Ethernet Backhaul Can Improve Mesh Wi-Fi, With Cabling Caveats

Mesh systems automatically create a wireless backhaul, the link that moves data between routers rather than directly to devices. That default saves setup work, but Engadget said signal loss over distance lowers bitrates and can cut performance by hundreds of megabits. Devices connecting to the mesh are also limited by the bandwidth of the nearest node.

Cheaper mesh systems can make the problem worse by sharing wireless backhaul bands with the bands used by client devices, forcing both parts of the network to compete for the same capacity. Engadget advised against buying dual-band mesh products for that reason. Systems with a dedicated backhaul link are at least tri-band, and more advanced models can be quad-band, according to the report.

An Ethernet backhaul addresses both issues, Engadget reported. Once routers are wired together, a mesh system's dual-band or tri-band design matters less, and Ethernet loses little speed over typical home distances. With Cat 6 cable, the wired link will probably deliver at least 1 Gbps and possibly more, the report said. Wi-Fi devices may see only a portion of that bandwidth, but they are not limited before they connect.

The main obstacle is installing cable. Even apartment residents may need a few dozen feet, and the job grows in a two- or three-story house, according to Engadget. A pair of 50-foot Cat 6 cables costs about $30, but concealing wires can become a serious project. If existing Wi-Fi speeds are already adequate, a wired backhaul may not justify the time, money or effort, the report said.

Compatibility is another requirement. Each router needs at least one free Ethernet port, and users may want to reserve ports for a laptop or smart home hub. An Ethernet switch can provide more ports, but it adds cost. Engadget also said users should check port speed: 100 Mbps is too slow, and even 1 Gbps can feel subpar for a Wi-Fi 7 system with a dedicated wireless backhaul, because Wi-Fi devices might reach multi-gig speeds. The report said 2.5 or 10 Gbps Ethernet is preferable when available.

The recommendation applies to users seeking maximum mesh performance, not every household. Engadget said standalone routers can still work and may be better in some cases, such as moving smart home accessories to the slower but longer-reaching 2.4GHz band. Mesh systems, however, remove dead zones and keep speeds more consistent, which the report described as often more important day to day. The report also said router placement matters, since putting a router in a closet or behind a barrier hampers signals.