HP Virtual Connect for c-Class BladeSystem Version 3.00 Setup and Installation Guide for HP Integrity BL8x0c i2 Series Server Blades

HP Virtual Connect Manager 81
accessing the physical NICs through the enclosure Onboard Administrator and the iLO interfaces on the
individual server blades.
Always establish control processes to ensure that a unique MAC address range is used in each Virtual
Connect domain in the environment. Reusing address ranges could result in server network outages
caused by multiple servers having the same MAC addresses.
If using Virtual Connect assigned MAC addresses, the following notes apply:
• Virtual Connect automatically reserves both a primary address and an iSCSI MAC address for use
by multifunction gigabit server adapters, such as the HP NC373m PCI Express Dual Port
Multifunction Gigabit server adapter. Only the primary MAC address is used by standard (not
multifunction) Ethernet devices.
• If a server blade is moved from a Virtual Connect managed enclosure to a non-Virtual Connect
enclosure, the local MAC addresses on that server blade are automatically returned to the original
factory defaults.
If a server blade is removed from a bay within a Virtual Connect domain and installed in another bay in
the same Virtual Connect domain or in a bay in a different domain, it is assigned the new set of
addresses appropriate for that server location.
Assigned MAC addresses
The MAC address range used by the Virtual connect domain must be unique within the environment. HP
provides a set of pre-defined ranges that are for use by Virtual Connect Manager and will not conflict
with server factory default MAC addresses.
When using the HP-defined MAC address ranges, ensure that each range is used only once within the
environment.