# Cannot detect cluster \[aks-cluster\] upstream DNS prefix 

**URL:** <https://forums.suse.com/t/cannot-detect-cluster-aks-cluster-upstream-dns-prefix/36220>\
**Category:** SUSE Rancher Prime\
**Created:** [November 18, 2021, 5:52am UTC](https://forums.suse.com/t/cannot-detect-cluster-aks-cluster-upstream-dns-prefix/36220 "2021-11-18T05:52:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![aloknagaonkar](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/aloknagaonkar/32/8281_2.png) [@aloknagaonkar](https://forums.suse.com/u/aloknagaonkar)\
**Post date:** [November 18, 2021, 5:52am UTC](https://forums.suse.com/t/cannot-detect-cluster-aks-cluster-upstream-dns-prefix/36220/1 "2021-11-18T05:52:51Z")

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Hi  
I have deployed the rancher using helm chart version 2.6.2 on AKS private cluster.  
When i am trying it import the existing AKS private cluster i get below error on rancher UI screen.

Cannot detect cluster [aks-cluster] upstream DNS prefix.

Please advise