Notes on setting a configuration:
The minimum and maximum number of virtual and logical virtual interface can be defined is 1 to 64 in total.
The number of physical interfaces can be used for redundancy on a single virtual interface is within 1 to 8 for Fast switching mode and GS linkage mode. For NIC switching mode, the range is within 1 to 2.
The number of logical virtual interfaces that can be defined to a single logical virtual interface is within 1 to 63.
Notes on the operation:
Do not operate physical interfaces that a virtual interface bundles with an ifconfig command.
On the system that makes the transfer route redundant by the Redundant line control function, the user must not execute the /etc/init.d/network script.
Notes on upper applications:
When using TCP in a working application, the data lost when an error occurred in a transfer route is guaranteed by resending from TCP and reaches the other system in the end. Therefore, TCP connection is not disconnected and there is no error in communication. However, it is necessary to set a timer value longer than the time to finish disconnecting/switching a transfer route when an application monitors a response by such as a timer. When TCP connection is disconnected by the reason such as not possible to change a timer value, reestablish the TCP connection and recover the communication.
The data lost at the time of an error in a transfer route is not guaranteed when a working application uses the UDP. It is necessary to execute a recovery process such as sending the data by the application itself.
When using NTP as an upper application, it is necessary to activate an IP address that a Redundant Line Control Function controls before activating an NTP daemon. No special operation is required when activating a system because a Redundant Line Control Function is activated before an NTP daemon. However, when manually activated an IP address with an operation command or when running cluster operation, reactivate an NTP daemon after an IP address is activated. In addition, when using NTP on GLS, a NTP daemon has to be defined to be able to communicate using a logical IP address.
