Managing HP Serviceguard for Linux, Tenth Edition, September 2012

Bonding of LAN Interfaces .................................................................................71
Bonding for Load Balancing................................................................................74
Monitoring LAN Interfaces and Detecting Failure: Link Level.....................................75
Monitoring LAN Interfaces and Detecting Failure: IP Level.......................................75
Reasons To Use IP Monitoring.........................................................................76
How the IP Monitor Works.............................................................................76
Failure and Recovery Detection Times..........................................................78
Constraints and Limitations.............................................................................78
Reporting Link-Level and IP-Level Failures................................................................79
Package Switching and Relocatable IP Addresses...................................................79
Address Resolution Messages after Switching on the Same Subnet ..........................80
VLAN Configurations.........................................................................................80
What is VLAN?............................................................................................80
Support for Linux VLAN.................................................................................80
Configuration Restrictions...............................................................................80
Additional Heartbeat Requirements.................................................................81
Volume Managers for Data Storage..........................................................................81
Storage on Arrays..............................................................................................82
Monitoring Disks...............................................................................................83
More Information on LVM...................................................................................83
About Persistent Reservations....................................................................................83
Rules and Limitations..........................................................................................84
How Persistent Reservations Work........................................................................85
Responses to Failures .............................................................................................86
Reboot When a Node Fails ...............................................................................86
What Happens when a Node Times Out.........................................................87
Example .................................................................................................87
Responses to Hardware Failures ..........................................................................88
Responses to Package and Service Failures ..........................................................89
Responses to Package and Generic Resources Failures.......................................89
Service Restarts ............................................................................................90
Network Communication Failure ....................................................................90
4 Planning and Documenting an HA Cluster ...............................................................................91
General Planning ..................................................................................................91
Serviceguard Memory Requirements.....................................................................92
Planning for Expansion ......................................................................................92
Hardware Planning ................................................................................................92
SPU Information ................................................................................................92
LAN Information ...............................................................................................93
Shared Storage.................................................................................................93
FibreChannel................................................................................................93
Multipath for Storage ...................................................................................94
Disk I/O Information .........................................................................................94
Hardware Configuration Worksheet ....................................................................95
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