From your practical experience, what is the best option for SIP service redundancy?
a) one SRV record pointing to a hostname which has two A records
b) two SRV records pointing to two different hostnames
c) high-availability tools which switch over the service IP address between two servers
I understand that c) would work with most of the clients, but many environments do not allow sharing an IP address between machines (most virtualization providers don't)