Chelsio T540-LP-CR 4-Port 10 Gigabit Ethernet Adapter Card - Part ID: T540-LP-CR

Manufacturer: Chelsio
4-port 1/10GbE Low Profile Unified Wire Adapter with PCIe 3.0 x8, 32K conn. Direct Attach More details...
Price: $470.00
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Chelsio T540-LP-CR 4-Port 10 Gigabit Ethernet Adapter Card - Part ID: T540-LP-CR
Chelsio T540-LP-CR 4-Port 10 Gigabit Ethernet Adapter Card - Part ID: T540-LP-CR
Product Details
High Performance, Quad Port 10GbE Unified Wire Adapter
Enables TCP, UDP, ISCSI, iWARP, and FCoE Offload over Single Unified Wire with SR-IOV, EVB/VNTag, DCB

Chelsio’s T540-LP-CR is a quad port low profile, 10 Gigabit Ethernet Unified Wire adapter with a PCI Express 3.0 host bus interface. The adapter is optimized for storage, cloud computing, HPC, virtualization and other datacenter applications.

This adapter, based on the fifth generation (T5) technology from Chelsio provides the highest performance available and dramatically lowers host-system CPU communications overhead with on-board hardware that offloads TCP/IP, iSCSI, FCoE and iWARP RDMA processing from its host system and frees up host CPU cycles for other applications. As a result, the system benefits from higher bandwidth, lower latency and reduced power consumption.

A large portion of offloads enabled by T540-LP-CR are based on standard TCP, IP, UDP protocols (such as iSCSI and iWARP), and thus can operate with a software peer, or be replaced with a software solution at lower performance, thus providing the requisite reliability for enterprise customers, and allowing incremental installs in the datacenter. It will work with any legacy switch infrastructure and does not rely on new features such as DCB, PFC, ETS, etc.

T540-LP-CR supports IEEE standards-based link aggregation/failover features, as well as inter-adapter failover techniques that make it ideal for critical network applications requiring redundancy and high-availability capabilities. It also includes an integrated Traffic Manager and a built-in eSwitch for robust network traffic flow control, traffic classifier, load balancer, firewall capabilities at the port level.

FCoE and iSCSI support in T540-LP-CR benefit from high reliability features that include memory ECC, data path CRC and T10-DIX offload, in addition to the checksums and CRC available at different protocols layers. High performance iSCSI and FCoE provide a drop-in replacement upgrade from legacy SANs to converged networks.
The Unified Wire Solution
The T540-LP-CR enables a unified wire for LAN, SAN and cluster applications, built upon a high bandwidth and low latency architecture along with a complete set of storage and cluster protocols operating over Ethernet (iSCSI, NVMe-oF, FCoE and iWARP). A unified wire means having the ability to utilize all offload or non-offload protocols at the same time, over the same link, using the exact same firmware, host software, and adapter. Thus, a given system using T540-LP-CR can be easily targeted at different vertical markets and a variety of useful functions enabled (i.e. dial the bandwidth to a given application and assign access control, while offloading only part of the traffic). The Ethernet-only networking thus reduces the infrastructure costs in network adapters, cables, switches, rack space, power, equipment spares, management tools, planning, networking staff and installation.

  • PCI Express Gen3 x8
  • Low latency user-space I/O
  • 32K concurrent offloaded conn. capacity
  • Full TCP and UDP offload
  • Full iSCSI, FCoE offload
  • Full NVMe over Fabrics (NVMe-oF) offload
  • Full iWARP RDMA offload
  • OVS Offload with OpenFlow support
  • DPDK (Data Plane Development Kit)
  • EVB, Flex10, VNTag
  • Integrated media streaming offload
  • HW based firewall and NAT offload
  • Traffic filtering & management
  • IEEE 1588v2 Precision Time Protocol
  • Software Compatible with T4 and T5
  • Supports x86, Armv8 (Aarch64), IBM Power and OpenPOWER Servers

Data-Center Networking
  • Scale out servers and NAS systems
  • Consolidate LAN, SAN, and cluster networks
  • Enhanced network and server security
Cloud Computing
  • Virtualization features to maximize cloud scaling and utilization
  • Runs InfiniBand, Fibre Channel apps unmodified over Ethernet
  • Cloud ready functional and management features
  • QoS and Traffic management
Networked Storage
  • Enable high performance NAS systems and Ethernet-based SANs
  • Develop shared-storage systems providing both file- and block-level services
  • Build high performance storage backend fabrics using Ethernet
High Performance Computing
  • Very-low latency Ethernet
  • High performance RDMA support
  • Increase cluster fabric bandwidth
  • Deploy Ethernet-only networking for cluster fabric, LAN, and SAN


Host Interface
  • PCI Express Gen 3 x8
  • MSI-X, MSI and support for legacy pin interrupts
High Performance RDMA
  • Low latency and line rate bandwidth
  • Enhanced RDMA primitives including Atomics & Immediate data
  • iWARP support in standard OFED
  • Microsoft Network Direct support
  • Native support for Windows Server 2012-R2, 2016, Azure Stack, Storage Replica, Storage Spaces Direct, Client RDMA, SMB-Direct, Network Direct, PacketDirect, VMMQ/vRSS
  • Support for iSER, NFS-RDMA, Lustre-RDMA, NVIDIA’s GPU-Direct, Hadoop-RDMA
UDP & Multicast Offload
  • UDP Sockets API
  • Low user-to-user latency
  • Multicast replication on ingress or egress
  • 128 Virtual and 8 Physical functions
  • 140 port virtual switch
  • OVS Offload
  • EVB, VEPA, Flex10, VNTag
  • 512 MAC addresses
  • NVGRE, VxLAN and GENEVE support
  • Full FCoE offload (Initiator or Target)
  • Open FCoE Offload (Initiator)
  • CRC32 offload generation & verification
  • Ingress & Egress ACL (Access Control List)
  • T10 DIF/DIX support
  • Full iSCSI initiator and target mode stack
  • CRC32 offload generation & verification
  • iSCSI proxy switching based on SCSI CDB
  • Full HBA offload
  • T10 DIF/DIX support
TCP/IP Full Offload
  • Full TCP implementation including IPv4 & IPv6
  • Extensive RFC compliance, fully featured stack
  • VLAN support up to 4096 VLAN IDs
  • Load balancing and Fail-over capabilities
Stateless Offloads
  • TCP/UDP checksum offload for IPv4 & IPv6
  • TSO, LSO, and GSO for IPv4 & IPv6
  • VLAN filtering, insertion & extraction
  • Line rate packet filtering and attack protection
  • Fine granularity time stamping (down to 2ns)
  • Ethernet Routing (packet header rewrite)
  • Packet Tracing and Packet Sniffing
  • IEEE 802.3ae (10 GbE)
  • IEEE 802.3az (Energy Efficient Ethernet)
  • IEEE 802.3z (1 GbE)
  • IEEE 802.1P priority
  • IEEE 802.1Q VLAN tagging
  • IEEE 802.1Qbg EVB/VEPA
  • IEEE 802.Qhn VNTag
  • IEEE 9-2/1Qg/h Congestion Notification
  • IEEE 802.3x flow control
  • IEEE 802.3ad load-balancing and failover
  • Ether II and 802.e encapsulated frames
  • Multiple MAC addresses per interface
  • Jumbo Frames up to 9.6Kbytes
Physical and Environmental
  • Fully RoHS Compliant
  • Operating Temp: 0 to 55ºC or 32 to 131ºF
  • Operating Humidity: 5 to 95%
  • Airflow: 200 lf/m
  • Typical power: 11W
  • Low Profile: H: 2.731” x L: 6.6”

  • 1-year limited hardware warranty – free repair or replacement for faulty hardware due to Chelsio defect or failure.
  • Extended warranty to 3 years can be purchased within first year.
  • 30 days free technical support, software maintenance & upgrades with the purchase of any Chelsio adapter or software product.

Ordering Info

Model: T540-LP-CR
Physical Interface: 10GBASE-SR or LR*
Connector: SFP+
Media: MMF/SMF fiber or twinax (up to 5m)


SM10G-SR: 10G short-reach SFP+ optic module
SM10G-LR: 10G long-reach SFP+ optic module
SRCABLE3M: 3M Fibre optic cable, 10GBASE-SR
LRCABLE3M: 3M Fibre optic cable, 10GBASE-LR

* SFP+ optics sold separately. Only Chelsio-supplied modules may be used

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