Connectrix Cisco: Switchen er slukket på grund af kernelpanik

Summary: MDS-switchen var nede og blev ikke genindlæst efter kernelpanik. En bruger skulle tænde kontakten manuelt.

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Symptoms

Output fra Stack-Trace viser kun fem ud af seks CPU'er online, fordi Switch var offline og ikke blev genindlæst.

`show system reset-reason`
----- reset reason for module 1 (from Supervisor in slot 1) ---
1) At 65175 usecs after Tue Oct 13 02:48:39 2020
    Reason: Kernel Panic
    Service:
    Version: 8.1(1a)

‘show logging nvram’
2020 Oct 14 18:44:02.277 switch %SYSLOG-2-SYSTEM_MSG : Syslogs wont be logged into logflash until logflash is online
2020 Oct 14 18:44:05.851 switch %KERN-0-SYSTEM_MSG: [    0.036807] Host controller irq 55 - kernel
2020 Oct 14 18:44:05.880 switch %KERN-0-SYSTEM_MSG: [    0.057612] Assign root port irq 55 - kernel
2020 Oct 14 18:44:05.881 switch %KERN-0-SYSTEM_MSG: [    0.057633] Host controller irq 54 - kernel
2020 Oct 14 18:44:05.883 switch %KERN-0-SYSTEM_MSG: [    0.059007] Assign root port irq 54 - kernel
2020 Oct 14 18:44:05.912 switch %KERN-0-SYSTEM_MSG: [    0.774555] Enabling all PCI devices - kernel

‘show logging onboard module stack-trace’
CPU 0
Call Trace:
[b0463bc4] do_raw_spin_lock+0xec/0x120(unreliable)
[b0698738] dev_watchdog+0x58/0x29c
[b04324c4] call_timer_fn+0x48/0xfc
[b0432770] run_timer_softirq+0x1f4/0x248
[b042af38] __do_softirq+0x16c/0x368
[b042b428] irq_exit+0x68/0x90
[b040a3c8] timer_interrupt+0x204/0x278
[b040f388] ret_from_except+0x0/0x18

CPU 1   Process: swapper/1 (pid 0)
Call Trace:
[b04230a4] cpm_idle_wait+0x14/0x24(unreliable)
[b0469d4c] cpu_startup_entry+0x124/0x1e8
[b0410d78] start_secondary+0x1fc/0x200
[b0402234] start_secondary_47x+0x24/0x48

CPU 2   Process: sysinfo (pid 3855)
Call Trace:
[b0480d58] smp_call_function_many+0x268/0x274(unreliable)
[b04182f8] flush_tlb_mm+0x58/0x68
[b042532c] copy_process.part.69+0xbb0/0x11a0
[b0425a84] do_fork+0xd0/0x318
[b040ecac] ret_from_syscall+0x0/0x3c

CPU 3   Process: swapper/3 (pid 0)
Call Trace:
[b04230a4] cpm_idle_wait+0x14/0x24(unreliable)
[b0469d4c] cpu_startup_entry+0x124/0x1e8
[b0410d78] start_secondary+0x1fc/0x200
[b0402234] start_secondary_47x+0x24/0x48

CPU 4   Process: swapper/4 (pid 0)
Call Trace:
[b04230a4] cpm_idle_wait+0x14/0x24(unreliable)
[b0469d4c] cpu_startup_entry+0x124/0x1e8
[b0410d78] start_secondary+0x1fc/0x200
[b0402234] start_secondary_47x+0x24/0x48

 

Cause

En af CPU'erne var offline, hvilket fik kontakten til at slukke.

 

Resolution

Permanent løsning:

  • Hvis alle seks CPU'er ikke er online, skal du udskifte switchen og sikre dig, at den nye switch kører på NX-OS v8.4(1a) eller nyere.
  • Hvis alle seks CPU'er er online, skal du opgradere firmwaren til NX-OS v8.4 (1a) eller nyere for at undgå gentagelse.

 

Additional Information

Dette gælder kun for Cisco MDS-9396s-switche.

 

Affected Products

Connectrix MDS 9396S
Article Properties
Article Number: 000181486
Article Type: Solution
Last Modified: 03 Apr 2026
Version:  2
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