Managing Serviceguard Sixteenth Edition, March 2009

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....................................................................................................76
Using Older Package Configuration Files.....................................................................79
Using the Event Monitoring Service ............................................................................80
Using the EMS HA Monitors........................................................................................80
How Packages Run.............................................................................................................81
What Makes a Package Run?.........................................................................................81
Before the Control Script Starts.....................................................................................83
During Run Script Execution........................................................................................83
Normal and Abnormal Exits from the Run Script........................................................85
Service Startup with cmrunserv..................................................................................85
While Services are Running..........................................................................................86
When a Service, Subnet, or Monitored Resource Fails, or a Dependency is Not
Met.................................................................................................................................86
When a Package is Halted with a Command................................................................87
During Halt Script Execution........................................................................................87
Normal and Abnormal Exits from the Halt Script........................................................88
Package Control Script Error and Exit Conditions..................................................89
How the Network Manager Works ...................................................................................90
Stationary and Relocatable IP Addresses .....................................................................91
Types of IP Addresses..............................................................................................92
Adding and Deleting Relocatable IP Addresses ..........................................................92
Load Sharing ...........................................................................................................93
Monitoring LAN Interfaces and Detecting Failure: Link Level....................................93
Local Switching .......................................................................................................94
Switching Back to Primary LAN Interfaces after Local Switching..........................97
Remote Switching ...................................................................................................98
Address Resolution Messages after Switching on the Same Subnet.......................99
Monitoring LAN Interfaces and Detecting Failure: IP Level........................................99
Reasons To Use IP Monitoring.................................................................................99
How the IP Monitor Works....................................................................................100
Constraints and Limitations...................................................................................102
Reporting Link-Level and IP-Level Failures...............................................................102
Example 1: If Local Switching is Configured.........................................................103
Example 2: If There Is No Local Switching............................................................103
Automatic Port Aggregation.......................................................................................104
VLAN Configurations.................................................................................................105
What is VLAN?......................................................................................................106
Support for HP-UX VLAN.....................................................................................106
Configuration Restrictions.....................................................................................106
Additional Heartbeat Requirements......................................................................107
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