How to avoid IP address conflict

Written by rick harris
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How to avoid IP address conflict
Routers allows mutiple computers to share a network; however, IP address conflicts can become an issue with more devices. (network image by Allyson Ricketts from

Installing a network can bring a lot of freedom to the home or workplace. However, installing the network properly can prevent issues from arising in the future. Home networks often will often use DHCP to assign IP addresses from the router once the computer connects. If a computer already on the network is in sleep mode, the IP address assigned to that computer could be reassigned by DHCP. A few extra steps for set-up will help to avoid IP conflicts in the future.

Skill level:

Things you need

  • Network administrator access
  • Router ID and password
  • Computer with network access

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  1. 1

    Assign a static IP range to be used on the network and give the range room to handle the growth of the network. Static IP addresses should only be used for computers that will remain on the network for their entire use. Track what IP addresses have been assigned in order to avoiding assigning the same address to two devices. Laptops that are taken off-site should not have assigned static IP addresses.

  2. 2

    Set the range for DHCP range outside of those that will be used for Static IP. For example, if the static IP range is to, then start the DHCP range at This will ensure that IP address conflicts do not occur with static IP computers.

  3. 3

    Disable the sleep mode within the power settings to prevent the computer from going to sleep automatically. Encourage users to use the hibernate mode instead as this disconnects the computer from the network. Once the computer is turned back on, it will obtain a new address through the DHCP.

Tips and warnings

  • These steps will address the most common causes of IP address conflicts; however, not all IP address conflicts can be avoided.

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