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NNM Hardware Requirements

Enterprise networks can vary in performance, capacity, protocols, and overall activity. Resource requirements to consider for NNM deployments include raw network speed, the size of the network being monitored, and the configuration of NNM.

The following chart outlines some basic hardware requirements for operating NNM:

Scenario Minimum Recommended Hardware
Nessus Network Monitor managing up to 50,000 hosts * (**)

CPU: 1 dual-core 2GHz CPU

Memory: 2 GB RAM (4 GB RAM recommended)

Nessus Network Monitor managing more than 50,000 hosts **

CPU: 1 dual-core 3 GHz CPU (2 dual-core recommended)

Memory: 4 GB RAM (8 GB RAM recommended)

Nessus Network Monitor running in High Performance mode

CPU: 10 CPUs, with hyper-threading enabled

Memory: 16 GB RAM

HugePages memory: 2 GB

*The ability to monitor a given number of hosts depends on the bandwidth, memory, and processor power available to the system running NNM.

**For optimal data collection, NNM needs to be connected to the network segment via a hub, spanned port, or network tap to have a full, continuous view of the network traffic.

Note: Please research your VM software vendor for comparative recommendations, as VMs typically see up to a 30% loss in efficiency compared with dedicated servers.

Processor requirements will increase with greater throughput and higher number of network interfaces. Memory requirements will increase for networks with more hosts. The requirements for both of these components are affected by configurable options, like setting a long report lifetime.

Disk space requirements for NNM vary depending on the amount of data and length of time that data is stored on the system.

High Performance Mode

To run NNM in High Performance mode, a minimum of two of the following types of Intel NICs are required; one as a management interface and at least one as a monitoring interface:

  • e1000 (82540, 82545, 82546)

  • e1000e (82571. 82574, 82583, ICH8..ICH10, PCH..PCH2)

  • igb (82575..82576, 82580, I210, I211, I350, I354, DH89xx)

  • ixgbe (82598..82599, X540, X550)

  • i40e (X710, XL710)

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