Forum Discussion
Hi,
If your VS goes offline, the customers who got the previous available IP will fail until the TTL expire or cache flushes.
You should consider setting lower values for TTL to have high availability for your application.
Regards
Hi,
When query response are persisted, LDNS/client (an IP range) will get same resolved IP during this persistence validity.
When you check to persist to WideIP and keep "Verify Member Availability" on pool marked, in case of persisted member goes unavailable during ttl persistence, BIG-IP should reselect a new member.
So, a DNS record TTL is to cache responses on client and TTL persistence is a BIG-IP DNS feature to keep clients routed to destination address they first got.
For more:
https://support.f5.com/csp/article/K15594
Regards.