[OpenSER-Users] Failover using NAPTR/SRV

Hi all, I've been trying to find this information but I cannot find any exact specifications on how it really works. From what I know using NAPTR/SRV records with OpenSER will allow it to find and use servers behind those DNS-records. This works just fine. However, what I'm not sure about is what actually will happen in OpenSER when one of two servers in this scenario would fail. For example, I have two servers as SRV where one is primary and one is secondary for SIP/UDP. What will happend in OpenSER when the primary server is down? Will OpenSER continue to send all request first towards that server or will it learn that one server is down and always send requests to the second server for a period of time and try the primary one just occassionally? Please direct me to any page where this is explained in detail, if such page exists. Br, /Tobias