I/O Expansion Options; Network Adapters - Lenovo System x3250 M5 Product Manual

I/O expansion options

The x3250 M5 server supports two PCIe slots that come standard with all models. The slot form factors
are specified:
Slot 1: PCIe 3.0 x4 (x4-wired); dedicated slot for the H1110 adapter

Slot 2: PCIe 3.0 x8 (x8-wired), full-height, half-length


Network adapters

The x3250 M5 supports up to four integrated Gigabit Ethernet 1000BASE-T RJ-45 ports (two enabled
standard, and two enabled optionally with the FoD upgrade). One port (Ethernet port 1) is shared between
the IMM2 and the operating system.
The integrated network interface controller (NIC) has the following features:
A Broadcom BCM5719 chip

Up to four Gigabit Ethernet ports (two enabled standard, and two enabled optionally with the

00AM013 FoD upgrade)
NIC Teaming (load balancing and failover)

Ethernet features:

Compliant with 1 Gb Ethernet IEEE 802.3, 802.3u, and 802.3ab PHY specifications

Integrated PHY for 10/100/1000 Mbps for multispeed, full, and half-duplex auto-negotiation

Automatic MDI crossover

IEEE 802.3x-compliant flow control support

IEEE 1588 protocol and 802.1AS time synchronization implementation

IEEE802.3az - Energy Efficient Ethernet (EEE)

I/O Virtualization features:

I/O Virtualization support for VMware NetQueue and Microsoft virtual machine queue (VMQ)

Function Level Reset (FLR)

IEEE 802.1q Virtual Local Area Network (VLAN) tagging support

Stateless offload and performance features:

TCP, IP, and User Datagram Protocol (UDP) checksum offload

TCP segmentation offload (TCO)

Large Send Offload (LSO)

Receive Side Scaling (RSS) and Transmit Side Scaling (TSS)

Message Signal Interrupt (MSI) and Message Signal Interrupt Extension (MSI-X) support

Support for jumbo frames up to 9600 bytes

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