September 9, 2008
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Revision Date Comment 1.0 09-SEP-2008 Initial Public Release
Products Affected M9500 - DS-X9530-SF1-K9 MDS9000 - DS-X9530-SF2-K9
In rare cases, MDS supervisor modules running the noted versions of SAN-OS can reboot when running the commands listed below:
Command First SAN-OS Fixed SAN-OS
show tech-support details
show tech-support cfs
show tech-support cfs name
show cfs internal message-context name
show tech-support internal module x
show system internal fcfwd idxmap interface-to-port
show system internal fcfwd idxmap port-to-interface
Care should be taken when running these commands on any affected version of SAN-OS. In rare situations, running these commands back to back in a dual supervisor configuration, the switch may reload. A single supervisor configuration is significantly more risky due to the inability to failover.
Switch reloads due to execution of these commands are a rare occurrence, but may occur. The likelihood of a system reload will increase the more the commands are executed.
show tech-supportcommand is a compilation of other commands. Among those commands are the commands that include
show system internal fcfwd...commands. The root cause of the problem is related to the "fcfwd" show commands.
show tech-support detailsand show tech-support are the same command for SAN-OS 3.1(1) and higher.
The MDS may reload when issuing one of the aforementioned commands. Care should be taken when running these commands on any affected version of SAN-OS.
The user should also avoid running any of the affected commands. If a
show tech-supportoutput is required, open a case with the Cisco TAC. The TAC has a script that can be run which will avoid the "fcfwd" commands.
The issue with the CFS and related commands is resolved in SAN-OS 3.2(3a) and higher.
The issue with the "fcfwd" and related commands is resolved in SAN-OS 3.3(1c) and higher.
SAN-OS 3.2(3a) and 3.3(1c) are available through the Software Downloads section of http://cco.cisco.com. Check with your provider for an approved version of SAN-OS for your environment.
To follow the bug ID link below and see detailed bug information, you must be a registered customer and you must be logged in.
DDTS Description CSCsi87843 (registered customers only) MDS SAN-OS 3.1(2b) CFS cores due to double-free/ memory corruption. CSCso63759 (registered customers only) Switch reboots while running cmd "sho sys int fcfwd idxmap"
For More Information
If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:
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