Configuring networks

You can use the System Management Interface Tool (SMIT) to configure IP-based networks to use PowerHA® SystemMirror®.

About this task

To configure networks, complete the following steps:

From the command line, enter smit sysmirror
When initially setting up the cluster, if you are using the custom configuration path, you can use the Networks menu under Initial Cluster Configuration (Custom > Cluster Nodes and Networks to add networks to the new cluster configuration.
After initial configuration of the cluster is complete and you want to add additional networks to an existing cluster, you can use the menus found directly under Cluster Nodes and Networks > Manage Networks and Network Interfaces > Networks from the main PowerHA SystemMirror SMIT menu.
Select the type of network to configure.

Enter the information as follows:

Table 1. Network fields
Field	Value
Network Name	If you do not enter a name, PowerHA SystemMirror will give the network a default network name made up of the type of network with a number appended (for example, `net_ether_01`). If you change the name for this network, use no more than 128 alphanumeric characters and underscores.
Network Type	This field is filled in depending on the type of network you selected.
Netmask(IPv4)/Prefix Length(IPv6)	For the configuration of the IP version 4 service interface, enter the network mask for the address. For the configuration of the IP version 6 service interface, enter the prefix length for the address. This field is not a required field. If you do not enter a value, the prefix length or netmask of the underlying network is used. If a prefix length value or netmask value is specified, it is checked for compatibility with the underlying network.
Instability Threshold	The network is considered unstable when more than this number of state changes are detected within the Instability Period.
Instability Period	Used with the Instability Threshold to determine when a network is unstable. The network is considered unstable when more than the Threshold number of state changes occur within this time period. If the network was unstable, and this period of time passes without any new state changes, the network is then considered stable. Period is specified in seconds.