You can use the local ipv4 as the sip address for a profile, but the the external public ip as sip-ext-ip and sip-ext-rtp-ip 

David

On Wed, 2 Oct 2019 at 21:31, Ciprian Dosoftei <ciprian.dosoftei@gmail.com> wrote:
Sean --

You can enable an arbitrary number of IP:Port combinations, essentially each Sofia profile is represents a listener.

However, if the IP address is not available (say the floating IP is pointing to server A whereas server B acts as a live standby), the profile will likely refuse to start, so you may need some additional automation to make it work as expected.

-C
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David Villasmil
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