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Black rectangular Netgear Nighthawk CM2500 cable modem with two Ethernet ports

Netgear Inc.

Netgear Inc. Nighthawk CM2500-100NAS DOCSIS 3.1 2Gbps Cable Modem

SKU CH-J4V4-23DVS MPN CM2500-100NAS

DOCSIS 3.1 cable modem delivers up to 2Gbps download and 1Gbps upload using mid/high-split technology with two 1Gbps Ethernet ports for link aggregation

  • TypeCable Modem
  • Ethernet Ports2 x 1 Gbps
  • StandardsDOCSIS 3.1
  • Wi-Fi GenerationWiFi 6E or WiFi7
  • Max Transmission Rate32 downstream and 8 upstream SC-QAM channels 2 OFDM Downstre
  • FeaturesTechnical Specifications: 32 downstream and 8 upstream SC-QA

Model CM2500

  • DOCSIS 3.1 mid/high-split unlocks the fastest cable internet tiers available
  • Up to 2 Gbps download and 1 Gbps upload for high-capacity home networking
  • Two 1 Gbps Ethernet ports enable link aggregation with a compatible router
  • 32 downstream and 8 upstream SC-QAM channels plus 2 OFDM and 2 OFDMA channels
  • Pairs with WiFi 6E or WiFi7 routers and Orbi systems for whole-home coverage

Nighthawk CM2500 cable modem

The Netgear Nighthawk CM2500 is a DOCSIS 3.1 cable modem built for households that need multi-gigabit internet performance. It supports downstream speeds up to 2Gbps and upstream speeds up to 1Gbps when paired with a compatible router using link aggregation.

DOCSIS 3.1 mid/high-split limits

The modem uses 32 downstream and 8 upstream SC-QAM channels plus 2 OFDM downstream and 2 OFDMA upstream channels to reach its rated throughput. Actual speeds depend on the cable provider's plant and the subscription tier, so the 2Gbps ceiling is only available where the operator has deployed mid/high-split spectrum.

Two 1Gbps Ethernet ports and router pairing

Dual Gigabit Ethernet ports allow link aggregation to a router that supports the feature, unlocking the full 2Gbps pipe for the local network. The unit includes an Ethernet cable and power adapter, and Netgear highlights pairing with WiFi 6E or WiFi 7 routers or Orbi systems for wireless distribution.

Highlights

  • DOCSIS 3.1 mid/high-split unlocks the fastest cable internet tiers available
  • Up to 2 Gbps download and 1 Gbps upload for high-capacity home networking
  • Two 1 Gbps Ethernet ports enable link aggregation with a compatible router
  • 32 downstream and 8 upstream SC-QAM channels plus 2 OFDM and 2 OFDMA channels
  • Pairs with WiFi 6E or WiFi7 routers and Orbi systems for whole-home coverage

Specifications

BrandNETGEAR
SeriesNighthawk
ModelCM2500-100NAS
TypeCable Modem
Ethernet Ports2 x 1 Gbps
StandardsDOCSIS 3.1
Wi-Fi GenerationWiFi 6E or WiFi7
Max Transmission Rate32 downstream and 8 upstream SC-QAM channels
2 OFDM Downstream channels and 2 OFDMA Upstream channels
FeaturesTechnical Specifications:
32 downstream and 8 upstream SC-QAM channels
2 OFDM Downstream channels and 2 OFDMA Upstream channels
DOCSIS® Quality of Service (QoS)
Two (2) LAN 1Gbps Gigabit Ethernet ports with support for link aggregation
One (1) WAN coaxial cable connection
IPv6 next-generation internet addressing support
System Requirements:
Cable broadband internet service
Please check your cable Internet service provider web site for data speed tier compatibility and to ensure it provides
DOCSIS® 3.1 service, otherwise this modem will only work as a DOCSIS® 3.0 modem
Not compatible
Package ContentsNighthawk® Mid/High-Split 2Gbps Internet Speed Cable Modem (CM2500)
One (1) Ethernet cable
Power adapter
Quick start guide
Shipping weight1.11 kg
Package size250 × 220 × 114 mm

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Questions about this item

Which Nighthawk CM2500 version should I choose for a plan above 1 Gbps?

The CM2500-100NAS is the single model offered; it delivers up to 2 Gbps downstream and 1 Gbps upstream when your ISP provisions a mid/high-split DOCSIS 3.1 tier.

What does the 2 Gbps headline speed mean once the modem is installed?

It is the combined throughput you can reach by linking both 1 Gbps Ethernet ports to a router that supports link aggregation; a single port caps at 1 Gbps.

How does the DOCSIS 3.1 mid/high-split standard cap real-world performance?

The spec provides 32 SC-QAM downstream and 8 upstream channels plus 2 OFDM downstream and 2 OFDMA upstream channels, giving roughly 20 percent more usable spectrum than older splits.

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