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2960s stack irrgular reboot

shiran.wang
Level 1
Level 1

i have a stack switch, but recently the switch irregular reboot.

sometimes one of the stack member switch reboot.

sometimes three of the stack member switch reboot.

the first time reboot i get the syslog as bellow.

May 20 11:43:21.285: %PLATFORM-1-CRASHED: Technical Support: http://www.cisco.com/techsupport (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: Copyright (c) 1986-2011 by Cisco Systems, Inc. (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: Compiled Thu 05-May-11 03:03 by prod_rel_team (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED:   (DSAT_C2960S_7F
May 20 11:43:21.291: %PLATFORM-1-CRASHED:   (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: SRR0 = 0x008F1110  SRR1 = 0x00029230  SRR2 = 0x008F112C  SRR3 = 0x00029230 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: ESR = 0x00000000  DEAR = 0x00000000  TSR = 0x84000000  DBSR = 0x01000000 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED:   (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: CPU Register Context: (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: Vector = 0x00002000  PC = 0x008F112C  MSR = 0x00029230  CR = 0x20000022 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: LR = 0x008
May 20 11:43:21.291: %PLATFORM-1-CRASHED: R0 = 0x00000000  R1 = 0x03505050  R2 = 0x00000000  R3 = 0x033F6008 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: R4 = 0x00000004  R5 = 0x0350505C  R6 = 0x0505A834  R7 = 0x00000003 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: R8 = 0x035053B0  R9 = 0x00000000  R10 = 0x00000000  R11 = 0x02A20000 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: R12 = 0x00000000  R13 = 0x00000280  R14 = 0x008EA124  R15 = 0x00000000 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: R16 = 0x00000000  R17 = 0x00000000  R18 = 0x00000000  R19 = 0x00000000 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.2
May 20 11:43:21.291: %PLATFORM-1-CRASHED: R24 = 0x02E60000  R25 = 0x02E70000  R26 = 0x0000445C  R27 = 0x00000001 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: R28 = 0x00000000  R29 = 0x02E70000  R30 = 0x02E70000  R31 = 0x0347D284 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED:   (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: Stack trace: (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: PC = 0x008F112C, SP = 0x03505050 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: Frame 00: SP = 0x03505080    PC = 0x008EA328 (DSAT_C2960S_7F_66-3)
May 20 11:43:21.291: %PLATFORM-1-CRASHED: Frame 01: SP = 0x0350
May 20 11:43:21.291: %PLATFORM-1-CRASHED:   (DSAT_C2960S_7F_66-3)

after this reboot, i upgrade the IOS to 15.2.

and today the switch suddenly reboot again.

------ ----- -----              ----------            ----------               
     1 52    WS-C2960S-48TD-L   15.0(2a)SE9           C2960S-UNIVERSALK9-M     
*    2 52    WS-C2960S-48TD-L   15.0(2a)SE9           C2960S-UNIVERSALK9-M     
     3 52    WS-C2960S-48TS-L   15.0(2a)SE9           C2960S-UNIVERSALK9-M     
     4 52    WS-C2960S-48LPS-L  15.0(2a)SE9           C2960S-UNIVERSALK9-M 

Switch#  Port 1     Port 2           Port 1   Port 2
--------------------------------------------------------
  1        Ok         Ok                3        2
  2        Ok         Ok                4        1
  3        Ok         Ok                4        1
  4        Ok         Ok                3        2

2 Replies 2

Reza Sharifi
Hall of Fame
Hall of Fame

If upgrading to 15.2 did not help, I recommend you open priority 1 ticket with TAC and send them sh tech and all the cash files you posted here for analysis. It appears you need immediate help with these switches as unexpected reboot is not good.

Good Luck

this is an IOS bug, I upgrade to 15.2 and now all switch work fine.

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