NETGEAR M4250-40G8XF-PoE++: rear panel, ports and setup guide
The M4250-40G8XF-PoE++ is a 2U AV switch with 40 gigabit Ultra90 PoE++ ports at up to 90 W each, eight 10G SFP+ uplinks and three built-in power supplies. Click any port on the rear panel below to see what it does, then read on for PoE budgets, power and specs.
- 2U rackmount
- 40 x 1G Ultra90 PoE++
- 8 x SFP+
- Up to 2,880 W PoE
- 240 Gbps fabric
- 22.72 lb
M4250-40G8XF-PoE++ specifications
| Model | NETGEAR M4250-40G8XF-PoE++ (GSM4248UX) |
| Form factor | 2U rackmount, ports on the rear (reversible mounting) |
| Copper ports | 40 x 10/100/1000BASE-T RJ45, all Ultra90 PoE++ (802.3bt up to 90 W) |
| Uplinks | 8 x 1000/10GBASE-X SFP+ |
| PoE budget | 720 W (1 PSU), 1,650 W (2 PSU), 2,880 W (3 PSU) |
| Switching fabric | 240 Gbps non-blocking across 48 ports |
| Management ports | RJ45 RS232 and USB-C console, 1G out-of-band Ethernet (rear); USB-A storage (front) |
| Power | 3 internal fixed PSUs (C14 inlets) with built-in RPS/EPS, one on/off switch |
| CPU and memory | Quad-core ARMv8 1.8 GHz, 2 GB RAM, 256 MB flash (dual firmware) |
| Dimensions (W x H x D) | 440 x 86.4 x 350 mm (17.3 x 3.4 x 13.8 in.) |
| Weight | 10.28 kg (22.72 lb) |
| Heat dissipation | Up to 3,523 W (12,028 BTU/hr) with three PSUs at full PoE load; 82.6 W without PoE |
| Fans | No fan-off mode. Quiet mode from about 30 dBA at light PoE load, Cool mode 71 dBA |
| MTBF | 304,916 hours at 25 C |
| Operating temperature | 32 to 113 F (0 to 45 C), up to 90% humidity, 10,000 ft |
Every port on the rear panel, explained
Click a card to light up those ports on the panel above.
40 Ultra90 PoE++ ports40 on the panel
Gigabit RJ45 ports in five blocks of eight. Odd numbers are on the top row and even numbers on the bottom, counting left to right (ports 1 to 40).
Every port supports 802.3bt Ultra90 PoE++ at up to 90 W, so it can power PTZ cameras, displays and other high-draw AV gear, and it stays compatible with 15.4 W and 30 W devices.
8 SFP+ uplinks8 on the panel
Ports 41 to 48 on the right, in two rows of four. Each takes a 1G or 10G SFP+ module for links to other switches or a core.
Use 10G uplinks when you run video over IP at scale across several switches.
RJ45 console1 on the panel
The upper RJ45 next to the status lights is an RS232 straight-through serial console for local CLI access.
Out-of-band management1 on the panel
The lower RJ45 (OOB) is a dedicated 1G service port. Patch it to a separate management network so you can reach the switch even if the AV VLANs are down.
USB-C console1 on the panel
A USB-C console port under the status lights, an alternative to the RJ45 console when you plug in a laptop. The USB-A storage port is on the front display panel.
Power inlets3 on the panel
Three C14 inlets feed three internal power supplies, with one on/off switch for the whole switch. Connect one, two or three cords depending on how much PoE you need.
On the front
- A black display panel with power, fan and PoE status LEDs
- A USB-A storage port for logs, configs and firmware
- Port status LEDs, so you can check links from the front of the rack
M4250-40G8XF-PoE++ power supplies and PoE budget
The switch has three internal, fixed power supplies with built-in redundant and extended power (RPS/EPS). The PoE budget grows with each supply you connect.
| Supplies connected | PoE budget | Max draw (full PoE) |
|---|---|---|
| 1 | 720 W | 912 W |
| 2 | 1,650 W | 1,998 W |
| 3 | 2,880 W | 3,523 W |
Example: 40 ports at 72 W each need 2,880 W, which takes all three supplies. Spread the cords across separate circuits.
At full load this switch puts out over 12,000 BTU per hour. Make sure the rack has the cooling to match, and remember the fans can't be switched off on this model.
M4250-40G8XF-PoE++ fans and airflow
Air flows side to side, so leave the sides of the switch clear in the rack.
Fan-off mode isn't supported on this model. Quiet mode starts around 30 dBA at light PoE loads; Cool mode runs the fans at full speed (71 dBA).
Compare the M4250 series
One datasheet covers 13 M4250 models. They share the same software, AV profiles and management ports, and differ in size, port mix and PoE budget.
| Model | Form factor | Copper ports | Uplinks | PoE budget |
|---|---|---|---|---|
| M4250-9G1F-PoE+ | Desktop | 8 x 1G PoE+, 1 x 1G | 1 x SFP (1G) | 110 W |
| M4250-8G2XF-PoE+ | Desktop | 8 x 1G PoE+ | 2 x SFP+ (1G/10G) | 220 W |
| M4250-10G2F-PoE+ | 1U | 8 x 1G PoE+, 2 x 1G | 2 x SFP (1G) | 125 W |
| M4250-10G2XF-PoE+ | 1U | 8 x 1G PoE+, 2 x 1G | 2 x SFP+ (1G/10G) | 240 W |
| M4250-10G2XF-PoE++ | 1U | 8 x 1G PoE++, 2 x 1G | 2 x SFP+ (1G/10G) | 720 W |
| M4250-26G4F-PoE+ | 1U | 24 x 1G PoE+, 2 x 1G | 4 x SFP (1G) | 300 W |
| M4250-26G4F-PoE++ | 1U | 24 x 1G PoE++, 2 x 1G | 4 x SFP (1G) | 720 W (1 PSU), 1,440 W (2 PSU) |
| M4250-26G4XF-PoE+ | 1U | 24 x 1G PoE+, 2 x 1G | 4 x SFP+ (1G/10G) | 480 W |
| M4250-40G8F-PoE+ | 1U | 40 x 1G PoE+ | 8 x SFP (1G) | 480 W |
| M4250-40G8XF-PoE+ | 1U | 40 x 1G PoE+ | 8 x SFP+ (1G/10G) | 960 W |
| M4250-40G8XF-PoE++ | 2U | 40 x 1G PoE++ | 8 x SFP+ (1G/10G) | 720 W to 2,880 W (1 to 3 PSU) |
| M4250-12M2XF | 1U | 12 x 100M/1G/2.5G | 2 x SFP+ (1G/10G) | None |
| M4250-16XF | 1U | None | 16 x SFP+ (10G; first 12 also 1G) | None |
M4250 AV profiles and the AV web interface
Every M4250 ships pre-configured for audio and video over IP, so encoders and decoders can be plugged in and work without setup. IGMP Plus is on by default on VLAN 1, which keeps multicast video from flooding the network.
- AV web interface: browse to the switch's IP address on port 8080 for the AV-specific settings. The regular IT web interface and a CLI are there too.
- Audio profiles: Dante, Q-SYS, AES67 and AVB are built in.
- Video profiles: NVX, AMX, Q-SYS, NDI, Kramer KDS, Aurora Multimedia, ZeeVee, Atlona, Dante, SDVoE and more, plus mixed audio, video and control profiles. Profiles are color coded and applied per port.
- Switch-to-switch links: with Auto-Trunk and Auto-LAG, two M4250s connected together trunk their VLANs and bundle multiple links automatically.
- Fleet management: the NETGEAR Engage controller manages M4250, M4300, M4350 and M4500 switches together.
M4250 management ports
All M4250 models share the same set of management ports, though where they sit (front or back) depends on the model.
- Console: an RJ45 RS232 straight-through serial port and a USB-C console port, for local CLI access.
- Out-of-band Ethernet: a 1G service port for a separate management network.
- USB-A storage: for logs, packet captures, configuration files and firmware images.
- Dual firmware: two firmware images and two configuration files, so updates cause minimal downtime.
Mounting and fan modes
- Rackmount models can be mounted reversed when you want the ports facing the front of the rack. A second, included pair of ears sets the switch back 2 in. (about 5 cm) to leave room for cables.
- Threaded holes underneath (4 x M5 on a 50 x 100 mm VESA pattern) and on the front (1 x M10 for clamps) allow mounting outside a rack.
- Desktop models are meant for conference rooms, mobile studios, under a table or behind a screen, and mount with side flanges.
- Fans are software controlled. Most models can switch the fans off entirely when the room temperature and PoE load are low enough, and offer Quiet and Cool modes otherwise. The M4250-9G1F-PoE+ is fanless.
Fan-off mode depends on ambient temperature and PoE load. Check your model's limits before closing it inside a cabinet or ceiling space.
Frequently asked questions
What is the PoE budget of the M4250-40G8XF-PoE++?+
720 W with one power supply connected, 1,650 W with two and 2,880 W with all three, shared across 40 Ultra90 PoE++ ports.
How many watts can each port deliver on the M4250-40G8XF-PoE++?+
Up to 90 W per port with 802.3bt Ultra90 PoE++, and it also powers 15.4 W and 30 W devices.
How many power cords does the M4250-40G8XF-PoE++ need?+
It has three C14 inlets. One cord runs the switch; connect two or three to raise the PoE budget and add redundancy.
How big is the M4250-40G8XF-PoE++?+
2U, 440 mm wide and 350 mm deep, weighing 10.28 kg (22.72 lb).
How do I open the M4250 AV interface?+
Browse to the switch's IP address followed by :8080. The standard IT web interface is on the normal port.
Which audio protocols do M4250 switches support out of the box?+
Dante, Q-SYS, AES67 and AVB profiles are built in, and AVB supports up to 256 streams per switch.
Can the M4250 run with its fans off?+
Yes on most models, when the ambient temperature and PoE load are low enough. The switch also has Quiet and Cool fan modes, and the M4250-9G1F-PoE+ has no fans at all.
Plan this av network switch in your rack
The M4250-40G8XF-PoE++ is in the Netgear library for DaMatrix, with every port mapped so you can drag it into a rack, patch it and print the documentation.
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Summarized from the NETGEAR M4250 Series AV Line Managed Switches Datasheet. This page is a quick reference; check the full manual for safety warnings and model-specific limits.