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1172 | C-Series Debugging and Diagnostics
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Inter-CPU timeouts
The CP monitors the health status of the other processors using heartbeat messaging exchange.
FTOS automatically saves critical information about the IPC failure to NVRAM. Such information
includes:
• Status counters on the internal Ethernet interface
• Traffic profile of the inter-CPU bus
• Kernel drops
• High CPU exception conditions
Upon the next boot, this information is uploaded to a file in the CRASH_LOG directory. Use the following
command sequence beginning in EXEC mode to capture this file for analysis by the Dell Force10 TAC.
In a dual RPM system, the two RPMs send synchronization messages via inter-RPM communication
(IRC). As described in the High Availability chapter, an RPM failover can be triggered by loss of the
heartbeat (similar to a keepalive message) between the two RPMs. FTOS reports this condition via syslog
messages, as follows:
FTOS automatically saves critical information, about the IRC failure, to NVRAM. Use the same three-step
procedure to capture this file for analysis by Dell Force10.
Step Task Command Mode
1 Display the directories in flash memory. The output
should include:
1 drwx 2048 Jan 01 1980 00:00:06
CRASH_LOG_DIR
dir flash:
EXEC
2 Change to the CRASH_LOG directory.
cd CRASH_LOG_DIR
EXEC
3 View any saved files in the CRASH_LOG directory.
The naming convention is:
sysinfo_RPMIDProcessorID _ timestamp
For example:
sysinfo_RPM1CP_20060616_013125
dir
EXEC Privilege
4 View the contents of the file.
show file flash://
CRASH_LOG_DIR/
[file_name]
EXEC Privilege
Message 4 RPM Failover Syslog Messages
20:29:07: %RPM1-S:CP %IRC-4-IRC_WARNLINKDN: Keepalive packet 7 to peer RPM is lost
20:29:07: %RPM1-S:CP %IRC-4-IRC_COMMDOWN: Link to peer RPM is down
%RPM1-S:CP %RAM-4-MISSING_HB: Heartbeat lost with peer RPM. Auto failover on heart beat lost.
%RPM1-S:CP %RAM-6-ELECTION_ROLE: RPM1 is transitioning to Primary RPM.