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Home > Success Center > Network Topology Mapper (NTM) > Network Topology Mapper (NTM) Documentation > NTM Administrator Guide > What is SolarWinds Network Topology Mapper

What is SolarWinds Network Topology Mapper

Table of contents

Updated: April 10, 2017

SolarWinds Network Topology Mapper (NTM) shows nodes on your network, indicates and updates status both for the nodes and the network connections between them in interrelated, scalable maps with customizable icons.


NTM’s topological overview complements your network monitoring system (SolarWinds Network Performance Monitor (NPM), by showing how an issue with a particular node impacts larger aspects your network. While NPM lists alerts in order or urgency, NTM distributes alerts on a map that clearly indicates, for example, that a particular switch sits in the path of all other alerting nodes.

How NTM Works

NTM uses the following protocolso to discover network nodes and the connectivity between them:

  • Simple Network Management Protocol (SNMP)
  • Windows Management Instrumentation (WMI)
  • Link Layer Discovery Protocol (LLDP)
  • Cisco Discovery Protocol
  • VMware Management
  • Internetwork Control Message Protocol (ICMP ping)

SNMP interrogates several device MIBs, including:

  • MIB2:sysInfo
  • IF MIB
  • Cisco MIB

NTM cannot poll the ipRouteTable MIB for Cisco devices running on IOS release 12.4(13b) and later releases.

After node detail and connectivity data is retrieved from nodes, NTM uses bridge table information if you chose that option in Discovery Settings.

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