I need to build a highly reliable and scalable asterisk cluster (who doesn't). It will have two WAN connections on the local LAN and additional WAN connections in other physical locations to ensure better up times. I especially like the idea of using DNS SRV.
In reading about Asterisk clustering, it can get pretty complex rather quickly. While the task itself is obviously not for the weak, the most complex part seems to be in being able to find all of the information needed to accomplish the task, and to have a good, all the way through direction.
Now I see that res_ais is now included with 1.6 (which we are running) and I've also read about the DUNDi method. Based on my having two WANs at one location and wanting additional locations, should I be looking at something else or is either of these two a good solution?
I have a lot of hardware (servers) so hardware is not an issue, the solution, using open source (as in free beer), initially, definitely is. The trunks are in PRI/SIP gateway form along with some SIP trunks from Internet providers.