Switches that can be used for aggregation

Aggregation switches consolidate multiple network links into a single high-bandwidth connection, supporting protocols like LACP for redundancy and improved throughput.

What Are Aggregation Switches?

Aggregation switches are network devices that combine traffic from multiple access switches, wireless access points, or edge devices and forward it to core switches or routers, effectively acting as a bridge between the access and core layers of a network . They are commonly deployed in enterprise backbones, data centers, and large campus networks to handle high traffic loads and ensure efficient data flow . Key functions include:

• Link Aggregation: Combining multiple physical ports into a single logical link to increase bandwidth and provide failover capability .
• Routing and Forwarding: Managing traffic between VLANs and subnets.
• Traffic Control and QoS: Prioritizing critical data such as voice or video streams.
• Redundancy and Reliability: Ensuring continuous network operation even if a link fails.
• Security and Access Control: Filtering traffic and implementing network policies .

Supported Aggregation Protocols

Most aggregation switches support:

• LACP (Link Aggregation Control Protocol, IEEE 802.3ad): Dynamically manages aggregated links, provides automatic failover, and prevents misconfigurations .
• Static Link Aggregation: Manually configured aggregation, less flexible and prone to errors.
• MC-LAG (Multi-Chassis Link Aggregation Group): Allows two switches to operate as a single logical unit for load balancing and redundancy .

Examples of Aggregation Switches

• Grandstream GWN7830 Series: Layer 3 aggregation switches with up to 24 SFP ports and 12 SFP+ ports, supporting advanced VLAN, QoS, IGMP/MLD snooping, and comprehensive security features .
• Ubiquiti UniFi Switches: Most UniFi switches support aggregation except models like USW-Flex, USW-Flex-Mini, and USW-Ultra. Aggregation is supported for switch-to-switch and switch-to-client scenarios, with LACP recommended for dynamic link management .

Use Cases

1. Switch-to-Switch Aggregation: Increases bandwidth between switches and ensures redundancy for high-traffic environments .
2. Switch-to-Client Aggregation: Provides higher throughput for servers or high-performance devices that require more bandwidth than a single port can deliver .

Considerations

• Ensure ports are sequential when configuring aggregation.
• Use SFP+ or high-speed fiber for uplinks to maximize throughput.
• Verify that connected devices support aggregation protocols to avoid misconfigurations.
• For large networks, MC-LAG can provide enhanced resilience and load balancing . Aggregation switches are essential for building scalable, high-performance, and reliable networks, particularly in environments with heavy traffic or critical applications.