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2960s Stack IOS Upgade - Reboot Loop

bartosikr1
Level 1
Level 1

All - Tried to upgrade 5 2960s Stacks from IOS 15.0(2a)SE9 to the following IOS -

c2960s-universalk9-mz.152-2.E7.bin

Once we did this we were faced with a continuous switch stack reboot on all 5 stacks with the below error output.

 

Has anyone experienced this issue? Is this ver. not compatible with the 2960s or could this be a bug in the IOS?

 

Thanks,

 

19:00:42 GMT Sun Jan 1 2006: Unexpected exception to CPUvector 2000, PC = 235615C

-Traceback= 0x235615Cz 0x16A92A8z 0x16DD360z 0x169D90Cz 0x21A936Cz 0x21A56ECz

 

Writing crashinfo to flash:/crashinfo_ext/crashinfo_ext_10

 

=== Flushing messages (19:00:50 GMT Sun Jan 1 2006) ===

 

Buffered messages:

Queued messages:

*Jan  1 19:00:50: %SYS-3-LOGGER_FLUSHING: System pausing to ensure console debugging output.

 

*Mar  1 00:00:23.236: Read env variable - LICENSE_BOOT_LEVEL =

*Jan  2 00:00:00.576: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module name = c2960s_lanbase Next reboot level = lanbase and License = lanbase

*Jan  2 00:00:25.695: %STACKMGR-4-SWITCH_ADDED: Switch 1 has been ADDED to the stack

*Jan  2 00:00:28.479: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down

*Jan  2 00:00:28.479: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0, changed state to down

*Jan  2 00:00:28.605: %SMI-5-CLIENT:  Smart Install Client feature is enabled. It is recommended to disable the Smart Install feature when it is not actively used. To disable feature execute 'no vstack' in configuration mode

*Jan  2 00:00:30.634: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for type vlan

*Jan  1 19:00:38: %SYS-6-CLOCKUPDATE: System clock has been updated from 00:00:38 UTC Mon Jan 2 2006 to 19:00:38 GMT Sun Jan 1 2006, configured from console by console.

*Jan  1 19:00:38: %SYS-6-CLOCKUPDATE: System clock has been updated from 19:00:38 GMT Sun Jan 1 2006 to 19:00:38 GMT Sun Jan 1 2006, configured from console by console.

*Jan  1 19:00:41: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan501, changed state to down

*Jan  1 19:00:41: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan601, changed state to down

*Jan  1 19:00:42: %SYS-5-CONFIG_I: Configured from memory by console

*Jan  1 19:00:42: %STACKMGR-5-SWITCH_READY: Switch 1 is READY

*Jan  1 19:00:42: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state DOWN

*Jan  1 19:00:42: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state DOWN

Cisco IOS Software, C2960S Software (C2960S-UNIVERSALK9-M), Version 15.2(2)E7, RELEASE SOFTWARE (fc3)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2017 by Cisco Systems, Inc.

Compiled Wed 12-Jul-17 12:40 by prod_rel_team

 

Debug Exception (Could be NULL pointer dereference) Exception (0x2000)!

SRR0 = 0x01822960  SRR1 = 0x00029230  SRR2 = 0x0235615C  SRR3 = 0x00029230

ESR = 0x00000000  DEAR = 0x00000000  TSR = 0x84000000  DBSR = 0x01000000

 

CPU Register Context:

Vector = 0x00002000  PC = 0x0235615C  MSR = 0x00029230  CR = 0x40224048

LR = 0x016A92A8  CTR = 0x00000040  XER = 0x00000014

R0 = 0x00000003  R1 = 0x05ECDD98  R2 = 0x00000000  R3 = 0x00000000

R4 = 0x05ECDDEC  R5 = 0x00000041  R6 = 0x00004800  R7 = 0x00000020

R8 = 0x00099000  R9 = 0x033A0000  R10 = 0x033C0000  R11 = 0x033C0000

R12 = 0x000101F2  R13 = 0x00000280  R14 = 0x20208044  R15 = 0x00000001

R16 = 0x05F5EBF0  R17 = 0x00001DA4  R18 = 0x05ECDDAC  R19 = 0x00000000

R20 = 0x05EF7EEA  R21 = 0x00000001  R22 = 0x00000000  R23 = 0xFFFFFFFF

R24 = 0x05ECDDEC  R25 = 0x00000000  R26 = 0x05ECDDEC  R27 = 0x05EF7AF4

R28 = 0x00000003  R29 = 0x00000385  R30 = 0x05EF7EE0  R31 = 0x05EF9624

 

Stack trace:

PC = 0x0235615C, SP = 0x05ECDD98

Frame 00: SP = 0x05ECDF30    PC = 0x016A91C0

Frame 01: SP = 0x05ECDFF0    PC = 0x016DD360

Frame 02: SP = 0x05ECE0D8    PC = 0x0169D90C

Frame 03: SP = 0x05ECE0E0    PC = 0x021A936C

Frame 04: SP = 0x00000000    PC = 0x021A56EC

 

 

1 Accepted Solution

Accepted Solutions

marce1000
VIP
VIP

 

 - If it's stack related , then examine this , by breaking the stack and try this on  a single box only; check if the problem persists. If so roll back or try another IOS version, more recent or even gold-starred, if  possible.

M.



-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
    When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

View solution in original post

3 Replies 3

marce1000
VIP
VIP

 

 - If it's stack related , then examine this , by breaking the stack and try this on  a single box only; check if the problem persists. If so roll back or try another IOS version, more recent or even gold-starred, if  possible.

M.



-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
    When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

Do not, I repeat, Do not use 15.2.2 E7 on a 2960s.  Although it shows available, it will do a continuing boot load on the switch.  Only way out of it on a 2960s is to Rommon and Xmodem the previous code.  In my case 15.2.2 E5 works fine.  On a stack of 4 and production environment, this ended up being a long night!

Leo Laohoo
Hall of Fame
Hall of Fame
Try a different version. Looks like an IOS bug.
Once this is stable, contact TAC and get them to analyze this.
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