Troubleshoot IP pool issues in NSX

First, let’s reference Creating IP Pools in NSX. The only configuration of an IP Pool is the Name, Gateway, Prefix Length, DNS, and Static IP Pool as shown below. The first thing to confirm, is that you have the gateway, prefix length, and IP Pool settings correct.
If everything looks good, ensure that there are enough IPs in the pool. If you look at my configuration below, you will see that my VXLAN pool has used all 4 IPs in the pool.
If you click the used link you will see what IPs are allocated.
If I tried to install another host and configure VXLAN, I would get an error about insufficient IPs in my pool. Ensure that the pool is big enough, and if it needs more IPs, you can edit the pool by clicking the penil icon and increase the pool.


  1. Yves -  December 3, 2015 - 4:55 am 348

    The assigned IP will not be released if the controllers are removed.
    Is there any way to release the assigned IP?
    I am using NSX 6.2 currently.


    • Simone -  May 17, 2016 - 3:37 pm 475

      Hi Yves,
      you can release an assigned IP using the REST API. There is a HTTP DELETE method for that, you’ll find it in the API documentation.
      Best regards,

      • knp -  June 7, 2016 - 7:40 am 490

        What is the functionality of this REST call. Does it release all IP’s allocated, or does it release only the unused

        what is the implication of doing this on a production env?


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