I am in the process of standing up a new voice network. I know this is posted to the WAN/Routing page, this IS a WAN/Routing question, even if it is about routing voice. As you can see from my attached image, I have 3 sites, 2 branch offices and the Corporate HQ. Site 2 is a standard MPLS site and their phone calls are controlled by an MPLS Carrier SIP server. They calls work fine. Site 1 doesn't have MPLS, but is connected to the network via an IPSEC tunnel back to Corp HQ. My problem is I need Site 1 to talk to the MPLS Carrier SIP Server. The MPLS Carrier SIP Server has a public IP address, not a standard internal one, but it is only accessible via their MPLS cloud. I need to route traffic from Site 1 through Corp HQ and hairpin it back out the MPLS to the SIP server. Typically for an IPSEC site, I just add the local subnets and the HQ subnets, but could I add the Carrier SIP server's subnet too? What would be the best way to route this?
Thanks.
