topic Re: ISE DNS health check showing warning in Network Access Control

ISE DNS health check showing warning

NetworkMonkey101 — Thu, 18 Apr 2024 05:47:32 GMT

Hi all,

I have a four new standalone nodes which will be going into a cluster, I am seeing two nodes have a DNS warning. All nodes are located in the same ca

I can ping both DNS servers .21 and .22 and nslookup up works to resolve its own IP

Why are two showing this?

Re: ISE DNS health check showing warning

balaji.bandi — Thu, 18 Apr 2024 07:19:54 GMT

Do you have DNS Entry for that pan node which is failing ?

if your PC using same DNS, are you able to resolve that ?

All the ISE node giving same error ?

Re: ISE DNS health check showing warning

Aref Alsouqi — Thu, 18 Apr 2024 09:05:11 GMT

I had a similar issue with a customer of mine a few months back, and the issue was caused by a buggy behaviour of ISE. If I remember correctly we could fix the issue by swapping the DNS servers order and then putting them back to how they were before.