Tenable Core + Nessus Network Monitor
To install and run Tenable Core + Nessus Network Monitor, your system must meet requirements established for NNM and Tenable Core.
NNM — see below
Tenable Core — see the Tenable Core + Nessus Network Monitor User Guide
Tenable Core + Nessus Network Monitor 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:
|Version||Installation scenario||RAM||Processor||Hard Disk|
|All Versions||NNM managing up to 50,000 hosts * (**)||2 GB RAM (4 GB RAM recommended)||2 2GHz cores||20 GB HDD minimum|
|NNM managing more than 50,000 hosts **||4 GB RAM (8 GB RAM recommended)||4 2GHz cores||20 GB HDD minimum|
|NNM running in High Performance mode||16 GB RAM (HugePages memory: 2 GB)||10 2GHz cores with hyper-threading enabled||20 GB HDD minimum|
*The ability to monitor a given number of hosts depends on the bandwidth, memory, and processing power available to the system running NNM.
**For optimal data collection, NNM must be connected to the network segment via a hub, spanned port, or network tap to have a full, continuous view of network traffic.
Note: Research your VM software vendor for comparative recommendations, as VMs typically see up to a 30% loss in efficiency compared to dedicated servers. NNM supports VMware's vmxnet3 driver.
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)