I have seen that, but not related to adding an IP, and not on a 2501. It
happened after I upgraded the memory in a 7200.
I ended up having to remove the new memory, put the old memory back in,
upgrade the IOS, then reinstall the new memory.
IOS Version 12.1(4), RELEASE SOFTWARE (fc1) fixed it.
Chris Davis
Site Engineer
ComputerJobs.com
Upgrade Your Future
http://www.computerjobs.com
-----Original Message-----
From: mgraves@cvvt.org [mailto:mgraves@cvvt.org]
Sent: Wednesday, April 25, 2001 10:46 AM
To: cisco-nsp@puck.nether.net; nanog@merit.edu
Subject: [nsp] Trapped in a loop
For NANOG, non-operational content
One of my instructors has a Cisco 2501 running 12.0(9) that is possessed.
A) Have you ever seen this before
B) Do you know how to stop it.
A student added an IP address to S1 and the router went postal.
>From the terminal session:
Nested r4k_return_to_monitor call (4165 times)
-Traceback= 0 31B985C
Nested r4k_return_to_monitor call (4166 times)
-Traceback= 0 31B985C
Nested r4k_return_to_monitor call (4167 times)
-Traceback= 0 31B985C
Nested r4k_return_to_monitor call (4168 times)
-Traceback= 0 31B985C
Nested r4k_return_to_monitor call (4169 times)
-Traceback= 0 31B985C
Nested r4k_return_to_monitor call (4170 times)
-Traceback= 0 31B985C
The counter increments until you reboot, then starts counting again.
Cisco lists the following in the IOS notes:
CSCdr75021
As a Cisco router boots Cisco IOS, it attempts to read the CPU EEPROM into a
data structure that is not big enough, causing the router to reload. The
crash dump typically looks like this:
Nested r4k_return_to_monitor call (2 times) -Traceback= 0 6038EC00 6038EB14
6038D524 603768D4 6042C86C 6042BF88 6043866C 604379CC 6042EB18 Nested
r4k_return_to_monitor call (3 times) *** System received a Bus Error
exception *** signal= 0xa, code= 0x4008, context= 0x61869b70 PC =
0x60431200, Cause = 0x4020, Status Reg = 0x34008002 rommon 2 >
There is no workaround.
I would appreciate any help
Mike
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