INDUSTRY COMPONENT

MAC Address Table

A MAC address table is a data structure in network switches that maps MAC addresses to physical ports for efficient packet forwarding.

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Component Specifications

Definition
The MAC address table, also known as a Content Addressable Memory (CAM) table, is a critical component within a switching ASIC that stores learned MAC addresses and their associated switch ports. It enables layer 2 switching by allowing the ASIC to make forwarding decisions based on destination MAC addresses, reducing network collisions and improving data transmission efficiency in Ethernet networks.
Working Principle
The MAC address table operates by learning source MAC addresses from incoming frames and associating them with the ingress port. When a frame arrives, the ASIC checks the destination MAC address against the table. If a match is found, the frame is forwarded only to the corresponding port; if not, it is flooded to all ports except the ingress port. This process uses hardware-based lookup mechanisms for high-speed operation.
Materials
Integrated into silicon ASIC; typically uses SRAM or TCAM (Ternary Content Addressable Memory) cells for storage, fabricated with CMOS technology on semiconductor wafers.
Technical Parameters
  • Aging Time Configurable, typically 300 seconds
  • Table Size Up to 128K entries
  • Memory Type TCAM/SRAM hybrid
  • Lookup Speed Nanosecond range
  • Learning Rate Millions of addresses per second
Standards
IEEE 802.1D, IEEE 802.1Q

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for MAC Address Table.

MAC address table switching ASIC CAM table network switching Ethernet switching layer 2 forwarding industrial networking MAC Address Table in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Switching ASIC

A specialized integrated circuit designed to handle data packet switching and routing functions in network equipment.

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Engineering Analysis

Risks & Mitigation
  • Table overflow leading to performance degradation
  • MAC address spoofing attacks
  • Aging timer misconfiguration causing network instability
FMEA Triads
Trigger: Memory corruption in TCAM/SRAM cells
Failure: Incorrect MAC address mappings causing packet loss or misrouting
Mitigation: Implement error-correcting codes (ECC) and periodic table validation routines
Trigger: Excessive broadcast traffic
Failure: Table thrashing and reduced switching performance
Mitigation: Configure broadcast storm control and optimize network segmentation

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
MAC address learning accuracy >99.99%, lookup latency <100ns
Test Method
RFC 2889 benchmarking for LAN switching devices, including address caching capacity and forwarding rate tests

Buyer Feedback

★★★★☆ 4.7 / 5.0 (17 reviews)

"The technical documentation for this MAC Address Table is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Computer, Electronic and Optical Product Manufacturing environments. No issues with the MAC Address Table so far."

"Testing the MAC Address Table now; the technical reliability results are within 1% of the laboratory datasheet."

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Serial Interface
Serial interface for industrial data transmission between IoT gateways and legacy equipment using RS-232/422/485 protocols.

Frequently Asked Questions

What happens when a MAC address table is full?

When the MAC address table reaches capacity, the switch may stop learning new addresses or employ aging algorithms to remove stale entries, potentially causing increased flooding and reduced network efficiency.

How does a MAC address table differ from a routing table?

A MAC address table operates at layer 2 (data link layer) using MAC addresses for switching within a broadcast domain, while a routing table operates at layer 3 (network layer) using IP addresses for routing between different networks.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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