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Jeremiah_47575's avatar
Jeremiah_47575
Icon for Nimbostratus rankNimbostratus
Feb 14, 2010

Recommended idle timeout setting for DNS (UDP)?

I have two sets of LTM 3400's hosting my primary and secondary dns vip's with a pool of dns servers behind each respective vip. The vip's are setup for Performance (Layer 4) and I'm using a custom 'f...
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Hamish's avatar
Hamish
Icon for Cirrocumulus rankCirrocumulus
Feb 16, 2010
I used to run DNS frontended by LTM for a pretty big organisation with a major web presence. IIRC we used 10seconds timeout on the UDP, and normal 300s on the tcp (Since it's only zone transfers and querys/responses that are too big to fit in a single 512B UDP datagram that use TCP - That's about 13 RR's depending on data).

 

 

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