IBM BladeCenter Management Module Installation Manual page 30

v Management-module error: When this amber LED is lit, it indicates that an
error has been detected somewhere on the management module. When this
LED is lit, the system error LED on each of the BladeCenter system LED
panels is also lit.
v Ethernet link: When this green LED is lit, there is an active connection
through the port to the network.
v Ethernet activity: When this green LED is flashing, it indicates that there is
activity through the port over the network link.
Management module IP reset button: Do not press this button unless you
intend to erase your configured IP addresses for the management module and
lose connection with the remote management station, the I/O modules, and
the blade servers. If you press this button, you will need to reconfigure the
management module settings (see the information beginning with "Setting up
the remote connection" on page 26 for instructions).
Press this recessed button to reset the IP configuration of the management
module network interfaces (Ethernet 1, Ethernet 2, gateway address, and so on)
to the factory defaults and then restart the management module.
Use a straightened paper clip to press the button.
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BladeCenter Management Module: Installation Guide