02 302 /dev/mvMbusDrv
b2922000-b2932000 rw-s 80000000 00:02 302 /dev/mvMbusDrv
b2932000-b2a32000 rw-s fc000000 00:02 302 /dev/mvMbusDrv
b2a32000-b6a32000 rw-s f8000000 00:02 302 /dev/mvMbusDrv
b6a32000-b6b32000 rw-s f1000000 00:02 302 /dev/mvMbusDrv
b6b32000-b6d32000 rw-s 1ee00000 00:02 323 /dev/mvDmaDrv
b6d32000-b6e5a000 r-xp 00000000 00:02 387 /lib/libc-2.15.so
b6e5a000-b6e6a000 —p 00128000 00:02 387 /lib/libc-2.15.so
b6e6a000-b6e6c000 r–p 00128000 00:02 387 /lib/libc-2.15.so
b6e6c000-b6e6d000 rw-p 0012a000 00:02 387 /lib/libc-2.15.so
b6e6d000-b6e70000 rw-p 00000000 00:00 0
b6e70000-b6e7a000 r-xp 00000000 00:02 380 /lib/libgcc_s.so.1
b6e7a000-b6e89000 —p 0000a000 00:02 380 /lib/libgcc_s.so.1
b6e89000-b6e8a000 rw-p 00009000 00:02 380 /lib/libgcc_s.so.1
b6e8a000-b6e90000 r-xp 00000000 00:02 368 /lib/librt-2.15.so
b6e90000-b6e9f000 —p 00006000 00:02 368 /lib/librt-2.15.so
b6e9f000-b6ea0000 r–p 00005000 00:02 368 /lib/librt-2.15.so
b6ea0000-b6ea1000 rw-p 00006000 00:02 368 /lib/librt-2.15.so
b6ea1000-b6ea5000 r-xp 00000000 00:02 379 /lib/libdl-2.15.so
b6ea5000-b6eb4000 —p 00004000 00:02 379 /lib/libdl-2.15.so
b6eb4000-b6eb5000 r–p 00003000 00:02 379 /lib/libdl-2.15.so
b6eb5000-b6eb6000 rw-p 00004000 00:02 379 /lib/libdl-2.15.so
b6eb6000-b6ebb000 r-xp 00000000 00:02 149 /usr/lib/libswd.so
b6ebb000-b6eca000 —p 00005000 00:02 149 /usr/lib/libswd.so
b6eca000-b6ecb000 rw-p 00004000 00:02 149 /usr/lib/libswd.so
b6ecb000-b6f36000 r-xp 00000000 00:02 369 /lib/libm-2.15.so
b6f36000-b6f45000 —p 0006b000 00:02 369 /lib/libm-2.15.so
b6f45000-b6f46000 r–p 0006a000 00:02 369 /lib/libm-2.15.so
b6f46000-b6f47000 rw-p 0006b000 00:02 369 /lib/libm-2.15.so
b6f47000-b6f5c000 r-xp 00000000 00:02 361 /lib/libpthread-2.15.so
b6f5c000-b6f6b000 —p 00015000 00:02 361 /lib/libpthread-2.15.so
b6f6b000-b6f6c000 r–p 00014000 00:02 361 /lib/libpthread-2.15.so
b6f6c000-b6f6d000 rw-p 00015000 00:02 361 /lib/libpthread-2.15.so
b6f6d000-b6f6f000 rw-p 00000000 00:00 0
b6f6f000-b6f73000 r-xp 00000000 00:02 384 /lib/libSegFault.so
b6f73000-b6f82000 —p 00004000 00:02 384 /lib/libSegFault.so
b6f82000-b6f83000 r–p 00003000 00:02 384 /lib/libSegFault.so
b6f83000-b6f84000 rw-p 00004000 00:02 384 /lib/libSegFault.so
b6f84000-b6fa3000 r-xp 00000000 00:02 370 /lib/ld-2.15.so
b6fae000-b6faf000 rw-s 00000000 00:0f 1290 /dev/shm/sem.i2c
b6faf000-b6fb3000 rw-p 00000000 00:00 0
b6fb3000-b6fb4000 r–p 0001f000 00:02 370 /lib/ld-2.15.so
b6fb4000-b6fb5000 rw-p 00020000 00:02 370 /lib/ld-2.15.so
beabc000-beadd000 rw-p 00000000 00:00 0 [stack]
beb26000-beb27000 r-xp 00000000 00:00 0 [sigpage]
ffff0000-ffff1000 r-xp 00000000 00:00 0 [vectors]

Did anyone find a fix for this issue?

Regards,