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SET BPORT_MAU MODE
2-93
SET BPORT_MAU
MODE
Use the SET BPORT_MAU MODE command to:
■
Enable or disable a port MAU at the physical layer
■
Create primary and secondary Fast Ethernet ports
This command is most useful on a SwitchModule port that is physically or
logically configured to have more than one MAU. For example, use this
command to disable one of the two FDDI port MAUs on a SwitchModule FDDI
port.
When used on a port with only one MAU (such as a SwitchModule 10BASE-T
port), the SET BPORT_MAU MODE command has the same functionality as the
SET BRIDGE_PORT INTERFACE and SET BRIDGE_PORT STP BRIDGE_MODE
commands (disables the port).
After a reset, backplane ports are disabled by default. The only exception to this
default is if you save the enabled setting to NVRAM on the DMM by entering
the SAVE command. In this case, after a module reset the backplane port is
enabled.
To enable an Ethernet backplane port, enter the command SET BPORT_MAU
<slot.bport.mau> MODE ENABLE or SET PORT <slot.port> MODE ENABLE. After
the port is enabled, you can access the corresponding Ethernet backplane.
When used to create redundant links by configuring Fast Ethernet ports as
primary and secondary; if the primary port goes down, the secondary port takes
over and the link remains active.
You configure redundant pairs as follows:
■
Ports 1 and 2 are a redundant pair
■
Ports 3 and 4 are a redundant pair
When you configure a redundant pair of ports, management programs view the
two ports as one port with 2 MAUs. To configure redundant ports, use the SET
BPORT_MAU MODE command. When you define one port as the primary port,
the second port automatically becomes the backup port.
Variables PRIMARY and SECONDARY are available only to Fast Ethernet
SwitchModules.