Core Issue
The %RSP-3-ERROR MD error message indicates a parity error has occurred. The accompanying messages indicate whether the bad parity is found on the Route Switch Processor (RSP) or on another card.
Resolution
If a Cisco 7500 series router produces the %RSP-3-ERROR MD error message, evaluate the accompanying error messages, as shown in the following examples:
- In the following example, Static Random Access Memory (SRAM), which is on the RSP, is producing the parity error.
%RSP-3-ERROR MD error 0000008000008000
%RSP-3-ERROR SRAM parity error (bytes 07) 20
%RSP-3-ERROR MEMD parity error condition
The logs show an MD error on the RSP that indicates that the RSP pulled data with bad parity from SRAM and sent it out over the CyBus.
- In the following example, CyBus 1 is the source of the parity error, indicating that a card on CyBus 1 is the cause:
%RSP-3-ERROR MD error 0080008000030003
%RSP-3-ERROR Cybus1 parity error (bytes 07) 0F
%RSP-3-ERROR bus command write 4bytes (0xE)
- If the parity error message indicates one of the following, the RSP is the source of the parity error:
MC control parity error
RP parity error
SRAM parity error
QA parity error
- If the parity error message indicates one of the following, an interface processor on the corresponding CyBus is the source of the parity error:
Cybus0 parity error
Cybus1 parity error
As with all parity errors, a one-time occurrence may indicate only a transient issue. Monitor for a repeat occurrence.
If multiple parity errors occur, a hardware replacement may be necessary.
For more information on troubleshooting parity errors, refer to Processor Memory Parity Errors (PMPEs).
