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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)

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

2208 IOM
UCSM: 4.0(4e)
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