Owner's Manual

I/O Fabric Management 401
CMC creates entries in both the hardware log and CMC logs for invalid
hardware configurations.
For example:
• An Ethernet MC connected to a Fibre Channel IOM is an invalid
configuration. However, an Ethernet MC connected to both an Ethernet
switch and an Ethernet pass-through IOM installed in the same IOM
group is a valid connection.
• A Fibre Channel pass-through IOM and a fibre channel switch IOM in
slots B1 and B2 is a valid configuration if the first MCs on all of the servers
are also fibre channel. In this case, CMC powers-on the IOMs and the
servers. However, certain fibre channel redundancy software may not
support this configuration; not all valid configurations are necessarily
supported configurations.
NOTE: Fabric verification for server IOMs and MCs is performed only when the
chassis is powered on. When the chassis is on standby power, the iDRACs on the
server modules remain powered off and thus are unable to report the server's MC
fabric type. The MC fabric type may not be reported in the CMC user interface until
the iDRAC on the server is powered on. Additionally, if the chassis is powered on,
fabric verification is performed when a server or IOM is inserted (optional). If a
fabric mismatch is detected, the server or IOM is allowed to power on and the
status LED flashes Amber.
Invalid Configurations
There are three types of invalid configurations:
• Invalid MC or LOM configuration, where a newly installed server’s fabric
type is different from the existing IOM fabric
• Invalid IOM-MC configuration, where a newly installed IOM’s fabric type
and the resident MC’s fabric types do not match or are incompatible
• Invalid IOM-IOM configuration, where a newly installed IOM has a
different or incompatible fabric type from an IOM already installed
in its group