Spirent Smartbits LAN-3311A 2-Port 1000SX Module for SMB6000B/C

The Spirent Smartbits LAN-3311A is a 2-port 1000Base-X Gigabit Ethernet test module engineered for the SMB6000B/C chassis. This TeraMetrics line module delivers wire-rate traffic generation and analysis across dual ports, each rated at 1 Gbps. It supports hot-swappable GBIC converters for flexible fiber connectivity, enabling multi-mode or single-mode fiber deployment.

The LAN-3311A executes comprehensive Layer 2 and Layer 3 network testing, from QoS analysis to device qualification under extreme traffic loads.

Technical Specifications

• Interface Type: 1000Base-X Ethernet with GBIC (Gigabit Interface Converter) support


• Ports: 2


• Data Rate: 1 Gbps per port


• Wavelength: 850 nm (typical for 1000Base-SX multi-mode fiber)


• Frame Size Range: 40 to 16,384 bytes


• Capture Buffer: 1 MB


• Stream Capacity: Analysis of up to 64,000 streams


• Chassis Compatibility: SMB6000B, SMB6000C, and SMB-600


• Slot Requirement: One slot per module

Key Features

• Generates and responds to 802.3x flow control frames


• Supports 802.1p, 802.1q, and 802.3ac VLAN-tagged frames


• IP header checksum generation and validation with source/destination increments


• Bit error detection in Layer 3 forwarding devices


• Simulates millions of clients and servers across virtually unlimited address space


• Mask-based address skipping for streamlined test configuration


• 1 MB capture buffer logs and exports filtered events to protocol analysis tools

Testing Capabilities

• Performance measurement of 10/100/1000 Mbps networking devices under typical and extreme traffic conditions


• Stress and negative testing via errored traffic injection


• Interoperability validation for Layer 2 and Layer 3 devices


• Network layer QoS analysis and comparative device performance analysis


• Firmware regression and post-upgrade qualification testing

Compatibility & Integration Installs in a single module slot within SMB6000B, SMB6000C, or SMB-600 chassis. Hot-swappable GBIC converters enable selection of multi-mode or single-mode fiber with standard LC connectors based on GBIC type installed.