VIAVI TestCenter B3-800-OSFP-8-1200A 8-Port OSFP 800G/400G Appliance Bundle

VIAVI B3 8-port OSFP 800G test appliance bundle with 800G and 400G speeds

Default time source: Stratum-3 rated oscillator
Transmit line clock: ± < 1 PPM
Long-term clock accuracy: ± 4.6 PPM
Frame time-stamp resolution: 2.5ns

Datasheet

Overview

The VIAVI TestCenter B3 800G appliances are QSFP-DD800 and OSFP800 test platforms. They validate hyperscale data centers, AI clusters and high-performance Ethernet fabrics from Layer 1 through Layer 3. The family comes in 4-port and 8-port configurations and generates up to 6.4 Tbps of test traffic.

In 112 Gbps PAM4 mode, the appliances support 1x800G, 2x400G, 4x200G and 8x100G, in line with Ethernet Technology Consortium 800GBASE-R and IEEE 802.3ck and 802.3df 800GBASE-R. In 56 Gbps PAM4 mode they support 1x400G, 2x200G and 8x50G per IEEE 802.3cd and IEEE 802.3bs. Auto Negotiation and Link Training (AN/LT) follow IEEE 802.3df for all supported speed modes. Smart Port Technology is a licensed feature that allows single-port and speed upgrades.

AI infrastructure testing

For AI data center work, the B3 emulates GPUs and NICs using full-stack RoCEv2 transport and Ultra Ethernet Transport (UET). It supports Collective Communication Library (CCL) traffic patterns and LLM training traffic emulation. UEC 1.0 support covers Transport Layer and Link Layer emulation, plus a conformance test suite with over 50 built-in test cases. Autonomous Flow Tracking (AFT) on 8-port models monitors very large numbers of flows, for example in BGP route import scenarios.

Software and automation

The appliances run under VIAVI TestCenter. Automation is available through Command Sequencer visual programming, GUI to Script, and a REST API. The TestCenter Model Context Protocol (MCP) Server is part of the VIAVI NITRO AI portfolio. It lets AI agents configure, execute, monitor and analyze tests through natural language. XStream mode raises traffic generation and protocol scale.

Key Features

Flexible port speeds supporting 1×800G, 2×400G, 4×200G, 1×400G, 2×200G, 8×100G and 8×50G PAM4
RS-FEC, Auto Negotiation (AN) and Link Training (LT) per IEEE 802.3df
AI infrastructure testing for RoCEv2, CCL and Ultra Ethernet Transport (UEC 1.0), including transport and link-layer LLR testing
L2/L3 routing and switching and data center protocol testing
Autonomous Flow Tracking (AFT) on 8-port modules
TestCenter MCP Server for natural-language test configuration, execution and analysis
QSFP-DD and OSFP test platform for high-scale testing
Layer 1 debug including RS-FEC performance analysis and interconnect monitoring
Support for optical transceivers, AOC, passive copper (DAC) and active electrical copper cables (AEC)
Up to 6.4 Tbps of test traffic
Smart Port Technology licensed single port and speed upgrades
XStream mode for increased traffic generation and protocol scale
Self-calibrating inter-chassis timing chain with daisy chaining of up to 255 appliances
Command Sequencer visual programming and GUI to Script automation
UEC 1.0 conformance test suite with over 50 built-in test cases

Specifications

General

Default time source	Stratum-3 rated oscillator
Transmit line clock	± < 1 PPM At the precise nominal Ethernet rate on initial shipment
Long-term clock accuracy	± 4.6 PPM 15 years of operation
Frame time-stamp resolution	2.5ns
External time sources	GPS and CDMA-based; IEEE 1588v2 and NTP packet-based; TIA/EIA-95B-based
Appliance time synchronization	± 20ns VIAVI-patented self-calibrating inter-chassis timing chain using dedicated port on appliance
Daisy chain	Up to 255 appliances
Operating temperature range	41° F to 86° F (5° to 30° C) Ambient temperature
Relative humidity	20% to 80%
Max power draw	Maximum 2100W at 100-240 VAC
Product dimensions	29.5 in D x 17.1 in W x 3.5 in H (74.9 cm x 43.4 cm x 8.9 cm)
MSA interface	OSFP800
Bundle	B3 8-Port OSFP 800G/400G Bundle
Unit installed weight	57 lb. (25.85 kg) 8-port appliance

Layer 1 Functionality

Speed modes	1x800G, 2x400G, 4x200G, and 8x100G in 112Gbps PAM4 modes; 1x400G, 2x200G and 8x50G in 56Gbps PAM4 mode Speeds available depend on the purchased bundle and speed options
QSFP/OSFP interconnects	CR, SR, LR, FR, DR, ZR at multi-rate (800/400/200/100/50G)
FEC	RS (544,514) FEC supported for all PAM4 speed modes
Optical transceivers, 112 Gbps PAM4 mode	1x800G: 800GBASE-SR8, 800GBASE-DR8, and 800GBASE-FR8; 2x400G: 800GBASE-SR8, 800GBASE-2FR4, 400GBASE-DR4, 400GBASE-FR4; 4x200G: 800GBASE-SR8; 8x100G: 800GBASE-SR8
Copper cable, 112 Gbps PAM4 mode	1x800G/2x400G/4x200G/8x100G: 800GBASE-CR8 Copper cable types include Direct Attached Copper Cable (DAC), Active Electrical Cable (AEC), and breakout cable
Optical transceivers, 56 Gbps PAM4 mode	1x400G: 400GBASE-SR8, 400GBASE-DR4, 400GBASE-FR4, 400GBASE-LR4, 400GBASE-LR8, 400GBASE-ZR, and 400GBASE-ZR+; 2x200G: 400GBASE-SR8 and 200GBASE-FR4; 8x50G: 400GBASE-SR8
Copper cable, 56 Gbps PAM4 mode	1x400G/2x200G/8x50G: 400BASE-CR8, 200GBASE-CR4 Copper cable types include Direct Attached Copper Cable (DAC), Active Electrical Cable (AEC), and breakout cable
Auto-Negotiation/Link Training (AN/LT)	AN/LT supported for 1x800G, 2x400G, 4x200G, 8x100G, 1x400G, 2x200G, and 8x50G IEEE 802.3 compliant
Layer-1 debug tools and features	Pre/Post FEC Codeword statistics, Tx Emphasis settings, Rx Eye view, FEC Counters, PRBS Gen/Check, Front-end L1 Summary Status, Xcvr MDIO access, PCS monitoring
PRBS patterns	PRBS-9Q, PRBS-10Q, PRBS-11Q, PRBS-13Q, PRBS-15Q, PRBS-20Q, PRBS-23Q, PRBS-31Q, PRBS-49Q, PRBS-58Q
L1 FEC alarms	High Symbol Error Rate, Loss of Alignment Marker Payload Sequence, Loss of Alignment

TestCenter Layer 2-3 Generator and Analyzer

Number of streams, Stats/Streams (Tx/Rx), default mode	800G (4K/32K), 400G (16K/32K), 200G (8K/16K), 100G (4K/8K), 50G (2K/4K)
Number of streams, Stats/Streams (Tx/Rx), XStream mode	32K/32K for 800G, 400G, 200G, and 100G Enabled by the XStream mode
Number of paths/raw streamblocks	127 (800/50G), 511 (400/200G), 255 (100G); 511 (800/400/200/100G) enabled by XStream mode
Frame transmit modes	Port based (rate per port), stream based (rate per stream), burst, timed, random frame size with unique seed
Min/max frame size (w/CRC)	64-16383
Min/max Tx rates	1 packet per 1.37 seconds to 101% of line rate
Real-time Tx stream adjustments	Change rate and frame length settings without stopping the generator or analyzer
Per-stream statistics analyzed in real time	Tx and Rx frame counts and rates; Tx and Rx Layer 1 byte counts and rates; FCS errors and rates; Min, Max, and Average Latency (32K streams); Real Time Dropped Frame count; Advance Sequence Tracking: Duplicate, reordered, late, and inordered
Per-port statistics analyzed in real time	Tx and Rx frame counts and rates; Tx and Rx Layer 1 byte counts and rates; PRBS errors; FCS errors and rates
Flow control	Support Priority Flow Control
Transmit timestamp resolution	800G: 2.5 ns Tx timestamp resolution With intra-chassis and inter-chassis synchronization
Supported encapsulations	Layer 2: Ethernet II, 802.1Q, 802.1ad; Layer 3/4: IPv4, IPv6, TCP, UDP
Supported Tx signature capability	Fully compatible with VIAVI hardware; contains sequence number and highly accurate timestamp
Capture buffer size	1.28 MB per port (MAX)
Capture filter patterns	User defined pattern definitions can logically combine 8 filters of up to 32 total bytes Patterns can be applied to start, filter (quality), or stop capture
Latency modes	LIFO, LILO, FIFO or FILO Latency calculation methods supported by benchmark tests
Route Insertion Table (RIT) entries per port	128K (800/400/200G), 64K (100G), 32K (50G) 4-byte entries For dynamic label or random IP/MAC address assignments
RIT entries per port, XStream	1M (800G), 256K (200/100G) 4-byte entries as primary table, and a secondary 64K (400/200/100G) entries table Enabled by XStream
RIT or list VFD entries per stream	8 RIT insertions per stream (800/400/200/50G); 6 RIT insertions per stream (100G); 4 VFD insertions per stream for all supported speeds

AI Testing

GPU/NIC emulation	8 GPUs / NICs emulated per port
CCL traffic patterns	AlltoAll with PXN, All to ALL without PXN, RingAllReduce, Halving and Doubling, Dual Tree, RingReduceScatter, RingAllGather, Alternating Ring, Point to Point, Mixed Traffic Patterns and Background Traffic
LLM model emulation	Chat GPT, llama, DeepSeek, RestNet, and AlexNet To emulate training traffic models
RoCEv2 configuration	RoCEv2 profile applied per port; Up to 4K Queue Pairs per port; RC and UD transport mode; DCQCN congestion control; Traffic mode – Continuous and Bursty; Full Mesh, One-to-One, One-to-Many; Bi-direction and Uni- direction traffic
UET configuration	State full Link Layer; Link Layer Retry (LLR); Link Layer Error insertion; State full Transport layer; Reliable ordered delivery (ROD); Reliable un-ordered delivery (RUD); High number of Fabric End Point (FEP); RCC Congestion Control; Packet trimming; Dynamic entropy change; Traffic mode – Continuous and Bursty; Full Mesh, One-to-One, One-to-Many; Bi-direction and Uni- direction traffic
RoCEv2 throughput	800G, 400G, 200G, 100G
UET throughput	800G, 400G, 200G, 100G
Congestion avoidance	Packet Trimming support; Multi pathing support
Congestion control	ECN, PFC combination for lossy and lossless fabric; ECN detection, CNP notification; CNP interval; QoS priority for CNP notification; DCQCN; NSSC and RCC
Key results and statistics	JCT, Ideal JCT; Tail latency (P95/P99/P99.9); Algorithm bandwidth (algbw) and Bus bandwidth (busbw) based on JCT; CCL Traffic Chart algbw and busbw based on transmission time; Total Transmission Time, Total Training Time; Average, Max and Min Iteration Time; Throughput, packet loss, out of sequence packets, packet latency; ECN, CNP TX/RX; Receiver Window Size; Packet Rate; RTT; Retransmission Rate Available on Web and Windows GUI
UEC conformance test suite	over 50 built-in test cases Validates implementations against the UEC 1.0 specification

AFT Support

Trackable flow count (AFT) B3-800-OSFP-8-1550A, B3-800-OSFP-8-1300A, B3-800-OSFP-8-1200A, B3-800-OSFP-8-800A	Tx: 1 Million, Rx: 4K AFT only supported on B3 8-port 800G and 400G; sub-speeds will be available in future software releases
HW stream blocks B3-800-OSFP-8-1550A, B3-800-OSFP-8-1300A, B3-800-OSFP-8-1200A, B3-800-OSFP-8-800A	128
Max RIT table entries B3-800-OSFP-8-1550A, B3-800-OSFP-8-1300A, B3-800-OSFP-8-1200A, B3-800-OSFP-8-800A	128K
Rx out of sequence B3-800-OSFP-8-1550A, B3-800-OSFP-8-1300A, B3-800-OSFP-8-1200A, B3-800-OSFP-8-800A	Support Out-of-Seq at per flow level
Removed generator / analyzer features B3-800-OSFP-8-1550A, B3-800-OSFP-8-1300A, B3-800-OSFP-8-1200A, B3-800-OSFP-8-800A	Pattern Fill / Pattern Match
Egress flow tracking B3-800-OSFP-8-1550A, B3-800-OSFP-8-1300A, B3-800-OSFP-8-1200A, B3-800-OSFP-8-800A	Supported

Requirements

GUI operation	Windows-based workstation with 10/100/1000 Mbps Ethernet NIC; mouse and color monitor
Automation scripting	Linux or Windows-based workstation
REST API support	Mac, Linux, or Windows-based workstation

Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.

Applications

AI data center and GPU cluster validation
AI back-end fabric, GPU, AI accelerator and AI NIC testing
800G switch and router validation
Multi-vendor interoperability validation
Cloud computing and streaming services QoS validation
Data center ToR and EoR switches and fabrics
Chipset and silicon verification
Terabit router testing
Full Layer 2–3 testing including RFC 2544, 2889, 3918, 8239 and 6349
AI-driven test automation

Options & Accessories

Option	Description
HWO-B3-ROCE-ECN-800-4	VIAVI RoCE ECN-800G for B3-800-OSFP or B3-800-QD — 4 X 800G PAM4 ports total per appliance
HWO-B3-ROCE-ECN-400-8	VIAVI RoCE ECN-400G for B3-800-OSFP or B3-800-QD — 8 X 400G PAM4 ports total per appliance
HWO-B3-ROCE-ECN-200-16	VIAVI RoCE ECN-200G for B3-800-OSFP or B3-800-QD — 4-port B3: 8 X 200G PAM4 ports. 8-ports B3: 16 x 200 PAM4 ports total per appliance.
HWO-B3-ROCE-ECN-100-16	VIAVI RoCE ECN-100G for B3-800-OSFP or B3-800-QD — 4-port B3: 8 X 100G PAM4 ports. 8-ports B3: 16 x 100 PAM4 ports total per appliance.
HWO-B3-ROCE-ECN-1500A	VIAVI RoCE ECN-800G/400/200/100 Suite for B3-800-OSFP or B3-800-QD
HWO-B3-ROCE-ECN-1200A	VIAVI RoCE ECN-800G/400G Suite for B3-800-OSFP or B3-800-QD — 4-port B3 and 8-port B3: 4 X800G PAM4 ports or 8 X 400G PAM4 ports total per appliance.
HWO-B3-ROCE-ECN-1100A	VIAVI RoCE ECN-800G/200/100 Suite for B3-800-OSFP or B3-800-QD
HWO-B3-ROCE-ECN-1000A	VIAVI RoCE ECN-800G/200 Suite for B3-800-OSFP or B3-800-QD
HWO-B3-ROCE-ECN-700A	VIAVI RoCE ECN-400G/200/100 Suite for B3-800-OSFP or B3-800-QD
HWO-B3-ROCE-ECN-600A	VIAVI RoCE ECN-400G/200 Suite for B3-800-OSFP or B3-800-QD
HWO-B3-ROCE-ECN-500A	VIAVI RoCE ECN-400G/100 Suite for B3-800-OSFP or B3-800-QD
HWO-B3-ROCE-ECN-300A	VIAVI RoCE ECN-200G/100 Suite for B3-800-OSFP or B3-800-QD
HWO-B3-CCL-4	VIAVI CCL for B3-800-OSFP or B3-800-QD — Speeds are included: 4 X 400G PAM4 or 4 X 800G PAM4 ports per appliance
HWO-B3-UET-800-8	UET 800G for B3-800-QD or B3-800-OSFP — 4X 800G PAM4 ports total per test module
HWO-B3-UET-400-8	UET 400G for B3-800-QD or B3-800-OSFP — 8X 400G PAM4 ports total per test module
HWO-B3-UET-1500A	UET 800G/400G/200G/100G Suite for B3-800-QD or B3-800-OSFP
HWO-B3-UET-1200A	UET 800G/400G Suite for B3-800-QD or B3-800-OSFP
HWO-B3-UET-600A	UET 400G/200G Suite for B3-800-QD or B3-800-OSFP
HWO-B3-UET-500A	UET 400G/100G Suite for B3-800-QD or B3-800-OSFP
HWO-B3-UET-300A	UET 200G/100G Suite for B3-800-QD or B3-800-OSFP
HWO-B3-UET-200-8	UET Transport Layer-400G/100G Suite for B3-800-QD or B3-800-OSFP — 4-port B3: 8 X200G PAM4 ports. 8-port B3: 16 X 200G PAM4 ports total per test module
HWO-B3-UET-100-8	UET 400G/100G Suite for B3-800-QD or B3-800-OSFP — 4-port B3: 8 X100G PAM4 ports. 8-port B3: 16 X 100G PAM4 ports total per test module
AON-B3-AI-4-1500A	B3 RoCE ECN and CCL 800G/400G/200G/100G Bundle (AION)
TPK-1106	CCL Automation Benchmark Test Package — Requires RoCEv2 and CCL license. Works with A1, B2, and B3 only.
HWO-B3-800-OSFP-8-50G	50G 112G/56G PAM4 HW Speed Option for B3-800-OSFP-8-T1S
HWO-B3-800-OSFP-8-100G	100G 112G/56G PAM4 HW Speed Option for B3-800-OSFP-8-T1S
HWO-B3-800-OSFP-8-200G	200G 112G/56G PAM4 HW Speed Option for B3-800-OSFP-8-T1S
HWO-B3-800-OSFP-8-400G	400G 112G/56G PAM4 HW Speed Option for B3-800-OSFP-8-T1S
HWO-B3-800-OSFP-8-800G	800G 112G/56G PAM4 HW Speed Option for B3-800-OSFP-8-T1S
HWO-B3-800-OSFP-8-PORT	B3-800-OSFP-8 Single Port Enablement
SWO-B3-800-OSFP-8-MACSEC	MACsec Software on B3-800-OSFP-8-T1S Appliance
BPK-1407	Autonomous Flow Tracking (AFT) Package — Only supported on B3 8-port 800G and 400G, sub-speeds will be available in future software releases.