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Black rack-mount network switch with front status panel and rear ports

Netgear Inc.

Netgear Inc. GSM4212UX-100NAS 12-port managed network switch

SKU CH-3H71-8DAF4 MPN GSM4212UX-100NAS

A 12-port managed switch with eight 1G PoE++ ports, two 1G RJ45 ports and two 10G SFP+ uplinks

  • Product formatRackmount
  • Management typeManaged
  • Main ports8 x RJ45 + 4 x SFP
  • Main port speed10/100/1000 Mbit/s + 10 Gbit/s
  • Main port type8 × 10/100/1000BASE-T (RJ45) Ultra90 PoE++ with 720 W PoE bu
  • MAC table size16K
  • 8 × 1 Gbps Ultra90 PoE++ ports deliver 720 W total power budget
  • 2 × 10 Gbps SFP+ uplinks provide high-speed fiber connectivity
  • Managed Layer 2 and Layer 3 switching with static, RIP and PIM routing
  • Selectable fan modes enable fanless, quiet or cool operation
  • Dedicated AV web GUI with profiles for Dante, Q-SYS, AES67, NVX, NDI and more

12-Port Managed AV Switch

The Netgear GSM4212UX-100NAS is a 12-port managed switch built for professional AV over IP installations. It provides eight Ultra90 PoE++ ports with a 720W budget alongside two 1G RJ45 ports and two 10G SFP+ uplinks. The unit targets integrators deploying Dante, Q-SYS, NDI or similar AV profiles in rack environments.

Replacing Unmanaged or Lower-Power Switches

This model replaces unmanaged switches or PoE+ units that cannot deliver 90W per port or 10G uplinks. The jump is justified when endpoints need 802.3bt Class 8 power or when 10G fibre links are required between switches. It also supersedes earlier M4250 variants lacking the 720W PoE budget or reversed mounting flexibility. Buyers without high-power endpoints or 10G backbone needs gain no advantage.

Rackmount Install with Reversed Mounting Option

The switch fits a standard 1U rack space at 17.32" x 10.12" x 1.70" and weighs 8.44 lbs. It supports standard or recessed mounting with all ports facing front or back for clean cable routing. Selectable fan modes allow fanless, quiet or cool operation depending on thermal conditions. Common issues include forgetting to purchase the separate AVB licence for AVB services and exceeding the 720W total PoE budget when loading all eight Ultra90 ports.

How it compares

Measured against everything we stock in Ethernet & PoE Switches, at today’s prices. Recalculated every night.

Price $1,134.99
Pricier than about 67% of the 2,759 comparable items (median $482.99).

Specifications

Product
Brand nameNETGEAR
Part numberGSM4212UX-100NAS
Memory
Buffer size16 MB
Connectivity
Management typeManaged
Main port speed10/100/1000 Mbit/s + 10 Gbit/s
MAC table size16K
VLAN capability4K VLANs
Jumbo frame support12 KB
Ports & slots
Main ports8 x RJ45 + 4 x SFP
Main port type8 × 10/100/1000BASE-T (RJ45) Ultra90 PoE++ with 720 W PoE budget
2 × 10/100/1000BASE-T (RJ45)
2 × 1000/10GBASE-X (SFP+)
Power
Power over EthernetYes
Size & build
Product dimensions17.32 in × 10.12 in × 1.7 in
Product weight8.44 lb (3.83 kg)
Shipping weight4.99 kg
Package size508 × 330 × 127 mm
More details
Product formatRackmount
Indicator lightsPower LED
PoE Max LED (PoE models)
Fan LED
Port LEDs

Questions about this item

How deep is the rackmount chassis so I can confirm it fits my cabinet?

The unit measures 17.32 inches deep, 10.12 inches wide and 1.70 inches high, weighing 8.44 lbs.

Which ports must be used for the 10 Gbps uplinks during initial setup?

Use the two SFP+ slots on the rear for 10G fiber uplinks; the eight RJ45 ports are 1 Gbps PoE++ and the two extra RJ45 ports are 1 Gbps non-PoE.

When do the internal fans need cleaning or replacement?

Selectable fan modes include a fanless option; if active cooling is enabled, inspect and clean the fans during routine rack maintenance.

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