06-02-2015 08:11 AM - edited 03-08-2019 12:18 AM
Hi ,
I just acquired a Brand new Catalyst 4506-E L3 switch , to be implemented in a datacenter
I took out of the box, then plugged in the console and managed to access the line console on
the switch after a few minutes , it suddenly stopped and the switch stop working , hence it gives
me the following error :
UNHANDLED ROMMON EXCEPTION at PC=00321804
Vector=00000100 MSR=02020230 LR=0031e27c
MCSR=00000000
CISR0=00000000 CISR1=20000000
DDR_ERR_DETECT=80000004
I reboot the machine physically , tried also to do a reset but the error remains and the it does NOT take me
elsewhere .
Can you please help me on why I have this error ? and what to do to bypass it . I need to start configuring it as soon as
possible and iam stuck with this error message !!!! please help
06-02-2015 08:18 AM
Hi,
what is the version for your ROMmon? Do "set" in rommon to check it.
You might be hitting this bug CSCsw91043
06-02-2015 08:27 AM
Hi Norberto ,
I do not know what the my ROMmon version !
How do I access ROMmon ? the error message just got stuck into the prompt it does NOT allow me to type anything , what do i do man please help ?
06-02-2015 08:30 AM
Hi,
please try to hit ctrl+break a couple of times after restarting the device, you should get a prompt indicating that you're in Rommon mode.
06-02-2015 08:59 AM
Looks like a known bug there a few different versions looking around
As Norberto said you need to get into rommon , follow this guide it will help you get to rommon and further
http://www.cisco.com/c/en/us/support/docs/switches/catalyst-4000-series-switches/24061-149.html#image
similar bug
Symptom:
A memory allocation bug can cause a ROMMON crash when a certain combination of commands are invoked. The ROMMON crash manifests itself as an unhandled ROMMON exception and will appear on the console as follows:
UNHANDLED ROMMON EXCEPTION at PC=00306a20
Vector=00000e00 MSR=02029230 LR=003069fc
MCSR=00000000
CISR0=00000000 CISR1=00000000
DDR_ERR_DETECT=00000000
Conditions:
This bug is present in Rommon versions 12.2(31r)SGA5 and 12.2(31r)SGA6.
An UNHANDLED ROMMON EXCEPTION occurs while issuing a certain sequence of the ROMMON commands "dir slot0:", "dir bootflash:", and "dev". The crash is seen only while when 2 of these 3 commands are invoked. For example, invoking "dir bootflash:" (which works as expected), followed later by a "dir slot0:". The crash is not seen if the same command is invoked any number of times. It's only when 2 of these 3 commands are invoked during at the ROMMON command prompt that causes the crash. When this error occurs, the system resets and returns to the ROMMON prompt.
Workaround:
If this issue is ever encountered, the information generated by the 3 commands "dev", "dir slot0:", and "dir bootflash:" can still be obtained. The only stipulation is that you can only run one of these 3 commands in a single ROMMON command session. In other words, after the supervisor resets, you can then successfully invoke the command which causes the crash.
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