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Display the Crash Stack Traceback and Registration Information

Purpose

To display the crash stack traceback and registration information.

Action

To display the crash stack traceback and registration information, follow these steps:

Exit from the CLI environment and create a UNIX-level shell by entering the start shell command:
user@host> start shell
Type su and the root password when prompted. You are now in the shell and prompt is % instead of >, for example:
% su Password: ****
Establish a vty session to the appropriate component. Use the vty command followed by the executable name for the component; for example, scb, ssb0, ssb1, fpc0, or fpc1:
root@host% vty sfm0
Note: For the M40e and M160 routers, you can also create a cty session to the components if the components are not online.
Type the show nvram command to view the NVRAM information.
Type the show syslog messages command to view the system log messages.

Sample Output 1

user@host> start shell

% su
Password: ****
root@host% vty sfm0

SFM platform (266Mhz PPC 603e processor, 64Mb memory, 512Kb flash)
SFM3(host vty)# show nvram
System NVRAM :
 4080 available bytes, 4080 used, 0 free
 Contents:

mpc106 machine check caused by error on the PCI Bus
mpc106 error detect register 1: 0x08, 2: 0x00
mpc106 error ack count = 0
mpc106 error address: 0x0a000000
mpc106 PCI bus error status register: 0x02
   mpc106 was the PCI master
   C/BE bits: I/O read [0b0010]
mpc106 error detection reg1: PCI cycle 
mpc106 PCI status reg: parity error 

System Exception: Vector/Code 0x00700, Signal 4
Event occurred at: Oct 26 13:32:40.952 

Juniper Embedded Microkernel Version 4.2R1
Built by tlim on 2000-09-23 06:11:28 UTC
Copyright (C) 1998-2000, Juniper Networks, Inc.
All rights reserved.
Reason string: "Program Check"
Context: Thread (PFE Manager)

Registers:
R00: 0x06f5f81c R01: 0x06f5f9cc R02: 0x00003344 R03: 0x00000000 
R04: 0x00008000 R05: 0x00000000 R06: 0x0010052c R07: 0x06f637e4 
R08: 0x06f5f81c R09: 0x00169810 R10: 0x000000e8 R11: 0x00000001 
R12: 0x00046cdf R13: 0xffffffff R14: 0xffffffff R15: 0xffffffff 
R16: 0xffffffff R17: 0xffffffff R18: 0xffffffff R19: 0xffffffff 
R20: 0xffffffff R21: 0xffffffff R22: 0xffffffff R23: 0xffffffff 
R24: 0x00000003 R25: 0x00000000 R26: 0x00000001 R27: 0x0000fc78 
R28: 0x00150000 R29: 0x0016c4b0 R30: 0x06f5eb7c R31: 0x97cb1d36 
MSR: 0x0008b030 CTR: 0x000ac008 Link:0x06f5f81c SP:  0x06f5f9cc
CCR: 0x22200024 XER: 0x20000000 PC:  0x06f5f81c
DSISR: 0x00000000 DAR: 0xffffffff K_MSR: 0x00001030

Stack Traceback :

Frame 01: sp = 0x06f5f9cc, pc = 0x06f5f81c
Frame 02: sp = 0x06f5f9e4, pc = 0x000c7e28
Frame 03: sp = 0x06f5fa04, pc = 0x00026620

ROM NVRAM:
 0 available bytes, 0 used, 0 free
SFM3(host vty)#  show syslog messages

Oct 26 12:02:05 router tnp_sfm_2 PFEMAN: sent Resync request to Master
Oct 26 12:02:07 router tnp_sfm_3 CM(3): Slot 1: On-line
Oct 26 12:02:07 router tnp_sfm_3 CM(3): Slot 2: On-line
Oct 26 12:02:07 router tnp_sfm_3 CM(3): Slot 6: On-line
Oct 26 12:02:07 router tnp_sfm_3 PFEMAN: sent Resync request to Master
Oct 26 12:05:58 router tnp_sfm_3 mpc106 machine check caused by error on the
PCI Bu
s
Oct 26 12:05:58 router tnp_sfm_3 mpc106 error detect register 1: 0x08,
2: 0x00
Oct 26 12:05:58 router tnp_sfm_3 mpc106 error ack count = 0
Oct 26 12:05:58 router tnp_sfm_3 mpc106 error address: 0x0a000000
Oct 26 12:05:58 router tnp_sfm_3 mpc106 PCI bus error status register: 0x02
Oct 26 12:05:58 router tnp_sfm_3 mpc106 was the PCI master
Oct 26 12:05:58 router tnp_sfm_3 C/BE bits: I/O read [0b0010]
Oct 26 12:05:58 router tnp_sfm_3 mpc106 error detection reg1: PCI cycle
Oct 26 12:05:58 router tnp_sfm_3 mpc106 PCI status reg: parity error
Oct 26 12:05:58 router tnp_sfm_3 ^B
Oct 26 12:05:58 router tnp_sfm_3 last message repeated 7 times
Oct 26 12:05:58 router tnp_sfm_3 Registers:
Oct 26 12:05:58 router tnp_sfm_3 R00: 0x06f5f81c R01: 0x06f5f9cc
R02: 0x00003344 R0
3: 0x00000000
Oct 26 12:05:58 router tnp_sfm_3 R04: 0x00008000 R05: 0x00000000
R06: 0x0010052c R0
7: 0x06f637e4
Oct 26 12:05:58 router tnp_sfm_3 R08: 0x06f5f81c R09: 0x00169810
R10: 0x000003b4 R1
1: 0x00000001
Oct 26 12:05:58 router tnp_sfm_3 R12: 0x00017b97 R13: 0xffffffff
R14: 0xffffffff R1
5: 0xffffffff
Oct 26 12:05:58 router tnp_sfm_3 R16: 0xffffffff R17: 0xffffffff
R18: 0xffffffff R1
9: 0xffffffff
Oct 26 12:05:58 router tnp_sfm_3 R20: 0xffffffff R21: 0xffffffff
R22: 0xffffffff R2
3: 0xffffffff
Oct 26 12:05:58 router tnp_sfm_3 R24: 0x00000003 R25: 0x00000000
R26: 0x00000001 R2
7: 0x0000fc78
Oct 26 12:05:58 router tnp_sfm_3 R28: 0x00150000 R29: 0x0016c4b0
R30: 0x06f5eb7c R3
1: 0x97c9c35e
Oct 26 12:05:58 router tnp_sfm_3 MSR: 0x0008b030 CTR: 0x000ac008
Link:0x06f5f81c SP
:  0x06f5f9cc
Oct 26 12:05:58 router tnp_sfm_3 CCR: 0x22200024 XER: 0x20000000
PC:  0x06f5f81c
Oct 26 12:05:58 router tnp_sfm_3 DSISR: 0x00000000 DAR: 0xffffffff
K_MSR: 0x0000103
0

Sample Output

crash stack tracebackThe following sample output is another example of displaying the crash stack registration informationtraceback and registration information:

root@host% vty fpc1
FPC160 platform (PPC 603e processor, 32Mb memory, 512Kb flash)

FPC1(host vty)# show nvram
System NVRAM :
 4080 available bytes, 4080 used, 0 free
 Contents:
0000000 R06: 0x0000005c R07: 0x850400d0 
R08: 0x00000000 R09: 0x00000020 R10: 0x00000000 R11: 0x00000129 
R12: 0x00000000 R13: 0x00000000 R14: 0x4005009a R15: 0x20000260 
R16: 0xc8828784 R17: 0x84212800 R18: 0xc0004c61 R19: 0x80005900 
R20: 0x80206000 R21: 0x84000304 R22: 0xd0410180 R23: 0x8c2005ac 
R24: 0x00000003 R25: 0x00000000 R26: 0x00000001 R27: 0x0000fc48 
R28: 0x001d0000 R29: 0x00000001 R30: 0x00136bb8 R31: 0x00000000 
MSR: 0x0000b030 CTR: 0x001331e0 Link:0x000308c8 SP:  0x01baba34
CCR: 0x42200020 XER: 0x00000000 PC:  0x000308cc
DSISR: 0x00000000 DAR: 0xffffffff K_MSR: 0x00001030
Stack Traceback:
Frame 01: sp = 0x01baba34, pc = 0x000308c8
Frame 02: sp = 0x01babac4, pc = 0x0002647c
Frame 03: sp = 0x01babad4, pc = 0x00026590
Frame 04: sp = 0x01babadc, pc = 0x00106fcc
Frame 05: sp = 0x01babafc, pc = 0x00026620
ROM NVRAM:
 0 available bytes, 0 used, 0 free

FPC1(host vty)# show syslog messages
[0+00:00:00.780 LOG: Info] Version 4.0R5 by tlim on 2000-08-10 04:45:54 UTC
[0+00:00:00.780 LOG: Info] On-board NVRAM contains diagnostic information.
[0+00:00:03.175 LOG: Info] PFEMAN: Established connection to Master
[Jan 30 21:53:05.804 LOG: Info] SNTPD: Initial time of day set.

Meaning

Sample output 1 and 2 show the stack trace from the microkernel crash. Save the output from the show nvram and show syslog commands so that you can send them to JTAC when you open a case.