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Fabric B
Fabric B is a 1 to 40 Gb/sec redundant fabric, supporting I/O module slots B1 and B2. Fabric B currently
supports 1 Gb or 10 Gb Ethernet, DDR/QDR Infiniband, and 4 Gbps or 8 Gbps fibre channel modules.
Additional fabric types may be supported in the future.
NOTE: Fabric B supports up to 16 Gbps fibre channel, Infiniband FDR (14 Gbps standard), and KR (10
Gbps standard).
To communicate with an I/O module in the Fabric B slots, a blade must have a matching mezzanine card
installed in a Fabric B mezzanine card location.
Modules designed for Fabric A may also be installed in the Fabric B slots.
Fabric C
Fabric C is a 1 to 40 Gb/sec redundant fabric, supporting I/O module slots C1 and C2. Fabric C currently
supports 1 Gb or 10 Gb Ethernet, DDR/QDR Infiniband, and 4 Gbps or 8 Gbps fibre channel modules.
Additional fabric types may be supported in the future.
NOTE: Fabric C supports up to 16 Gbps fibre channel, Infiniband FDR (14 Gbps standard), and KR (10
Gbps standard).
To communicate with an I/O module in the Fabric C slots, a blade must have a matching mezzanine card
installed in a Fabric C mezzanine card location.
Modules designed for Fabric A may also be installed in the Fabric C slots.
Port Auto-Disablement in Quad-Port Network Daughter
Card (Dell PowerEdge M710HD Only)
Systems installed with quad-port Network Daughter Card support a Port Auto-Disablement feature. This
feature disables the third (NIC3) and fourth (NIC4) ports of a quad-port network daughter card during
system boot, if the corresponding I/O module installed in the chassis Fabric A slots does not support
quad-port mapping. This behavior is limited to Fabric A slots only and is automatically enabled or disabled
depending on the type of I/O module installed.
NOTE: A quad-port network daughter card must be used with a 48-port switch module (32 internal
ports) for all the ports to be active.
NOTE: LOM firmware updates are applied only to the enabled ports on a quad-port network
daughter card.
The following table provides an overview of the configurations that enable or disable the NIC3 and NIC4
ports of a quad-port network daughter card.
Table 1. Port Auto-Disablement Decision Table
IOM Slot A1 IOM Slot A2 NIC3 and NIC4
(Enabled/Disabled)
Port Auto-Disablement
Empty Empty Enabled Inactive
Empty Dual Port Disabled Active
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