Switch Fabric Component: Specifications and Selection Guide

Product Specifications

Technical details and manufacturing context for Switch Fabric

Definition

A switch fabric is the core hardware component of a network switch responsible for directing data packets between input and output ports at high speeds. It functions as the internal switching matrix that enables simultaneous, non-blocking communication between multiple ports, determining the switch's overall forwarding capacity and performance. The fabric receives data packets from ingress ports, examines header information (like MAC or IP addresses), makes forwarding decisions based on a forwarding table, and routes the packets through an internal high-speed interconnect (often a crossbar, shared memory, or multi-stage switching architecture) to the appropriate egress ports. It manages traffic flow, prioritization, and congestion to ensure efficient data transfer. Typical parameters include switching capacity of 1.28–51.2 Tbps, forwarding rate of 1.9–9.5 Bpps, port density of 32–128 ports (400G), latency of 300–900 ns, packet buffer size of 16–64 MB, power consumption of 150–450 W, operating temperature of 0–70 °C, SerDes data rate of 25.78125–112 Gbps (NRZ or PAM4), package type BGA with 1932–4920 balls, process node 7–16 nm, MTBF 1–5 million hours, supply voltage 0.85–1.05 V core and 1.8 V I/O, relative humidity 5–95% non-condensing, and airflow 200–400 LFM. Materials include semiconductor (silicon), PCB, and copper traces. Relevant standards include IEEE 802.3bs, IEEE 802.3cd, IEEE 802.3ck, IEC 60068-2-14, and JEDEC JESD22-A104. These values are reference ranges; verify model-specific specifications with the manufacturer.

Working Principle

The fabric receives data packets from ingress ports, examines header information (like MAC or IP addresses), makes forwarding decisions based on a forwarding table, and routes the packets through an internal high-speed interconnect (often a crossbar, shared memory, or multi-stage switching architecture) to the appropriate egress ports. It manages traffic flow, prioritization, and congestion to ensure efficient data transfer.

Common Materials

Semiconductor (Silicon), Printed Circuit Board (PCB), Copper traces/interconnects

Technical Parameters

Parameter	Typical range	Notes & selection driver
Switching Capacity	1.28–51.2 Tbps	1.28–51.2 Tbps — Depends on port count and speed (e.g., 32x400G = 25.6 Tbps).
Forwarding Rate	1.9–9.5 Bpps	1.9–9.5 Bpps — Line-rate forwarding for 64-byte packets.
Port Density	32–128 ports	32–128 ports — Number of 400G ports; lower for 800G.
Latency	300–900 ns	300–900 ns — Cut-through latency for 64-byte packets.
Packet Buffer Size	16–64 MB	16–64 MB — Shared memory buffer for congestion management.
Power Consumption	150–450 W	150–450 W — Typical for a single fabric chip; depends on port speed and features.
Operating Temperature	0–70 °C	0–70 °C — Commercial grade; industrial grade may be -40 to 85 °C.
SerDes Data Rate	25.78125–112 Gbps	25.78125–112 Gbps — Per lane; supports 100G/400G Ethernet.IEEE 802.3bs
SerDes Interface	NRZ or PAM4	NRZ or PAM4 — PAM4 for 50G and above.
Package Type	BGA, 1932–4920 balls	BGA, 1932–4920 balls — Flip-chip BGA; ball count varies with I/O.
Process Node	7–16 nm	7–16 nm — CMOS technology; smaller node reduces power and increases density.
MTBF	1–5 million hours hours	1–5 million hours — Depends on operating conditions and thermal management.
Ambient temperature	0–70 °C	0–70 °C — Outside this window: Above 70 °C may cause thermal throttling or permanent damage; below 0 °C may cause startup failures.
Supply voltage	0.85–1.05 V (core), 1.8 V (I/O)	0.85–1.05 V (core), 1.8 V (I/O) — Outside this window: Out of range may cause logic errors or latch-up.
Relative humidity (non-condensing)	5–95 %	5–95 % — Outside this window: Condensation can cause short circuits and corrosion.
Airflow	200–400 LFM	200–400 LFM — Outside this window: Insufficient airflow leads to overheating and reduced lifetime.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Crossbar Switch Matrix
Provides direct, simultaneous point-to-point connections between multiple inputs and outputs, enabling non-blocking switching.

Material: Semiconductor circuits on silicon
Shared Memory Buffer Part
Temporarily stores incoming packets while forwarding decisions are made, managing congestion and packet queuing.

Material: Semiconductor memory (e.g., SRAM, DRAM)
Arbiter/Scheduler
Controls access to the fabric resources, resolving conflicts when multiple inputs request the same output port simultaneously.

Material: Semiconductor logic circuits
Forwarding Table
The lookup table the forwarding decisions are made against.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Switch Fabric.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Network Switch

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Network Switches

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Manufacturers of Switch Fabric

Manufacturer profiles associated with Switch Fabric.

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Frequently Asked Questions

What is a switch fabric?

A switch fabric is the internal high-speed switching and routing subsystem within a network switch. It directs data packets between ports using a forwarding table and an internal interconnect, enabling non-blocking communication.

What are typical switching capacities?

Typical switching capacities range from 1.28 to 51.2 Tbps, depending on port count and speed. For example, 32x400G ports yield 25.6 Tbps. Verify the exact capacity for your model.

Which standards apply to switch fabrics?

Relevant standards include IEEE 802.3bs, IEEE 802.3cd, IEEE 802.3ck, IEC 60068-2-14, and JEDEC JESD22-A104. These are reference standards; confirm compliance with the manufacturer.

What are the operating temperature limits?

The commercial operating temperature range is 0–70 °C. Industrial grades may support -40 to 85 °C. Exceeding these limits can cause thermal throttling or damage. Verify the range for your application.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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Switch Fabric

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards