HP Cisco MDS 9020 Cisco MDS 9000 Family Fabric Manager Configuration Guide, Re - Page 1309

Chapter 70 Monitoring System Processes and Logs Default Settings Send documentation comments to [email protected] • Sends Call Home and system messages and exception logs as soon as it detects a failure. • Shuts down the failing module or component (such as an interface). • Isolates failed ports from further testing. • Reports the failure to the appropriate software component. • Switches to the standby supervisor module, if an error is detected on the active supervisor module and a standby supervisor module exists in the Cisco MDS switch. After the switchover, the new active supervisor module restarts the active supervisor tests. • Reloads the switch if a standby supervisor module does not exist in the switch. • Provides CLI support to view, test, and obtain test run statistics or change the system health test configuration on the switch. • Performs tests to focus on the problem area. Each module is configured to run the test relevant to that module. You can change the default parameters of the test in each module as required. Performing Internal Loopback Tests You can run manual loopback tests to identify hardware errors in the data path in the switching or services modules, and the control path in the supervisor modules. Internal loopback tests send and receive FC2 frames to/from the same ports and provide the round trip time taken in microseconds. These tests are available for Fibre Channel, IPS, and iSCSI interfaces. Choose Interface > Diagnostics > Internal to perform an internal loopback test from Device Manager. Performing External Loopback Tests You can run manual loopback tests to identify hardware errors in the data path in the switching or services modules, and the control path in the supervisor modules. External loopback tests send and receive FC2 frames to/from the same port or between two ports. You need to connect a cable (or a plug) to loop the Rx port to the Tx port before running the test. If you are testing to/from the same port, you need a special loop cable. If you are testing to/from different ports, you can use a regular cable. This test is only available for Fibre Channel interfaces. Choose Interface > Diagnostics > External to perform an external loopback test from Device Manager. Default Settings Table 70-1 lists the default system health and log settings. Table 70-1 Default System Health and Log Settings Parameters Kernel core generation System health Loopback frequency Failure action Default One module. Enabled. 5 seconds. Enabled. OL-16184-01, Cisco MDS SAN-OS Release 3.x Cisco MDS 9000 Family CLI Configuration Guide 70-7