The PRO/1000 PT Dual Port Server adapter by Intel delivers the first PCI Express x4 Dual Port 10/100/1000 Gigabit Ethernet adapter for System x with Intel's leading edge IO Advanced Technology (IOAT).
Broadcom NetXtreme I Dual Port - Network adapter - PCI Express 2.0 x1 - Gigabit Ethernet x 2 - for System x3100 M4; x3250 M4; x3300 M4; x3630 M4; x3650 M4 HD; x3755 M3; x3850 X6; x3950 X6
IBM Ethernet Switch B24C - Switch - L3 - managed - 24 x 10/100/1000 - desktop
BNT RackSwitch G8124DC - Switch - L3 - managed - 24 x 10 Gigabit SFP+ - rack-mountable - DC power
BNT RackSwitch G8000DC - Switch - L3 - managed - 44 x 10/100/1000 + 4 x SFP - rack-mountable - DC power
Juniper EX4500 - Switch - L3 - managed - 40 x SFP - desktop
IBM Ethernet Switch J48E - Switch - L3 - managed - 48 x 10/100/1000 - desktop
Brocade VDX 6730-76 Converged Switch - Switch - managed - 60 x 10 Gigabit SFP+ + 16 x 8Gb Fibre Channel