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A network switch mapping solution for Windows®

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Switch Port Mapping Tool > Support > Getting Started

The purpose of this page is to help you get started using the Switch Port Mapping Tool.

Getting Started with the Managed Switch Port Mapping Tool.

This procedure is found in greater detail in the program's help file. Please refer to it by pressing the F1 key from within the program. Locate the Getting Started section in the help file index.

Entering the target switch information

Please press Settings in the Switch Group. Then enter the IPv4 address of the switch in the IP Address field. Select the SNMP version you wish to use and enter the credentials (community name or press the SNMP v3 Settings button to define the SNMPv3 credentials).

Entering other required information

The switch will return information about the devices connected to its ports, but it returns only MAC addresses. We have to query other devices to obtain the IPv4 addresses associated with those MAC addresses by getting the ARP tables.

1. We can query two other devices via SNMP for their ARP tables. These ARP tables may contain the associations we are looking for. A good place to start is with a router. Enter the IP address, then the community name for each device. Leave the fields blank if you do not have other devices to query.

2. We recommend leaving 'Query Switch ARP Table' and 'Query Local ARP Table' checked because the switch or your computer may have the IP to MAC associations we are looking for. We also recommend leaving Enable Ping Sweep checked -- please verify the IP range in Setup and make sure that Query Local ARP Table is checked.

3. If you want the IP addresses resolved to hostnames, check the 'Resolve IPs to Hostnames' checkbox.

Running the switch query

Press Map Ports to begin the process. Once complete the Map Ports and Settings buttons will no longer be 'grayed out' and a report will be launched for viewing in your default web browser. You can right click within the results grid to see additional options like printing.


  • If you get no response from the switch, you will see no rows or columns populated in the grid and a timeout message will appear. Check to make sure the switch has SNMP enabled and verify that the access credentials you have for reading information from the switch is correct. If your switch has a permitted IP list, you may need to add your IP address to that list. Make sure your personal firewall is allowing UDP traffic on port 161 to travel BOTH ways.
  • You are not seeing IP addresses associated with the MAC addresses. You need to put a device like a file server or router (running SNMP) into the Primary or Secondary so you can access the device's ARP table. This table is required to map MAC addresses to IP addresses.
  • If you have a Cisco switch and you are using SNMPv1 or v2c and get nothing but an error at the beginning of the mapping, use CLI and do enable, followed by snmp-server community public to allow SNMPv1/v2c to be used with the community name 'public'.
  • If you have a Dell switch and the MAC address/IP address/Hostname/Interface columns are blank, you probably have an older switch operating system that needs to be updated from Dell's support website.