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Partition-related information (such as merge timeout definition)
Chassis information for serial and UUID checksum
Scalability port information
The BMC firmware discovers scalable systems automatically, to check for
changes at the scalability port connections, adding new systems and any
changes at any existing system in this complex. This is all done by the attached
scalability cables. The BMC reads all the Complex Descriptors and keeps the
information consistent in all the BMC.
Note: The BMC in each system discovers and keeps consistent complex and
partition information of all nodes in a complex. This allows the RSA2 in any
system in a complex to manage the all of the partitioning.
The BMC monitors the Complex Descriptors information in the complex. A
change in the Complex Descriptor information, which always holds information
about the state of all systems and partitions, presents a red alert in the RSA II
Scalability Management menu Web interface if an error occurs. It also indicates
static errors, which is a problem of a particular system, or the cabling at a
scalability port, shown in Figure 4-24 on page 224.
Note: In the case of any unexpected behavior, which can result in an
unexpected reboot of the whole partition, but can be recovered after a reboot,
it is not reported in the RSA II Scalability Management menu. There you can
see static errors only, that affect any system in a partition or the complex.
To isolate the failure, we recommend that you check the system event
information in the RSA II Web interface on all connected nodes.
See Figure 4-31 on page 238.
4.4 Prerequisites to create a multinode complex
This section describes what to consider before you can create a multinode
complex. Before you configure a scalability partition, be aware of the following
prerequisites:
A scalable system must have a scalability hardware enabler key, also known
as the ScaleXpander chip, installed into the x3850 M2 and x3950 M2. This
provides the capability to scale the system, or add to an existing multinode
Chapter 4. Multinode hardware configurations
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