Glossary / NAS

Link Aggregation

Link aggregation combines multiple network connections into one logical link, potentially increasing combined bandwidth or providing resilience. Actual behavior depends on the NAS and network equipment.

What link aggregation means

Link aggregation is a networking capability that combines two or more physical network connections into one logical connection. On a NAS, this can help distribute traffic across available links or maintain connectivity if a link fails, depending on the aggregation method and the rest of the network.

A product page marked Link aggregation: Yes confirms that the NAS supports the feature. It does not, by itself, indicate a particular speed increase, reliability level, aggregation standard, or configuration.

Why NASFit buyers may care

Link aggregation is most relevant when a NAS serves multiple users, computers, virtual machines, or other network clients at the same time. Multiple active connections may be able to share the available network capacity, subject to the NAS, switch, cables, configuration, and client traffic.

It may matter less for a single client performing one transfer. Link aggregation does not automatically make every individual connection faster, and the capability may require compatible network equipment and a supported setup.

On NASFit, the catalog includes many published products with a positive link-aggregation flag, while a smaller number are marked as not supporting it. Treat that flag as a capability indicator rather than a performance rating.

What the label does not tell you

The label does not specify:

How many network ports are available
The speed of each port
Which aggregation standard or operating modes are supported
Whether a compatible switch is required
How traffic is distributed between links
Whether one client can use the combined capacity
What happens if a cable, port, or switch connection fails

These details remain unknown unless the product page or manufacturer documentation states them. A related protocol listing such as TCP/IP, IPv4, IPv6, UPnP Discovery, Bonjour Discovery, or SNMP v2 describes network support, but it does not establish the performance or implementation details of link aggregation.

What to check on a product page

Look for the exact link-aggregation status and any accompanying details about supported modes, port count, port speeds, switch requirements, and failover behavior. If those details are absent, do not infer them from a simple Yes value.

Also distinguish Link Aggregation from general network connectivity. A NAS can support common networking protocols without supporting link aggregation, and supporting link aggregation does not by itself describe the quality of the NAS's network hardware.