3 - 16 ONline Ethernet 10BASE-FB Module Installati on a n d 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 tw o ports on the 10BASE-FB Module.
❑If you do not have management, you can use the dip switches o n the
module to configure redundancy be tween ports 1 and 2 on the
module or ports 3 and 4.
For example, when you enable redu ndancy:
1. Port 1 becomes the primary link and port 2 is the red undant 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 automatic al ly
enables the ports, even if the ports were previously
disabled.
The redundancy status LEDs, located be tween 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 po rts, use the MODE NON_REDUNDANT
option. Redundancy configurations are shown in Chapter 2, Designing and
Expanding the Network.