How to check the signature of the core dump.
The following command displays the vital information about the crash. You can verify the time of crash, Junos code that was running, and the reason for the core-dump.
show_crash_info <platform>
Valid platforms: adpc/atlas/csbr/fpc160/gfpc/ggsnu/gsib/iq2/ixp425/mint/nic/phoenix/pfpc-pq2/rfeb/rfpc/sbr/scb/sfm/sfpc/sfpc2/spc/stfpc
For example:
/volume/buildtools/bin/jdebug core-ADPC1.gz.core.3 [ (gdb) source /volume/build/junos/11.2/release/11.2R1.10/src/pfe/tools/gdb/pfe_ukern.gdb < Make sure you have the respective source file for the required Junos version. (gdb) show_crash_info adpc Printing adpc_err_buf System Exception: Vector/Code 0x00100, Signal 11 Event occurred at: Oct 25 02:22:25.798840 < The time when the core-dump occurred Juniper Embedded Microkernel Version 11.2R1.10 < Junos code that was running Built by builder on 2011-07-29 07:47:05 UTC Copyright (C) 1998-2011, Juniper Networks, Inc. All rights reserved. Reason string: "Critical Exception" Context: Thread (TTP Receive) DDR SDRAM Error: Multi-bit ECC error < This is an ECC error;so it is a hardware issue.
Source path to be used:
/volume/build/junos/<junos-throttle>/<release/service>/<junos-release>/src/pfe/tools/gdb/pfe_ukern.gdb