Managing Serviceguard Eighteenth Edition, September 2010

Deciding When and Where to Run and Halt Failover Packages .......................69
Failover Packages’ Switching Behavior..............................................................70
Failover Policy....................................................................................................72
Automatic Rotating Standby..............................................................................73
Failback Policy....................................................................................................75
Using Older Package Configuration Files.....................................................................78
Using the Event Monitoring Service ............................................................................79
Using the EMS HA Monitors........................................................................................79
How Packages Run.............................................................................................................80
What Makes a Package Run?.........................................................................................80
Before the Control Script Starts.....................................................................................82
During Run Script Execution........................................................................................82
Normal and Abnormal Exits from the Run Script........................................................84
Service Startup with cmrunserv..................................................................................84
While Services are Running..........................................................................................85
When a Service, Subnet, or Monitored Resource Fails, or a Dependency is Not
Met.................................................................................................................................85
When a Package is Halted with a Command................................................................86
During Halt Script Execution........................................................................................86
Normal and Abnormal Exits from the Halt Script........................................................87
Package Control Script Error and Exit Conditions..................................................88
How the Network Manager Works ...................................................................................89
Stationary and Relocatable IP Addresses .....................................................................90
Types of IP Addresses..............................................................................................91
Adding and Deleting Relocatable IP Addresses ..........................................................91
Load Sharing ...........................................................................................................92
Monitoring LAN Interfaces and Detecting Failure: Link Level....................................92
Local Switching .......................................................................................................93
Switching Back to Primary LAN Interfaces after Local Switching..........................96
Remote Switching ...................................................................................................97
Address Resolution Messages after Switching on the Same Subnet.......................98
Monitoring LAN Interfaces and Detecting Failure: IP Level........................................98
Reasons To Use IP Monitoring.................................................................................98
How the IP Monitor Works......................................................................................99
Failure and Recovery Detection Times..................................................................101
Constraints and Limitations...................................................................................101
Reporting Link-Level and IP-Level Failures...............................................................101
Example 1: If Local Switching is Configured.........................................................102
Example 2: If There Is No Local Switching............................................................102
Automatic Port Aggregation.......................................................................................103
VLAN Configurations.................................................................................................104
What is VLAN?......................................................................................................105
Support for HP-UX VLAN.....................................................................................105
Configuration Restrictions.....................................................................................105
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