PRIMECLUSTER Global Link Services Configuration and Administration Guide: Redundant Line Control Function 4.1 (for Solaris(TM) Operating System)

5.1.1.1.1 Fast switching mode

With userApplication startup, the takeover virtual interface (sha0:65) over operating node will be activated, enabling communication using the takeover virtual IP address.

When operating, Fast switching mode uses the Redundant Line Control function to communicate with the remote system.

Note that the virtual interface (such as sha0) is inactive just after GLS starts up. The virtual interface will be active after the first startup of userApplication. Once it becomes active, regardless of stopping or restarting userApplication, it remains to be active until the system stops.

When communicating with the other network using the virtual interface of Fast switching mode, or activating the virtual interface prior to userApplication startup, use hanetparam command to set the activation timing.
For detail, refer to "7.6 hanetparam Command".
For description of setup, refer to "D.1 Changing Methods of Activating and Inactivating Interface".

Figure 5.2 shows behavior of Fast switching mode after starting up

[Figure 5.2 Startup behavior of Fast switching mode]