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Forum Discussion

JMutie's avatar
JMutie
Icon for Nimbostratus rankNimbostratus
7 years ago

DNS server not resolving url until cache is cleared repeatedly.

Hello, What could be causing this? Other dns servers get the records without problem.   The F5 resolves other urls ok only this one has a problem. A pcap shows F5 dns responding with no such nam...
JG's avatar
JG
Icon for Cumulonimbus rankCumulonimbus
7 years ago

This does not seem to be an issue of F5, but of the DNS service provider for the domain; for there are different results for different lookup locations. A lookup failure will carry with it a long negative TTL of hours.