GSLB decision-flow explainer
The BIG-IP DNS two-tier decision, explained: pool selection at the wide IP, then the preferred, alternate and fallback chain inside the pool, with the grammar validated and the manual's rules cross-checked.
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API endpointGEThttps://ronutz.com/api/v1/f5-gslb-decision-flowDocumented, not served. Opens the specification.
References
- F5 TMSH Reference: gtm pool a (load-balancing-mode, alternate-mode, fallback-mode, dynamic-ratio, qos-* coefficients)
- F5 TMSH Reference: gtm wideip a (pool-lb-mode, persistence, last-resort-pool, decision-log verbosity)
- BIG-IP DNS: Load Balancing - About load balancing and resource availability (and the Topology chapter's both-tiers warning)