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3 - 16 ONline Ethernet 10BASE-FB Module Installation and Operation Guide
Enabling Port Redundancy
You can enable port redundancy in one of the following ways:
❑ If you have network management, you can enable or disable main
port redundancy between any two ports on the 10BASE-FB Module.
❑ If you do not have management, you can use the dip switches on the
module to configure redundancy between ports 1 and 2 on the
module or ports 3 and 4.
For example, when you enable redundancy:
1. Port 1 becomes the primary link and port 2 is the redundant link.
2. If the primary link (port 1) fails, the redundant link (port 2) is engaged
automatically, thus preventing a network failure.
3. When you disable redundancy, each port works independently.
Note: Enabling port redundancy for two ports automatically
enables the ports, even if the ports were previously
disabled.
The redundancy status LEDs, located between the sets of port LEDs and the
port connectors on the 10BASE-FB Module, are:
❑ Off - When you disable redundancy (default setting)
❑ On - When you enable redundancy
To set redundancy between ports, use the following management
command:
SET PORT {
slot.port
} MODE REDUNDANT {
slot.port
}
To turn off redundancy between ports, use the MODE NON_REDUNDANT
option. Redundancy configurations are shown in Chapter 2, Designing and
Expanding the Network.