ISE with DNS question

Hello Techies,

I'm challenge when configuring ISE to join AD. Domain name lookup fails. DNS works perfectly well;

nslookup works fine on ISE for simple domain names, but domain names long he fails all by throwing the following error;

;; Truncated, retrying in TCP mode.

;; connection has expired; no servers could be reached

While searching on google, threads can discuss it delivers a common with linux, when several IP is returned by the DNS query. Solution is to make static entries

/etc/resolv.conf

Not able to find it at ISE, such that it does not provide access to the operating system. I'm running on VMware.

Looking forward for your valuable contributions to solve this problem.

Thank you

Hello

You need to work it with TAC for that matter, I'm not aware of any bugs on reach AD due to a long suffix, but it would be something to work with them on. Also are there any ACL or firewall blocking DNS environment ISE tcp ports?

Also, check to see if you can resolve the hostname of the ise and its ip address (front and rear).

Thank you

Tarik Admani
* Please note the useful messages *.

Tags: Cisco Security

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