SIP failover using SRV records

Looking to create a failover solution based on DNS SRV records. Need somebody to provide me a proper configuration tutorial and example of usage. My scenario is: Have two SIP servers in two different locations. Both running Vodia SIP PBX. Vodia using multi tenant subdomain structure based on sub-domains. Each tenant is a sub-domain. DNS provider is Godaddy and we have DNS plus service, so SRV etc. available Phones used by us are Yealink, Grandstream and Snom. What I want to achieve: To have the phone properly configured in order to use SRV method. Phone must register depending on SRV priority and weight. Have to know how to configure properly these three types what we use. To have SRV records configured on the Godaddy DNS management portal. To have SIP Vodia PBX set subdomains configured properly on Master and Slave, assuming that slave is full copy of the Master. How it must work: Master SIP PBX is running and taking registrations. i.e. we have a subdomain [login to view URL] Slave is full backup of the master and is running on different server, use [login to view URL] and a alias of [login to view URL] If Master is running,- then Phone is registered on the master on one of the sub-domain, i.e. 217@[login to view URL] by using SRV option If Master is offline or SIP unavailable for any reason,- then phone switches to Slave and looking for alias.