Dell PowerEdge M820 Hardware Owner's Manual - Page 48
I/O Connectivity, Guidelines for Installing I/O Modules, General I/O Module Configuration Guidelines
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I/O Connectivity The M1000e enclosure supports three layers of I/O fabric, selectable between combinations of Ethernet, fibre-channel, and Infiniband modules. You can install up to six hot-swappable I/O modules in the enclosure, including fibrechannel switches, fibre-channel pass-throughs, Infiniband switches, Ethernet switches, and Ethernet pass-through modules. Guidelines for Installing I/O Modules You must follow these guidelines when populating I/O modules. See Figure 1-14 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 blade must have a matching mezzanine card installed to support data flow for that I/O module. • If a blade has an optional mezzanine card installed in a Fabric B or Fabric C card slot, at least one corresponding I/O module must be installed to support data flow for that fabric. • Modules may be installed in Fabrics B and C independently (you do not need to install modules in Fabric B before installing modules in the Fabric C slots.) • Slots A1 and A2 only support Ethernet I/O modules. This fabric type is hard-set to Ethernet for these slots and cannot support Fibre Channel, Infiniband, or other fabric type modules. • Fabrics A, B, and C can support Ethernet fabric-type modules. • To enable switch configuration prior to blade imaging, I/O modules are allowed to power-up before a blade is inserted in the enclosure. Fabric A Fabric A is a redundant Ethernet fabric, supporting I/O module slots A1 and A2. The integrated Ethernet controllers in each blade dictate Fabric A as an Ethernet-only fabric. NOTE: Modules designed only for Fabric B or Fabric C cannot be installed in slots A1 or A2. 48 About Your System