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Forum Discussion

JG's avatar
JG
Icon for Cumulonimbus rankCumulonimbus
Feb 10, 2015

Pool members with fully-qualified domain names (FQDNs): How does this work?

From release notes of v11.6.0 (on new features):   Populate pools by FQDN This release includes the ability to configure a BIG-IP system with nodes and pool members that are identified with fully...
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Brad_Parker_139's avatar
Brad_Parker_139
Icon for Nacreous rankNacreous
Feb 11, 2015

The FQDN node list will auto populate all the nodes that are returned by the DNS query; they are called ephemeral nodes. You need to make sure your DNS server is set to return all A records for this to occur.

 

JG's avatar
JG
Icon for Cumulonimbus rankCumulonimbus
Feb 11, 2015
Thanks for your response. Does this mean that the total or maximum number of pool members/nodes is determined from the initial DNS query of the fqdn made at the time of pool creation, i.e. the number of A records returned? And just how ephemeral are these pool members/nodes? Are all subsequent DNS queries based on the TTL of the records? There should be a sol article to give us more details about this.