DNS troubleshooting for 9.10 version. (182 Views)
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HP Expert
fariassolis
Posts: 750
Registered: ‎03-13-2012
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DNS troubleshooting for 9.10 version.

[ Edited ]

Hello Community

 

-There are some scenarios when  addresses are not resolving to correct namesin NNMi. There are some configuration checks that will help to find out the root cause of the issue.  

 

1-Please check if DNS is resolving fine from an Operating System prospective.

 

  • Check using the nslookup command.

 

2-Please adjust the desire Node Name Resolution  configuration in NNMi .

 

This will help to know what you can expect  NNMi to  add the hostname  as Node Name Resolution.

 

-This can be  found under Configuration ->Discovery.

 

Node name resolution.JPG

 

 

3-NNMi contains his own DNS cache, you can check if the Name Resolution from the NNMi prospective is working properly.

 

 

a-Access the following URL to invoke the get hostname method using the Fully qualified Domain Name.

 

http://NNMiFQDN/jmxconsole/HtmlAdaptor?action=inspectMBean&name=com.hp.nms.dnsejb%3Ambean%3DDNSSupport

 

 

b- Add the IP address in the ParamValue and click on Invoke.

 

 

get.JPG

 

 

 

c-This will report the hostname associated to that IP  in the NNMi DNS cache.

 

 

d- If the name is not resolving to an old DNS name previously configured and not the expected one you can clear the NNMi  DNS cache.

 

 

  • Access the following URL to invoke “Clear All Caches ()” method.

 

 

http:///NNMiFQDN/jmx-console/HtmlAdaptor?action=inspectMBean&name=com.hp.nms.dnsejb%3Ambean%3DDNSSup...

 

 

  • Invoke  the method “clearAllCaches ()”

clear.JPG

 

 

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