HP 1.10GB Virtual Connect Ethernet Module for c-Class BladeSystem - Manual (Page 49)

HP BladeSystem c-Class enclosures 49
HP BladeSystem c-Class enclosures
Enclosure serial numbers
The enclosure serial number is used by the Virtual Connect Manager to associate a Virtual Connect domain
with a particular enclosure. The enclosure serial number can be altered for maintenance purposes, such as
replacement of the enclosure midplane. For more information, see SET ENCLOSURE SERIAL_NUMBER in
the HP BladeSystem Onboard Administrator Command Line Interface User Guide on the Installing tab of the
HP BladeSystem Technical Resources website ( http://www.hp.com/go/bladesystem/documentation ).
• Enclosure serial numbers are unique as shipped from the factory, and must remain unique for proper
Virtual Connect Manager operation. Use care when altering the enclosure serial number to ensure that
serial numbers are unique within the management network.
• After an enclosure is imported into a domain, do not change the serial number. The enclosure must have
the enclosure serial number that was present when imported initially. It cannot be replaced with an
enclosure that has a different serial number.
• In the event of an enclosure failure, the replacement enclosure must have the serial number set to that of
the failed enclosure before it is placed into the VC domain.
• If you are moving interconnect modules, OA modules, and server blades from one enclosure to another,
you must first save the VC configuration, then move the OAs to the new enclosure and power on the
OAs. After the OAs are powered up and you can log in, then place the interconnect modules in the
enclosure and power them on. After you can log in to VCM, restore your configuration. After the
configuration is restored, move the server blades to the new enclosure. If the server blades are already
in the new enclosure, the servers are required to be powered off when the VC configuration is restored
in the new enclosure.
In an existing VC domain, if the enclosure serial number is changed from the OA with the set enclosure
serial-number command, HP recommends that all the VC Ethernet modules be reset through the OA so that
the new enclosure number is propagated to all the modules in the enclosure. Do not attempt to replicate
domains within the environment using the save/restore mechanisms. This can create serious errors within the
replicated domain and the original domain.
Using multiple enclosures
Multiple enclosure support enables up to four c7000 enclosures to be managed within a single Virtual
Connect domain for a total of 128 servers, if double-dense support is enabled while using the Domain Setup
Wizard. There are 16 half-height or 8 full-height server bays in a c7000 enclosure. A combination of
full-height and half-height servers can be used in the same enclosure.
Multiple enclosure domains are not supported on c3000 enclosures. The VC-Enet or FlexFabric modules use
stacking cables between enclosures so that network traffic can be routed from any server Ethernet port to any
uplink within the VC domain. Since FC does not support stacking, the VC-FC or FlexFabric module FC uplinks
on the same bay of all enclosures must be connected to the same FC switch to enable profile mobility.
The management interfaces for all enclosure Onboard Administrators and VC modules within the same VC
domain must be on the same lightly loaded subnet and highly reliable network. Overloads or loss of