Last Modified: Oct 25, 2021
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Known Affected Versions:
15.1.0, 188.8.131.52, 184.108.40.206, 220.127.116.11, 18.104.22.168, 22.214.171.124, 15.1.1, 15.1.2, 126.96.36.199, 15.1.3, 188.8.131.52, 15.1.4, 16.0.0, 184.108.40.206, 16.0.1, 220.127.116.11, 18.104.22.168, 16.1.0
Opened: May 22, 2020
Using RESOLVER::name_lookup in an iRule against a net resolver forward zone name server that happens to be down can result in the iRule pausing for up to a few minutes.
The connection to the virtual server is paused for a significant amount of time.
Nameserver configures as fwd-zone in net resolver should be down.
Use a pool of dns-servers, and configure the pool to monitor the backend dns servers and load balance to healthy pool members.