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Cisco Bug: CSCvv36527 - UCS 2200 IOM Unexpectedly Reboots Without Any Core Files or Crashes

Last Modified

Oct 14, 2020

Products (1)

  • Cisco Unified Computing System

Known Affected Releases

4.0(4e)A 4.0(4h)A

Description (partial)

Symptom:
IOM unexpectedly reboots and comes back online by itself.

The FI logs will show that the IOM just becomes inaccessible without any reason why.

2020 Jul 29 02:46:58 inf-ucsmgm01vip-p-B %$ VDC-1 %$ %NOHMS-2-NOHMS_ENV_FEX_OFFLINE: FEX-1 Off-line (Serial Number FCH1930717E)
2020 Jul 29 02:46:58 inf-ucsmgm01vip-p-B %$ VDC-1 %$ %PFMA-2-FEX_STATUS: Fex 1 is offline (Serial number :Not Available)
2020 Jul 29 02:46:58 inf-ucsmgm01vip-p-B %$ VDC-1 %$ %CALLHOME-2-EVENT: FEX_OFFLINE
2020 Jul 29 02:46:59 inf-ucsmgm01vip-p-B %$ VDC-1 %$ %CALLHOME-2-EVENT: SAM_ALERT_DIAGNOSTIC_MAJOR
2020 Jul 29 02:47:18 inf-ucsmgm01vip-p-B %$ VDC-1 %$ last message repeated 7 times
2020 Jul 29 02:47:18 inf-ucsmgm01vip-p-B %$ VDC-1 %$ %UCSM-2-EQUIPMENT_INACCESSIBLE: [F0478][critical][equipment-inaccessible][sys/chassis-1/slot-2] right IOM 1/2 (B) is inaccessible			
2020 Jul 29 02:47:18 inf-ucsmgm01vip-p-B %$ VDC-1 %$ %UCSM-2-EQUIPMENT_INACCESSIBLE: [F0478][critical][equipment-inaccessible][sys/chassis-1/slot-1] left IOM 1/1 (A) is inaccessible			

The IOM logs will show that the IOM did a cold boot and the CPU reset register is all 0s (normal boot).

2020-07-28T00:46:38.809058+00:00 CMC NOCSN_platform_ohms-6-CMC  OBFL:0:main:*** PLATFORM POST ***
2020-07-28T00:46:38.811066+00:00 CMC NOCSN_platform_ohms-5-CMC  0:main:log level 6
2020-07-28T00:46:39.301563+00:00 CMC NOCSN_platform_ohms-6-CMC  OBFL:0:main: 00:46:38 up 1 min, load average: 1.36, 0.42, 0.14#012imgdev=/dev/mtdblock5 root=ramfs rw sysboot2 console=ttyS0,9600 board=soquel card_index=0x2b2f card_rev=0x0000 post=0x00000000 post_soquel=0x00000000 pcarev=0x258 ubootver=2.24 ubootlog=0x1ff7c28c quiet ubootbuild=3.1.3e ltc4215=0x00#012CMC Version:#012    4.0(4f)#012    Thu Mar 19 09:03:40 PDT 2020#012CMC kernel version: #012    2.6.10_mvl401-83#177ÿèÐ0
2020-07-28T00:46:39.301727+00:00 CMC NOCSN_platform_ohms-6-CMC  OBFL:0:main:CPU reset status register 0x00000000
2020-07-28T00:46:39.302010+00:00 CMC NOCSN_platform_ohms-3-CMC  0:main:CPU part and revision register 0x80c50021
2020-07-28T00:46:39.302581+00:00 CMC NOCSN_platform_ohms-6-CMC  OBFL:0:main:CPU part and revision register 0x80c50021
2020-07-28T00:46:39.303853+00:00 CMC NOCSN_platform_ohms-6-CMC  0:main:platform_health at 0x3001f000
2020-07-28T00:46:39.305614+00:00 CMC NOCSN_platform_ohms-3-CMC  0:main:Running POST

2020-07-29T00:50:26.458267+00:00 CMC NOCSN_<1595983826><45998>-2-CMC  satctrl: <<%SATCTRL-2-SATCTRL>> IOM-1   Module 1: Cold boot

Conditions:
2208 IOM
UCSM: 4.0(4e)
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