Chelsio Communications Chelsio T5, Installation And User Manual, Page: 5 / 19

Chapter 1. Introduction
Chelsio T5 LIO iSCSI Target Offload Driver for Linux
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1. Introduction
Thank you for choosing Chelsio Unified Wire adapters. These high speed, single chip, single
firmware cards provide enterprises and data centers with high performance solutions for various
Network and Storage related requirements.
The Terminator 5 (T5) is Chelsio’s next generation of highly integrated, hyper-virtualized
40/10GbE controllers. The T5 is built around a programmable protocol-processing engine, with
full offload of a complete Unified Wire solution comprising NIC, TOE, iWARP RDMA, ISCSI,
FCoE and NAT support. It scales true 40Gb line rate operation from a single TCP connection to
thousands of connections, and allows simultaneous low latency and high bandwidth operation
thanks to multiple physical channels through the ASIC.
The adapters can fully offload TCP, UDP, iSCSI, iWARP and FCoE over a single Unified Wire.
The adapters also fully support SR-IOV, EVB/VNTag, DCB, Traffic Management and Filtering.
Ideal for all data, storage and high performance clustering applications, the adapters enable a
unified fabric over a single wire by simultaneously running all unmodified IP sockets, Fibre
Channel and InfiniBand applications over Ethernet at line rate.
Designed for deployment in virtualized data centers, cloud service installations and high
performance computing environments, Chelsio adapters bring a new level of performance
metrics and functional capabilities to the computer networking industry.
Linux-IO Target (LIO) is the in-kernel SCSI target implementation in Linux. This open-source
standard supports common storage fabrics, including Fibre Channel, FCoE, iEEE 1394, iSCSI,
NVMe-OF, iSER, SRP, USB, vHost, etc. The LIO iSCSI fabric module implements many
advanced iSCSI features that increase performance and resiliency.
This document describes the installation, use and maintenance of the LIO iSCSI Target Offload
Driver and its various components.
1.1. Features
The LIO iSCSI Target Offload Driver provides the following high level features:

Offloads TCP/IP.

Offloads iSCSI Header and Data Digest Calculations.

Offload Speeds at 10Gb and 40Gb.

Supports Direct Data Placement (DDP).

Supports iSCSI Segmentation Offload.

Supports iSCSI PDU recovery.