Hi James

> It should automatically re-use an existing TCP connection.
> Can you give an example?

After digging more in this issue, it looks like I found the solution:

Upon successful REGISTER authentication I do:

                if ($proto != 'udp') {
                        tcp_keepalive_enable("60", "5", "5");   # TCP KA once 
per minute
                        tcp_set_connection_lifetime("3605");    # Live for one 
hour
                        force_tcp_alias();                      # Force traffic 
back on existing session
                        if ($avp(debug) > 0) {
                                xlog("L_INFO", "$cfg(route): KEEP ALIVE engaged 
on $proto => ConID: $conid\n");
                        }
                }

Especially force_tcp_alias() seems to make sure, communication TO the
CPE takes the existing TCP or TLS session towards the CPE and does not
create a new session.

Mit freundlichen Grüssen

-Benoît Panizzon-
-- 
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