VSC7431
28-Port Layer 2/Layer 3 Managed Ethernet Switch
Microsemi’s next-generation switch engine delivers a multilayer, scalable
Enterprise Ethernet solution.
The VSC7431 E-StaX-III-28 Enterprise Ethernet switch contains twenty-
four 10/100/1000 Mbps Ethernet ports and two 12G interconnect
ports that can be configured to provide 28 ports (24× 1G and 4× 1G).
Two VSC7431 devices can support up to a fifty-six 10/100/1000 Mbps
configuration using the 2× 12 Gbps interconnect ports.
VSC7431 provides a rich set of Enterprise Ethernet switching features.
Using multistage Versatile TCAM technology (VCAP), it delivers VLAN
and QoS processing, enabling the delivery of differentiated services,
security through intelligent frame processing, and egress frame
manipulation.
A powerful 416 MHz CPU in the VSC7431 device enables full
management of a standalone switch without the need for an external
CPU.
A comprehensive application programming interface (API) and software
development package is available for managed Ethernet applications for
faster time-to-market. The software API package integrates easily with
third-party software, preserving existing software investments.
Highlights
• 28 SGMII/SerDes ports support direct
optical connectivity for 1G/1000 Mbps
operation
• 2× 12G interconnect ports support dual-
chip 56-port solution
• Layer 3 unicast/multicast routing
• New shared buffer memory architecture
Applications
• Fully managed L2/L3 switch
28 × 1 GbE Managed L2/L3 Switch
4 × 1G SGMII
52 × 1 GbE Managed Switch
1G SGMII
1G SGMII
1G SGMII
1G SGMII
12G
Interconnect
VSC7431
E-StaX-III-28™
Switch
12 × SGMII
VSC7431
E-StaX-III-28™
Switch
12G
Interconnect
VSC7431
12 × SGMII
E-StaX-III-28™
Switch
12 × SGMII
VSC8512-01
12-Port
10/100/1000BT
SGMII PHY
12 × SGMII
VSC8512-01
12-Port
10/100/1000BT
SGMII PHY
12 × SGMII
VSC8512-01
12-Port
10/100/1000BT
SGMII PHY
VSC8512-01
12-Port
10/100/1000BT
SGMII PHY
12 × SGMII
VSC8512-01
12-Port
10/100/1000BT
SGMII PHY
VSC8512-01
12-Port
10/100/1000BT
SGMII PHY
MagJacks
MagJacks
MagJacks
MagJacks
MagJacks
MagJacks
12 × 1G Copper
12 × 1G Copper
12 × 1G Copper
12 × 1G Copper
12 × 1G Copper 12 × 1G Copper
Microsemi makes no warranty, representation, or guarantee regarding the information contained herein or the suitability of its products and services for any particular purpose, nor does Microsemi assume any liability
whatsoever arising out of the application or use of any product or circuit. The products sold hereunder and any other products sold by Microsemi have been subject to limited testing and should not be used in conjunction
with mission-critical equipment or applications. Any performance specifications are believed to be reliable but are not verified, and Buyer must conduct and complete all performance and other testing of the products, alone
and together with, or installed in, any end-products. Buyer shall not rely on any data and performance specifications or parameters provided by Microsemi. It is the Buyer’s responsibility to independently determine suitability
of any products and to test and verify the same. The information provided by Microsemi hereunder is provided “as is, where is” and with all faults, and the entire risk associated with such information is entirely with the Buyer.
Microsemi does not grant, explicitly or implicitly, to any party any patent rights, licenses, or any other IP rights, whether with regard to such information itself or anything described by such information. Information provided in
this document is proprietary to Microsemi, and Microsemi reserves the right to make any changes to the information in this document or to any products and services at any time without notice.
VSC7431
28-Port Layer 2/Layer 3 Managed Ethernet Switch
Features
• 28× 1 GbE or dual-chip 56× 1 GbE ports with SGMII,
1000BASE-X, 100BASE-FX, or SerDes
• Internal shared memory buffer (8 queues per port)
• Jumbo frame support
• Strict priority and DWRR scheduler/shaper
• Integrated 416 MHz MIPS CPU
• 27 mm × 27 mm FCBGA
Multicast
• Layer 2
• IPv4 and IPv6
• IGMP and MLD
Related Products
Visit www.microsemi.com for information about these related
products:
• SparX-III and E-StaX-III Gigabit Ethernet switches with
integrated copper PHYs
• VSC8512-01 12-port copper PHY
Layer 2 Switching and Layer 3 Forwarding
•
•
•
•
•
•
•
•
802.1Q VLAN switch with 16K MACs and 4K VLANs
Push, pop, and translate ingress/egress
Policing with storm control and MC/BC protection
RSTP and MSTP support
Independent and shared VLAN learning (IVL, SVL)
Hardware and software-based learning
TCAM-based classification and VCAP-II security
Layer 3 unicast and multicast routing
Shared Queue System
Input
Queues
Arbiter
Output
Queues
Drop Statistics
Shaper/Scheduler
Ingress Processing
Ingress
Classification
TCAMs
VCAP-II
Security
TCAMs
Counters
Egress Processing
L2
Forwarding
Ingress
Statistics
Egress
Classification
TCAMs
Frame
Rewriter
Egress
Statistics
Policers
Frame Bus
×1
×1
×24
×2
Device 1G
Triple-Speed MAC
CPU Device
MIPS
24K
FDMA
Device 1G
Triple-Speed MAC
Device 12G
12G MACs
SerDes
SDRAM
SerDes
VAUI SerDes
SGMII NPI Port
DDR2
SGMII
1000BASE-X
100BASE-FX
2× 12G Interconnect
1000BASE-X
100BASE-FX
Microsemi Corporate Headquarters
One Enterprise, Aliso Viejo, CA 92656 USA
Within the USA: +1 (800) 713-4113
Outside the USA: +1 (949) 380-6100
Sales: +1 (949) 380-6136
Fax: +1 (949) 215-4996
email: sales.support@microsemi.com
www.microsemi.com
Microsemi Corporation (Nasdaq: MSCC) offers a comprehensive portfolio of semiconductor and system solutions for com-
munications, defense and security, aerospace, and industrial markets. Products include high-performance and radiation-
hardened analog mixed-signal integrated circuits, FPGAs, SoCs, and ASICs; power management products; timing and
synchronization devices and precise time solutions; voice processing devices; RF solutions; discrete components; enter-
prise storage and communications solutions, security technologies, and scalable anti-tamper products; Ethernet solutions;
Power-over-Ethernet ICs and midspans; custom design capabilities and services. Microsemi is headquartered in Aliso Viejo,
California, and has approximately 4,800 employees worldwide. Learn more at www.microsemi.com.
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and service marks are the property of their respective owners.
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