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Wangzixuan_3147's avatar
Wangzixuan_3147
Icon for Nimbostratus rankNimbostratus
Jan 16, 2019

How to speed up DNS resolution

Hello everyone: Our customers have two outbound lines, each with a GTM and two GTMs in a sync group. When the other line is dropped, the client DNS still resolves to the old address. This may be related to local DNS. Does F5GTM have any mechanism for customers to quickly resolve to a new address? We tested it for about 5 minutes, or the old address that was resolved, causing the app to be inaccessible.

 

application delivery
BIG-IP
BIG-IP DNS

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  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Jan 17, 2019

    Default TTL in wide ip is 30 seconds to force client to send a new request.

     

    Browsers will use same server ip until tab closed or page refreshed.

     

    If you want the browser to fallback to other ip, you can configure 2 answers per request in wide ip or pool!