Features And Benefits; Table 7: Features - Mellanox Technologies ConnectX-5 Ex User Manual

1.3

Features and Benefits

Table 7 - Features
PCI Express (PCIe)
Up to 100 Gigabit Ethernet
Memory
Overlay Networks
RDMA and RDMA over
Converged Ethernet (RoCE)
Mellanox PeerDirect™
CPU Offload
Rev 1.7
a
Uses PCIe Gen 3.0 (8GT/s) and Gen 4.0 (16GT/s) through an x8 or x16 edge
connector. Gen 1.1 and 2.0 compatible.
Mellanox adapters comply with the following IEEE 802.3 standards:
– 100GbE/ 50GbE / 40GbE / 25GbE / 10GbE / 1GbE
– IEEE 802.3bj, 802.3bm 100 Gigabit Ethernet
– IEEE 802.3by, Ethernet Consortium25, 50 Gigabit Ethernet,
supporting all FEC modes
– IEEE 802.3ba 40 Gigabit Ethernet
– IEEE 802.3by 25 Gigabit Ethernet
– IEEE 802.3ae 10 Gigabit Ethernet
– IEEE 802.3ap based auto-negotiation and KR startup
– Proprietary Ethernet protocols (20/40GBASE-R2, 50GBASE-R4)
– IEEE 802.3ad, 802.1AX Link Aggregation
– IEEE 802.1Q, 802.1P VLAN tags and priority
– IEEE 802.1Qau (QCN)
– Congestion Notification
– IEEE 802.1Qaz (ETS)
– IEEE 802.1Qbb (PFC)
– IEEE 802.1Qbg
– IEEE 1588v2
– Jumbo frame support (9.6KB)
PCI Express - stores and accesses Ethernet fabric connection information and
packet data.SPI Quad - includes 128Mbit SPI Quad Flash device
(W25Q128FVSIG device by ST Microelectronics)
VPD EEPROM - The EEPROM capacity is 128Kbit.
In order to better scale their networks, data center operators often create overlay
networks that carry traffic from individual virtual machines over logical tunnels
in encapsulated formats such as NVGRE and VXLAN. While this solves net-
work scalability issues, it hides the TCP packet from the hardware offloading
engines, placing higher loads on the host CPU. ConnectX-5 effectively
addresses this by providing advanced NVGRE and VXLAN hardware offload-
ing engines that encapsulate and de-capsulate the overlay protocol.
ConnectX-5, utilizing IBTA RDMA (Remote Data Memory Access) and RoCE
(RDMA over Converged Ethernet) technology, delivers low-latency and high-
performance over Band and Ethernet networks. Leveraging data center bridging
(DCB) capabilities as well as ConnectX-5 advanced congestion control hard-
ware mechanisms, RoCE provides efficient low-latency RDMA services over
Layer 2 and Layer 3 networks.
PeerDirect™ communication provides high efficiency RDMA access by elimi-
nating unnecessary internal data copies between components on the PCIe bus
(for example, from GPU to CPU), and therefore significantly reduces applica-
tion run time. ConnectX-5 advanced acceleration technology enables higher
cluster efficiency and scalability to tens of thousands of nodes.
Adapter functionality enabling reduced CPU overhead allowing more available
CPU for computation tasks.
Open VSwitch (OVS) offload using ASAP
• Flexible match-action flow tables
• Tunneling encapsulation / decapsulation
Mellanox Technologies
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Introduction
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