Hitachi Compute Blade 2000, User Manual

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MAC address in the Compute Blade 2000
LAN controllers available for N+M cold standby have the following two media access control
(MAC) addresses:

Default Physical MAC address
The Default Physical MAC address is unique to LAN controllers and unchangeable.
Typical LAN controllers have this type of MAC address.

Optional Physical MAC address
The Optional Physical MAC address is a MAC address added to a LAN controller and
changeable. This can be available for Hitachi Compute Blade, and remains the same
address as long as a LAN controller is installed in the same slot even if you changed the
LAN controller.
To keep the LAN connection with Compute Blade 2000, assign the Optional Physical MAC
address, which is assigned to the LAN controller on an active partition, to the LAN controller
on the standby partition at switching partitions with N+M cold standby. MAC address-
depending software functions, such as Persistent Binding, can be available after switching
partitions because the MAC address viewed from an OS is not changed after switching
partitions with N+ M cold standby.
Either Default Physical MAC address or Optional Physical MAC address is available. Both of
them cannot be used at the same time. For information about how to select a MAC address,
see “PR Command” in Chapter 6.

Optional Physical MAC address can be available for
Hitachi Compute Blade. If you install the LAN
controller on another unit, the Optional Physical MAC
address will not be used.

When an Optional Physical MAC address is initialized
after switching servers, the Optional Physical MAC
address may overlap. Make sure that the MAC
address does not overlap when initializing the MAC
address.

You need to set “inline” as a Smart Configure method
when assigning an Optional Physical MAC address to
a LAN controller. With the inline method, make sure to
have management modules, BMC, and EFI firmware
support the inline method.

If a LAN controller does not support Optional Physical
MAC address, you cannot operate the LAN controller
using Optional Physical MAC address.