Stackable switch What is a stackable switch?
A stackable switch is a network switch that can be physically and logically connected with other switches to function as a single unit. This allows network operators to manage multiple switches as a single device, increasing the scale of their network while simplifying configuration, management, and troubleshooting.
Stackable switches are ideal for enterprise and campus networks that require flexibility, ease of growth, and high reliability. They combine the scalability of modular systems with the simplicity and affordability of fixed-configuration switches—making them a smart investment for modern IT infrastructure.
Time to read: 4 minutes 23 seconds | Updated: July 20, 2026
Table of Contents
Key takeaways for stackable switches
- Multiple switches can now operate as a single logical unit, simplifying network configuration, management, and troubleshooting while enabling easy network expansion.
- Provide nondisruptive, scalable growth, allowing organisations to increase port capacity and network size without redesigning the network infrastructure.
- Improved reliability and performance, delivering high availability through failover capabilities and high-speed interconnects that reduce bottlenecks and support business continuity.
How does a stackable switch work?
A stackable switch connects to one or more compatible switches using a physical link to form a single logical unit.
- Front-plane stacking uses an uplink port (usually on the front panel) to connect switches together with a standard Ethernet cable. No specialized stacking modules or cables are required for front-plane stacking.
- Back-plane stacking uses a dedicated stacking port (usually on the back panel) to connect switches together, often requiring a proprietary stacking module or stacking cable.
Once the physical link is formed, the switches in a stack will elect a single primary switch member (called a conductor) to manage the data and control plane for all stack members. Other members of the stack will synchronize with the primary switch to maintain a copy of its configurations. A standby member may be elected to assume the primary switch role to prevent disruption in the data forwarding plane in the event of a failure within the stack.
What are the features of stackable switches?
Stackable switches provide unified management, shared configuration, high-speed interconnects, and scalable port expansion by allowing multiple switches to operate as one logical device. They can improve resiliency through standby or failover roles, reduce operational complexity, and support growth without requiring a full network redesign.
What are the benefits of a stackable switch?
Enterprises with plans for growth need networks that are scalable, reliable, and easy to manage. Stackable switches offer the following benefits:
- Simplified management—All switches in a stack are managed as a single logical switch with a one interface. This vastly simplifies configuration, management, and troubleshooting across large-scale networks.
- Fast Scalability—Stackable switches make it easy to connect more network devices, expanding port capacity and density without needing to redesign the network.
- High availability—Stackable switches make a network more resilient, improving uptime. If one switch in a stack fails, others continue to operate, rapidly electing a new primary switch when needed to help prevent service disruption.
- Improved performance—High-speed interconnects and intelligent inter-stack routing can accelerate network traffic and reduce congestion due to bottlenecks.
- Cost-effective—Stackable switches offer enterprise-grade functionality and high availability, without the additional cost of a modular chassis-based system.
What are the best practices for stackable switches?
To get the most out of stackable switches:
- Plan for scale and consider future needs for growth when selecting switch models and the number of switches in your stack.
- Design your stack with redundant links such as in a ring topology to protect against single points of failure and stack splits.
- Use vendor-approved interconnects like transceivers, stacking cables, and stacking modules for optimal performance, stability, and compatibility.
- Run the same software release across the stack to prevent compatibility issues. Vendors with in-service software upgrade (ISSU) processes can help ensure uptime and prevent service disruption.
- Monitor stack health using a vendor provided management and observability tools, or API based integration with 3rd party tools.
How to configure a stackable switch stack
To configure a stackable switch stack, confirm the switches and software versions are compatible, connect stack members using the supported stacking ports or cables, assign member IDs or priorities, and allow the stack to elect a primary switch. Then apply shared settings, verify member status, and test failover before putting the stack into production.
What are the differences between stackable switches vs. modular switches?
Stackable switches can be composed of fixed switches or modular switches, meaning there is no dependency between each other. Fixed switches are pre-configured with performance, connectivity, and power, while modular switches use replaceable line cards, power supplies, and modules. Modular design provides greater customization and expansion for larger or more complex networks.
What are the HPE stackable switch solutions?
HPE offers a range of stackable switch solutions designed to meet the needs of various network environments, from small businesses to large enterprises. These switches are part of the HPE Aruba Networking and FlexNetwork product lines and provide scalability, high performance, and simplified management.
Below are some of HPE's stackable switch solutions:
- HPE Aruba Networking CX 6200 Series.
- HPE Aruba Networking CX 6300 Series.
- HPE FlexNetwork 5140 EI Switch Series.
- HPE FlexNetwork 5140 Hi Switch Series.
- HPE FlexNetwork 5520 HI Switch Series.
FAQs for stackable switches
Can I stack switches from different vendors?
No, stacking only works with compatible models from the same vendor. Many vendors use specialized stacking technologies, with some needing propriety accessories to interconnect switches in a stack.
How many switches can you stack?
You can typically stack between 2 to 12 switches together as one logical unit depending on the switch model.
What happens if one switch in a stack fails?
If designed with redundancy, the rest of the stack continues to operate. Traffic reroutes automatically in supported topologies.
How do I manage a stack of switches?
A stack of switches is typically managed through a single interface such as a web-based GUI, command-line interface (CLI), or network management software.
Do stackable switches support Power over Ethernet (PoE)?
Yes, many stackable switches support PoE, which allows them to provide power to connected devices such as IP phones, wireless access points, and cameras over the network cables.
What are the differences between stackable switches vs. chassis switches?
Stackable switches combine multiple standalone 1RU switches into one managed system, typically allowing a network to start with a smaller footprint and lower starting cost and scaling the deployment as needed. Chassis switches use centralized frames (most commonly with 4-10RU) with shared backplane, power, and modules, making them better suited for templatized locations, very high-density or core network roles.
Where to buy stackable switches?
Stackable switches can be purchased through buy.hpe.com or through authorized resellers. Buyers should compare compatibility, port density, management features, support options, and warranty coverage before selecting a model, as not all switches support stacking.