Sun Neptune

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Neptune, also known as Sun Multithreaded 10 GbE, is a dual 10 Gbit/s, multithreaded, PCIe x8-based network interface controller for 10 gigabit Ethernet. It was developed and originally produced by Sun Microsystems, and later licensed to Marvell Technology Group in 2007.^[1]

A Neptune-based NIC is integrated in UltraSPARC T2 CPUs (Network Interface Unit, or NIU).^[2]

NIC Features

Stand-alone vs on-chip (NIU) Neptune Features^[2]
Features	NIU	PCI-E NIC
# 10GbE ports	2	2
# transmit DMA channels/port	8	12
# receive DMA channels/port	8	8
Integrated on-chip?	UltraSPARC T2	No
Bus interface?	No	8 lane PCI Express
Bus bandwidth limit?	No	16 Gbit/s each direction
Transmit packet classification	Software	Software
Receive packet classification	Hardware	Hardware

v t e Computer hardware by Sun Microsystems (acquired by Oracle Corporation, 2010)

Processors	SPARC MB86900 microSPARC SuperSPARC UltraSPARC UltraSPARC II UltraSPARC IIe UltraSPARC IIi Gemini UltraSPARC III UltraSPARC III Cu UltraSPARC IIIi UltraSPARC IV UltraSPARC T1 UltraSPARC T2 SPARC T3 SPARC T4 SPARC T5 Rock MAJC

Workstations and servers	Sun-1 Sun-2 Sun-3 Sun386i Sun-4 SPARCstation/server/center Netra Ultra Enterprise Sun Blade Sun Fire Java Workstation SPARC Enterprise

Network computers	JavaStation Sun Ray

Storage hardware	StorageTek 5800 Sun Fire X4500

Other	Sun Modular Datacenter Sun SPOT Sun Neptune

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