How to Configure 2 IP Addresses

There are multiple occasions for which you may need two IPv4 addresses. This video from Tony Fortunato explains how to configure them.

Tony Fortunato

August 8, 2018

1 Min Read
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I have encountered many situations where I needed two IPv4 addresses on my Microsoft computer:

  • Firmware or software updates put the equipment back to default settings

  • Remote equipment required a factory reset either physically or via software

  • Power flickering off and on repeatedly put the gear back to factory resets

If you are fortunate enough, you can simply access the equipment, physically connect to it, and reconfigure or restore the last configuration.

But what do you do if the equipment is in a locked facility or up on a tower or if you are working remotely?

That’s where this tip comes in. By configuring two IP addresses on a computer, I can connect to it, that is, if I am on the same subnet or VLAN. That way I have the best of both worlds — my regular IP address to access the internet or email and an IP address in the same subnet as the factory IP address.

If you are working off-site or using VPN to access that network, here’s another tip. I ask the client to provide a computer that we can access with whatever remote desktop solution they use and ensure it is on the same subnet as the equipment. Then I add another IP address to it, and I’m good to go.

The trickiest part of this exercise is ensuring that the IP address you use is not already in use because pinging that address might not be a good verification method. If a firewall is enabled, that system will probably block pings.

About the Author(s)

Tony Fortunato

Sr Network Performance Specialist

Tony Fortunato is a network performance expert who has been designing, implementing and troubleshooting networks since 1989. His company, The Technology Firm, provides clients of all sizes with services ranging from project management, network design, consulting, troubleshooting, designing custom-designed training courses, and assisting with equipment installation. Tony's experience in networking started with financial trading floor networks and ISPs, where he learned to integrate and support equipment from various vendors. Tony has taught and presented at numerous colleges and universities, public forums and private classes. He blogs frequently at NetworkDataPediaand has a popular YouTube channel.

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