promwad Network switch

Network Switches

Network Switches Design

Since 2004, Promwad has been helping customers to be on the cutting edge of telecommunication technologies, creating for them new network appliances, NIC, and embedded software.

Our telecom R&D unit has hands-on experience with network switch technology and switch SDK from leading chip vendors. We are vendor agnostic and have an unbiased point of view on different switch hardware.

Our services

Our scope of services in managed switches include:

  • Bespoke board design of multi-port (8/16/24/48) gigabit network switch with uplinks and specific interfaces required by customer;
  • Network system-level software on top of Microchip (ex. Microsemi) IStaX;
  • Network system-level software on top of Marvell CPSS (Prestera Software Suite);
  • Utilize switchdev;
  • New Linux kernel driver model for Ethernet switches;
  • ONIE (Open Network Install Environment) customizations and installation on target network switch board/hardware;
  • SONiC (Software for Open Networking in the Cloud) porting to different switch platforms;
  • OpenSwitch software development.
managed switches promwad

Types of network switches at Promwad

To choose the suitable switch solution that keeps up with the requirements, you need to understand the existing types of network switches. Here, at Promwad, we focus on the following:

Gigabit network switches
Industrial network switches
PoE network switches
Managed network switches
DIN rail network switches
SFP network switches
Unmanaged network switches
Redundant network switches
Waterproof network switches

Networking hardware and equipment

zynqus+ networking 10G udp

Ethernet switching

We design Ethernet switching equipment which serves as an integral part of any intelligent network. Our goal is to make them as non-blocking and scalable as possible. Among the examples of Ethernet switching devices are:

  • stackable & managed access switches 
  • carrier Ethernet switches/routers/gateways
  • security appliances
  • aggregation switches & routers


zynqus+ jesd204b linux adc dac ddr4

Industrial network equipment and IIoT

We design extensible switches and routers for the industrial Internet of Things industry. They support auto-configuration, address learning, forwarding and filtering, and special means to handle Quality of Services or QoS. Clients use them in factory automation, smart grids, etc. The examples are:

  • switches for industrial process control
  • transportation and automotive applications
  • energy utility networks or smart grid distribution
q-in-q microchip

Selective Q-in-Q

SDK: Microchip IStaX-APPL-2020.09.

Tested on a PCB135 debug board from Microchip on VSC7558. Q-in-Q operates on the Sparx-5 microprocessor family.

Description: Selective Q-in-Q determines the pairing of a given client VLAN (on the UNI side) and the sought S-VLAN identifier. The S-VLAN identifier is joined to the input unmodified C-VLAN, and the packet is forwarded across the ISP's double-tagged network. The S-VLAN ID is removed from the output, and the client VLAN ID is retained in the packet. Packets that do not match the specified client VLANs are discarded by default. 

q-in-q microchip

Multiprotocol Label Switching (MPLS)

SDK: Microchip IStaX-APPL-2020.09.

Tested on a PCB135 debug board from Microchip on VSC7558. MPLS operates on the Sparx-5 microprocessor family.

Description: MPLS is a packet-forwarding technology which uses labels to make data forwarding decisions. The biggest advantage using MPLS is that the Layer 3 header analysis is done just once (when the packet enters the MPLS domain). Intermediate routers will not analyze the IP packet, thus saving valuable router resources, and greatly increasing the speed at which packets are forwarded. Label inspection drives subsequent packet forwarding. Further MPLS supports following applications:

  • Virtual Private Networking (VPN)
  • Traffic Engineering (TE)
  • Quality of Service (QoS)
  • Any Transport over MPLS (AToM)

Additionally, it decreases the forwarding overhead on the core routers.

Features of the Ethernet switches

We develop telecom equipment with a rich set of features. Below you can see what features do Ethernet switches at Promwad have:

High-performance, full-featured 3- to 52-port 1/2.5/10 Gbps
Access Control List (ACL) layer 2, 3, and 4 packet processing
Full VLAN and Quality of Service (QoS) support
Layer 2 and layer 3 forwarding
MEF CE 2.0 Ethernet Virtual Connections (EVCs)
IEEE 1588v2 Precision Time Protocol (PTP) support
Audio Video Bridging (AVB) and Time Sensitive Networking (TSN) support
Low-power, energy-efficient, enhanced power management
Fault tolerance redundancy engine
Enhanced link diagnostics
OAM, performance monitoring, SAT
Multiprotocol Label Switching (MPLS)
A model range of industrial managed gigabit switch equipment with 8 and 16 ports
a series of managed 16- and 24-port Gigabit switches based on Realtek 83xx chipset
A model range of industrial managed gigabit switch equipment with 8 and 16 ports
a series of managed 16- and 24-port Gigabit switches based on Realtek 83xx chipset

Get access to our CoreKnowledge in telecom


Working with several contractor partners in network switch design projects to obtain the necessary expertise always leads to complications and slow communications and eventually increases labor costs.


We conducted an internal analysis of all our projects (their number is +350) and noticed an increase in mixed project teams by at least 13-27%, depending on the number of members. According to statistics, the average volume of such projects is about $146,000, and the client's potential savings are up to $19,000.

Our solution


At least 15% of the working time all our developers spend on training and professional growth without exception.


Due to our business model's specific nature, we continuously face tasks and challenges from different technological areas. That has allowed us to accumulate in-depth experience, which we are always ready to share with our clients and partners in a form of dedicated teams with mixed expertise.


Working with us, clients get access not only to the core team but also to the knowledge base accumulated by Promwad over the years.

Why Promwad


Close partnership with vendors, access to the best SDKs, extensive portfolio in telecom, and deep expertise give us a strong competitive advantage in the niche


Our experience allows us to enroll in any kind of network switch dev projects as fast as possible. At the same time, we are ready to provide flexible cooperation models


We can act as a guide for vendors' SDKs in local markets. We provide support to the vendors' clients, leave feedback after working with products, and popularize them in target groups

Our tech map


Ethernet 1G/2.5G/10G/40G/100G, WiFi 5, WiFi 6 and WiFi 6E, BLE and Bluetooth 5.X, DECT, ADSL, SHDSL, RapidIO, Gh.n


Fast-Path network processing, Hardware-accelerated NAT, Linux DSA, distributed switch architecture, VoIP and telephony SLIC interfacing, DECT, Ethernet packet processing, Remote management, TSN and IIoT networks, MPLS

Switch SW

Port speed, duplex mode, flow control, link control, statistics, MIB counters, PoE and PoE+ with LLDP, Hotplug SFP detection, QoS traffic classification, port priority, etc.


Microchip, Realtek, Marvell, NXP, TI, Broadcom, Centec

Ivan Kuten

"Many of our clients have their own R&D departments and experience with Chinese manufacturers. However, they choose Promwad to take their business to the next level, as they trust our experience in telecom electronics design and partnership with world-leading semiconductor vendors."

— Ivan Kuten, Co-owner & Tech Expert at Promwad

Do you need a quote for your design or manufacturing project in network switches?

Drop us a line about your project! We will contact you today or the next business day. All submitted information will be kept confidential.