Mike Nipp has wondered which syslog message to use to reliably detect router reload under all circumstances:
The problem I had with the SYS-5-RESTART message is I don't think you will get one if the power is suddenly pulled from the router. It does do a SNMP-5-COLDSTART and SYS-6-BOOTTIME on boot up.
I did an actual power-cycle test of a router (we can do that remotely in our labs, so I didn't have to touch the box :) and the SYS-5-RESTART message is reliably generated at every startup, be it from the power cycle or the reload command (I was not able to provoke an on-demand crash ;).
This article is part of You've asked for it series.
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Perhaps test crash command could be accurate for your tests if it haven't his own syslog messages.
ReplyDeleteHave you tried the core dump?
ReplyDeletehttp://www.cisco.com/warp/public/112/appA.htm
I think what fropert was referencing was the undocumented "test crash" IOS cli command...
ReplyDeleteT1Router#test crash
WARNING: Command selections marked with '(crash router)' will crash
router when issued. However a selection 'C' will need to
be issued IMMEDIATELY before these selections to enable them.
Type the number for the selected crash:
--------------------------------------
1 (crash router) Bus Error, due to invalid address access
2 (crash router) Bus Error, due to parity error in Main memory
3 (crash router) Bus Error, due to parity error in I/O memory
4 (crash router) Address Error, due to fetching code from odd address
5 (crash router) Jump to zero
6 (crash router) Software forced crash
7 (crash router) Illegal read of address zero
8 (crash router) Divide by zero
9 (crash router) Corrupt memory
C Enable crash router selection marked with (crash router)
R (crash router) User enter read bus error address
U (crash router) User enter write bus error address
W (crash router) Software watchdog timeout (*** Watch Dog Timeout ***)
w (crash router) Process watchdog timeout (SYS-2-WATCHDOG)
d Disable crashinfo collection
e Enable crashinfo collection
i Display contents of current crashinfo flash file
m Write crashinfo on crashinfo RAM
n Change crashinfo flash file name
q Exit crash menu
s Save crashinfo to current crashinfo flash file
c Close current crashinfo flash file
t Write crashinfo on console TTY
x Exit crash menu
?
T1Router uptime is 31 minutes
System returned to ROM by error - a Software forced crash, PC 0x80204EEC at 04:46:03 UTC Thu Apr 28 2005
Another option is to use the @reboot cron specification with a cron timer EEM policy.
ReplyDelete