PRIMECLUSTER Installation and Administration Guide 4.1 (for Solaris(TM) Operating System)

6.6.1.5 Creating Takeover Network Resources

Normally to use a takeover network, use either "Gls" (Global Link Services) or "Ipaddress" as the resource type. If the availability of the takeover network is needed, use "Gls."

A takeover network must be set up if you are building a system like a client/server system that communicates with cluster services that operate in the cluster system.

Takeover networks allow communication to continue with the same network name from outside the cluster even if a cluster application that operates in the cluster system undergoes failover.

Takeover network types

The takeover network types are IP address takeover, MAC address takeover, and node name takeover.

• IP address takeover

  When switchover takes place, the defined IP address is taken over to the OPERATING node.

  This is the basic function of a takeover network.

• MAC address takeover

  The MAC address is also taken over to the OPERATING node.

• Node name takeover

  The node name* is also taken over to the OPERATING node.

  Use this type if a program that operates as a cluster application in the cluster node recognizes node names.

  * This is the same value as the host name that is obtained when uname -n is executed.

Files that are edited automatically by the GUI

If the GUI is used to execute the setup, certain files are edited as shown below.

The files differ according to the takeover network type.

# Start of lines added by FJSVwvucw - DO NOT DELETE OR CHANGE THIS LINE

# Mon Aug 05 21:01:43 JST 2002

<Specify information that is dependent on that particular file.  For example, for /etc/inet/hosts, the information becomes as follows:>

192.168.246.100 Ipaddress01

# End of lines added by FJSVwvucw - DO NOT DELETE OR CHANGE THIS LINE

• IP address takeover

  /etc/inet/hosts

  /usr/opt/reliant/etc/hvipalias

• Node name takeover

  /etc/inet/hosts

  /usr/opt/reliant/etc/hvipalias

  /etc/nodename

• MAC address takeover

  Lines are not created automatically. The lines must be specified beforehand.

• In node name takeover, the same node name is set to both the OPERATING node and the STANDBY node.
• All cluster nodes must have at least one network interface card so the card can be used by IPv4.
• IPv6 is not supported. If you want to use IPv6, use Gls.
• Although a PRIMECLUSTER "takeover network" and the "IP address takeover" function of GLS can be set up in the same cluster system, do not use them on the same interface. If the two are used on the same interface, connection using takeover IP addresses will be disenabled.
  For example, if you select hme1 as the interface to be used when you set up the PRIMECLUSTER "takeover network," do not set hme1 in the GLS environment settings (do not specify hme1 in the -t option of the "hanetconfig create" command).

---

6.6.1.5.1 Prerequisites

6.6.1.5.2 Setup Method