BIG-IP DNS Resource Record Types: Architecture, Design and Configuration
Published Oct 31, 2019
Version 1.0Was this article helpful?
https://clouddocs.f5.com/cli/tmsh-reference/latest/modules/gtm/gtm_pool_cname.html
This is from the 17.0 docs which echoes what I said above without the additional context. It is always considered available b/c there are not health checks.
static-target Specifies the member's name specifies a static DNAME rather than a name linked to a Wide IP defined on the system. This may be required if the target DNAME is not owned by the organization or configured on GTM. One side- effect of using a static target is that the member is always considered available for load balancing. The default value is no.