Online System Health Management; About Online System Health Management - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

Online System Health Management

S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Online System Health Management
The Online Health Management System (system health) is a hardware fault detection and recovery
feature. It ensures the general health of switching, services, and supervisor modules in any switch in the
Cisco MDS 9000 Family.
This section includes the following topics:
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About Online System Health Management

The Online Health Management System (OHMS) is a hardware fault detection and recovery feature. It
runs on all Cisco MDS switching, services, and supervisor modules and ensures the general health of
any switch in the Cisco MDS 9000 Family. The OHMS monitors system hardware in the following ways:
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The OHMS application launches a daemon process in all modules and runs multiple tests on each module
to test individual module components. The tests run at preconfigured intervals, cover all major fault
points, and isolate any failing component in the MDS switch. The OHMS running on the active
supervisor maintains control over all other OHMS components running on all other modules in the
switch.
On detecting a fault, the system health application attempts the following recovery actions:
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Cisco MDS 9000 Family CLI Configuration Guide
59-12
dst_port is 6666
dump_dev_name is eth1
dst_mac_addr is 00:00:0C:07:AC:01
About Online System Health Management, page 59-12
System Health Initiation, page 59-13
Loopback Test Configuration Frequency, page 59-13
Loopback Test Configuration Frame Length, page 59-14
Hardware Failure Action, page 59-14
Test Run Requirements, page 59-15
Tests for a Specified Module, page 59-15
Clearing Previous Error Reports, page 59-16
Performing Internal Loopback Tests, page 59-17
Performing External Loopback Tests, page 59-18
Performing Serdes Loopbacks, page 59-19
Interpreting the Current Status, page 59-19
Displaying System Health, page 59-20
The OHMS component running on the active supervisor maintains control over all other OHMS
components running on the other modules in the switch.
The system health application running in the standby supervisor module only monitors the standby
supervisor module—if that module is available in the HA standby mode. See the
Characteristics" section on page
Performs additional testing to isolate the faulty component
Chapter 59
9-2.
Monitoring System Processes and Logs
"HA Switchover
OL-16184-01, Cisco MDS SAN-OS Release 3.x