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jsgibbs1's avatar
jsgibbs1
Icon for Nimbostratus rankNimbostratus
May 04, 2017

FQDN Pool member failing becuase previously added by IP

I ran into an interesting problem on 12.1.2 and was wondering if this is expected behavior, and if so, why?

 

I had a pool that had a member(node) added by IP with a basic TCP monitor, which worked. I then had a requirement to point to this node by FQDN. After creating the new FQDN pool with a basic TCP monitor, I noticed it would not go green, with /var/log/ltm showing member not found error. This made no sense to me, since I could resolve the FQDN from the CLI and that fact that I was looking at the member as green in the original pool.

 

To resolve the issue, I deleted the node previously created by IP. Once I did that and forced a new resolution, it worked!

 

Any thoughts? If nothing else, hopefully this helps someone else out.

 

application delivery
BIG-IP
fqdn
fqdn pool member
LTM
  • P_K's avatar
    P_K
    Icon for Altostratus rankAltostratus
    May 04, 2017

    Did you try changing to a different monitor? something like tcp_half or gateway_icmp?? on what port is the server listening?

     

  • jsgibbs1's avatar
    jsgibbs1
    Icon for Nimbostratus rankNimbostratus
    May 04, 2017

    Yes, tried different monitors on each pool (tcp, https, and custom https with increased timeout) but no joy.

     

  • JG's avatar
    JG
    Icon for Cumulonimbus rankCumulonimbus
    May 05, 2017

    I'd open a support case to report the problem.