42 About Your SystemI/O ConnectivityThe M1000e enclosure supports three layers of I/O fabric, selectable betweencombinations of Ethernet, Infiniband, and fibre-channel modules. (Additionalfabrics including10 Gb Ethernet will be supported in the future.) You can installup to six hot-swappable I/O modules in the enclosure, including fibre-channelswitches, fibre-channel pass-throughs, Infiniband switches, Ethernet switches,and Ethernet pass-through modules.Guidelines for Installing I/O ModulesYou must follow these guidelines when populating I/O modules. SeeFigure 1-9 for the I/O bay locations.General I/O Module Configuration Guidelines• If an I/O module is installed in Fabric B or Fabric C, at least one blademust have a matching mezzanine card installed to support data flow forthat I/O module.• If a blade has an optional mezzanine card installed in a Fabric B or FabricC card slot, at least one corresponding I/O module must be installed tosupported data flow for that fabric• Within each fabric type, you must install a module in the fabric’s channel1 slot before installing a module in the fabric’s channel 2 slot. For example,you must install a module in slot C1 before installing a module in slot C2.• Modules may be installed in Fabrics B and C independently (you do notneed to install modules in Fabric B before installing modules in the FabricC slots.)• Slots A1 and A2 only support Ethernet I/O modules. This fabric type ishard-set to Ethernet for these slots and cannot support Fibre Channel,Infiniband, or other fabric type modules.• Slots A, B, and C can support Ethernet fabric-type modules.• To enable switch configuration prior to blade imaging, I/O modules areallowed to power-up before a blade is inserted in the enclosure.
