Dell POWEREDGE M915 - Manual (Page 90)

90 About Your System
10 Gb Ethernet Pass-Through I/O Module
The 10 Gb Ethernet pass-through module supports 1/10 Gb connections and
provides a direct connection between the optional internal Ethernet
mezzanine card in the blade and an external Ethernet device. The Ethernet
pass-through modules are hot-swappable and may be installed in Fabric B or
Fabric C.
The 10 Gb Ethernet pass-through I/O module enables you to use optical SFP,
SFP+, and direct-attached copper (DCA) SFP+ modules. The I/O module
and the SFP+ modules can operate at either 1 Gbps or 10 Gbps under the
following conditions:
• To operate at 10 Gbps, you must use either optical SFP+ short reach (SR),
long reach multimode (LRM), or DCA SFP+ modules.
• To operate at 1 Gbps, you must use optical SFP transceivers that support a
data rate of 1 Gbps. While connecting at 1 Gbps to an external switch, the
external switch must be set to the forced 1G mode and the auto-
negotiation option must be turned off.