Manual core dump generation - Junos

This article provides information on how to manually generate core dumps on various Ex/M/MX/T-series devices.

Manually generate core dumps on various M/MX/T-series devices.

Generate a daemon Core Dump

user@Router> request system core-dump <process name>
or

root@Router% kill -6 <PID>

Generate a Live daemon Core Dump without Restarting

root@Router% gcore -s -c /var/tmp/<process_name.core.pid> <pid>

Generate a Kernel Core Dump (RE will reboot)

root@Router% sysctl -w debug.kdb.panic=1

Or, to shock it:

set system debugger-on-break

then 
router>edit
router# 
ctrl ]

telnet>send brk
db> panic

Generate a Live Kernel Core Dump without Reboot

root@Router% sysctl -w kern.live_core_dump=1

Note: Do not forget to reverse it.

Generate a FPC/IQ2/MS-PIC Core Dump (CPU board will reboot; that is, it will get shocked)

FPC0(Router vty)# set parser security 10
Security level set to 10

FPC0(Router vty)# test panic

Generate a FPC/PFE/IQ2/MS Core Dump without Reboot (service PIC might restart)

FPC0(Router vty)# write coredump

Manual core dump generation – Junos