Exact model-family answer directory

Ubiquiti UniFi Switch Pro Max 24 PoE troubleshooting

Ubiquiti UniFi Switch Pro Max 24 PoE (USW-Pro-Max-24-PoE): ports (from Ubiquiti's tech specs); poE budget; capacity, and a fix for each symptom below.

Ports (from Ubiquiti's tech specs)
Eight 2.5 GbE PoE++ ports, sixteen 1 GbE ports (eight PoE+ and eight PoE++) and two 10G SFP+ ports.

No internetWi-Fi dropsSlow Wi-FiDead zonesDevice won't connectSetup

Part of Ubiquiti network model troubleshooting guide

Reviewed records

2 exact answers

Diagnose the exact device problem

Ubiquiti · 100 Mbps

Ubiquiti UniFi Switch Pro Max 24 PoE Ethernet link is limited to 100 Mbps or disconnects

Open record Ubiquiti · restarts

Ubiquiti UniFi Switch Pro Max 24 PoE restarts, freezes or overheats

Open record

Confirm the model first

Which units this covers, and how to tell yours is one of them

Model numbers and patterns: USW-Pro-Max-24-PoE

Published specification

What is true of this model and changes how you fix it

Official specifications
16 Gigabit ports (8 PoE+, 8 PoE++) plus 8 additional 2.5GbE PoE++ ports and 2 10G SFP+ uplinks — 26 ports total. 112Gbps switching capacity, 56Gbps non-blocking throughput. 400W total PoE budget, up to 60W per port (PoE++). Rack-mount 1U, 442 x 325 x 44mm, 5.1kg.
Type — managed PoE SWITCH (no Wi-Fi, no routing)
This is a 24-port managed network SWITCH with PoE — it has NO Wi-Fi radio and does NOT act as your internet router/gateway. So Wi-Fi symptoms and router-only symptoms (router setup, NAT, DNS, port forwarding, VPN) do not apply; a switch's job is wired connectivity and powering PoE devices (APs, cameras).
PoE budget
It supplies PoE to connected devices up to a total power budget — if powered devices (APs/cameras) drop when several draw at once, the switch may be over its PoE budget. That is its main relevant fault mode, along with a bad cable/port or firmware.
UniFi controller/app
Managed in the UniFi Network application (VLANs, port profiles, PoE control). It carries traffic and power; it does not create the network or the Wi-Fi.
PoE budget
400 W in total, with the 2.5 GbE PoE++ ports giving up to 60 W each. The unit uses an internal 550 W AC/DC supply on 100-240 V input, and has two power ports rated up to 450 W each.
Capacity
112 Gb/s switching (56 Gb/s non-blocking) with Layer 3 features, in a half-depth 1U case with front-to-rear airflow.

Where these figures were read. techspecs.ui.com/unifi/switching/usw-pro-max-24-poe (UniFi Pro Max 24 PoE - Tech Specs)

Manufacturer support for this product line. Ubiquiti Help Center — UniFi help. Official UniFi gateway, switching, Wi-Fi and controller documentation.

Also read for this model. Ubiquiti — UniFi Pro Max 24 PoE tech specs; Getic — Ubiquiti UniFi Switch Pro Max 24 PoE.

Exact questions

Questions that only have an answer for the Ubiquiti UniFi Switch Pro Max 24 PoE

My UniFi Switch Pro Max PoE devices keep dropping.+

The most likely cause on a PoE switch is the power budget — every PoE device (access points, cameras) draws from a shared wattage total, and if the sum exceeds the switch's PoE budget, devices drop or fail to power up when several draw at once. Add up the PoE draw versus the switch's budget in the UniFi Network application and reduce load or use higher-budget power. Otherwise a dropping device is a cable/port or firmware issue. The switch has no Wi-Fi and does no routing, so those are not factors.