Forum Discussion

danielpenna's avatar
Aug 31, 2015

FQDN Objects not respecting the DNS Interval

Hi guys,

 

Running 11.6.0 HF4 in our PreProd environment in AWS and we are working with development teams that want to use ELB ( Elastic Load Balancers ) behind the F5's. Personally I think its just asking for trouble but thats the situation I am in.

 

Have been using the FQDN auto-populate heavily and have set the Interval for FQDN to 60 seconds to match the ELB's, but I have noticed that the F5 is not honoring that interval. I have a firewall between the F5 and the defined DNS server and can see gaps up to 5 minutes between DNS queries.

 

Another Issue I am seeing is that I can nslookup a ELB name on the CLI but adding it as a FQDN node is a hit/miss affair and when it misses it gives me this error message, Offline (Enabled) - The DNS server(s) are unavailable.

 

Using a PAYG license at the moment, hence can't contact support directly on this issue.

 

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