User's Manual

364 I/O Fabric Management
Invalid Mezzanine Card (MC) Configuration
An invalid MC configuration occurs when a single server’s LOM or MC is not
supported by its corresponding IOM. In this case, all the other servers in the
chassis can be running, but the server with the mismatched MC card does not
be allowed to power on. The power button on the server flashes Amber to
alert a fabric mismatch. For information about CMC and hardware logs, see
"Viewing the Event Logs" on page 398.
Invalid IOM-Mezzanine Card (MC) Configuration
The mismatched IOM is held in the power-off state. CMC adds an entry to
CMC and hardware logs noting the invalid configuration and specifying the
IOM name. CMC causes the error LED on the offending IOM to blink. If
CMC is configured to send alerts, it sends e-mail and/or SNMP alerts for this
event. For information about CMC and hardware logs, see "Viewing the
Event Logs" on page 398.
Invalid IOM-IOM Configuration
CMC holds the newly installed IOM in powered-off state, causes the IOM’s
error LED to blink, and creates entries in CMC and hardware logs about the
mismatch. For information about CMC and hardware logs, see "Viewing the
Event Logs" on page 398.
Fresh Power-up Scenario
When the chassis is plugged in and powered up, the I/O modules have
priority over the servers. The first IOM in each group is allowed to power up
before the others. At this time, no verification of their fabric types is
performed. If there is no IOM on the first slot of a group, the module on the
second slot of that group powers up. If both slots have IOMs, the module in
the second slot is compared for consistency against the one in the first.
After the IOMs power up, the servers power up, and CMC verifies the servers
for fabric consistency.
A pass-through module and switch are allowed in the same group as long as
their fabric is identical. Switches and pass-through modules can exist in the
same group even if they are manufactured by different vendors.