The WS-C4948-10GE fixed configuration switch models may reset due to a multibit ECC error on the SDRAM memory.
Cisco has found that the above fixed configuration models have a potential to experience SDRAM degradation. This could result in switch reloads. In advanced circumstances when SDRAM has degraded extensively, the switch could reload and hang on reboot. Factors which influence the extent of SDRAM degradation are the length of time the switch has been in operation along with network traffic patterns that affect SDRAM access. The extent of degradation is not easily quantifiable.
The degradation of SDRAM is a slow process over an extended period of time. Marginal SDRAM degradation can be noted when a switch reloads unexpectedly and leaves behind a multibit-ecc error signature in the crashdump file. See CSCsf14520 for detailed information. Severe SDRAM degradation can be noted when the switch fails to boot and hangs in the process of loading IOS. In such scenarios, while connected to console, reset the unit and if the system hangs after several hash prompts "###########" the problem will be identified.
Only WS-C4948-10GE fixed configuration switches with the Serial numbers below and Hardware Revision numbers are vulnerable. Please follow the following steps to identify if your switches are affected:
STEP 1) Check the WS-C4948-10GE Serial Number:
(where x at any location in the Serial Number can represent any letter or number)
STEP 2) If the Serial Number does not match the values above, then the WS-C4948-10GE is not affected. If the
STEP 3) Check the WS-C4948-10GE to see if it has a vulnerable Hardware Revision number:
STEP 4) If both the Serial Number and Hardware Revision number match the values above, please use the standard RMA process to order replacement parts. After receiving the replacement switch please return affected unit to Cisco.
Units that do not meet both the Serial number and Hardware Revision detailed above are not vulnerable.
Note: When replacing units which are affected by this field notice with upgrade units, please keep the original power-supplies, 10GE-X2 modules, and power cables so that they can be used in the upgrade units.
To follow the bug ID link below and see detailed bug information, you must be a registered customer and you must be logged in.
How To Identify Hardware Levels
To identify the Serial Number and Hardware Revision of the installed switches, use the
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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