Fabric verification for server IOMs and MCs is performed only when the chassis is powered on. When thechassis is on standby power, the iDRACs on the server modules remain powered off and thus are unable toreport the server's MC fabric type. The MC fabric type may not be reported in the CMC user interface until theiDRAC on the server is powered on. Additionally, if the chassis is powered on, fabric verification is performedwhen a server or IOM is inserted (optional). If a fabric mismatch is detected, the server or IOM is allowed topower on and the status LED flashes Amber.Invalid ConfigurationsThere are three types of invalid configurations:• Invalid MC or LOM configuration, where a newly installed server’s fabric type is different from the existing IOMfabric, that is, a single server’s LOM or MC is not supported by its corresponding IOM. In this case, all the otherservers in the chassis are running, but the server with the mismatched MC card cannot be power on. The powerbutton on the server flashes Amber to alert a fabric mismatch.• Invalid IOM-MC configuration, where a newly installed IOM’s fabric type and the resident MC’s fabric types donot match or are incompatible. The mismatched IOM is held in the power-off state. CMC adds an entry to CMCand hardware logs noting the invalid configuration and specifying the IOM name. CMC causes the error LED onthe offending IOM to blink. If CMC is configured to send alerts, it sends e-mail and/or SNMP alerts for this event.• Invalid IOM-IOM configuration, where a newly installed IOM has a different or incompatible fabric type from anIOM already installed in its group. CMC holds the newly installed IOM in powered-off state, causes the IOM’serror LED to blink, and logs entries in CMC and hardware logs about the mismatch.Fresh Power-up ScenarioWhen the chassis is plugged in and powered up, the I/O modules have priority over the servers. The first IOM in eachgroup is allowed to power up before the others. At this time, verification of their fabric types is not performed. If there isno IOM on the first slot of a group, the module on the second slot of that group powers up. If both slots have IOMs, themodule 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 if their fabric is identical. Switches and pass-throughmodules can exist in the same group even if they are manufactured by different vendors.Monitoring IOM HealthFor information about monitoring IOM health, see Viewing Information and Health Status of All IOMs and ViewingInformation and Health Status For Individual IOM.Configuring Network Settings for IOM(s)You can specify the network settings for the interface used to manage the IOM. For Ethernet switches, the out-of-bandmanagement port (IP address) is configured. The in-band management port (that is, VLAN1) is not configured using thisinterface.Before configuring the network settings for the IOM(s), make sure the IOM is powered on.To configure the network setting, you must have:• Fabric A Administrator privileges to configure IOMs in Group A.• Fabric B Administrator privileges to configure IOMs in Group B.• Fabric C Administrator privileges to configure IOMs in Group C.161
