It is possible to define several IP addresses (logical virtual interfaces) on a single virtual interface. They are called logical virtual interfaces in this document. Using this function, various IP addresses can be used for each application.
Note
The virtual IP address of same subnet must be assigned to the multiple virtual interfaces.
Figure 2.26 Logical virtual interfaces being defined shows an example of defining two IP addresses (logical virtual interface) on a single virtual interface sha0. Configure the IP address of the same subnet to sha0, sha0:2, sha0:3.
Figure 2.26 Logical virtual interfaces being defined
The total number of interfaces can be created as a logical virtual interface is 63 (from 2 to 64). The logical virtual interfaces greater than 65 will be used as takeover virtual interface upon Cluster configuration.
For GS linkage mode in a cluster configuration, you can take over a virtual IP address which belongs to the same network between clusters by using the logical virtual interface.
Figure 2.27 Logical virtual interfaces being defined (GS linkage mode in a cluster configuration)
Note
This function is only available for Fast switching mode, Virtual NIC mode, and GS linkage mode.
For NIC switching mode, if using physical interface sharing function, it can process (a process of allocating multiple IP addresses to one physical interface) equally as this function.
For Virtual NIC mode, create the definition file of the operating system (/etc/sysconfig/network-scripts/ifcfg-sha0:2) for setting, instead of using the GLS command.
