Juha,

For clients one would distribute "client-interface.example.com" as the outbound proxy FQDN to use, and upstream proxies would be given "server-interface.example.com" (by using that as domain in AORs).

For R-R, the proxy would use "client-interface.example.com" if it performed a location service lookup (i.e. assuming that next hop is then an endpoint), or "server-interface.example.com" otherwise.

Nevertheless, in the R-R it would probably be better to be explicit about the transport to use, and not rely on DNS SRV. Then there is no need to worry about client vs server interface protocol preferences, or proxies that use dynamic registration, or DNS SRV misconfiguration or lack of support for it.

Regards,
Jeroen

Juha Heinanen wrote:
Robert Sparks writes:

Something like
_sip._tcp.client-interface.example.com
_sip._tcp.server-interface.example.com

how do you tell your sip client to use the former name its srv
queries? in xmpp it is specified that in client srv query, a prefix
_xmpp-client prefix is always added to the name.

-- juha


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