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MABROUKI_253568's avatar
MABROUKI_253568
Icon for Nimbostratus rankNimbostratus
Mar 09, 2016

DNS responds by 2 addresse VIP

Hello, When i do nslookup NAME_WIP. The DNS SERVER responds by the 2 adresse of the 2 VIP. and when i do ping NAME_WIP i ping the vip 1 and after 30s (TTL) i ping the second vip . The normal case is that the DNS must respond by 1 adresse (The adresse of 1 virtual sevrer)

 

Can you help me please, i can't identify the problem. Thanks

 

BIG-IP DNS
security

1 Reply

  • IanB's avatar
    IanB
    Icon for Employee rankEmployee
    Mar 09, 2016

    This usually means that the response has fallen through to bind (either the local bind, or to another DNS server behind the GTM), and that the GTM process did not provide the response.

     

    For example, if all GTM pool members are down, and the pool lb methods include 'Return to DNS', then the request would be passed to bind, which has no knowledge of the state of the pool members, so just returns what is configured.

     

    Have a look at the statistics for the wideip (DNS / gslb / wide ips / / Statistics - wide ip) - that will show you counters indicating how the query was handled.