Hi can I simply change all of the t_relay to t_relay_to_tcp in P-CSCF, I-CSCF and S-CSCF?
how I can make sure it will not affect "SIP client <-> P-CSCF (either UDP or TCP, based on the transport tag) "? On Sun, Jun 7, 2020 at 6:21 PM Henning Westerholt <[email protected]> wrote: > > Hello, > > there is not a central switch to configure TCP transport etc.. But check your > configuration, I guess that it uses t_relay() for forwarding. You can specify > the wanted protocol in the t_relay call, there are special function > (t_relay_to_tcp() etc..) for this. > http://kamailio.org/docs/modules/stable/modules/tm.html#tm.f.t_relay > > About the SRV query - check it e.g. with tcpdump if Kamailio does the SRV > query. Is there is a port specified in the forwarding target, it will not do > it. > > Cheers, > > Henning > > -- > Henning Westerholt – https://skalatan.de/blog/ > Kamailio services – https://gilawa.com > > -----Original Message----- > From: sr-users <[email protected]> On Behalf Of BALL SUN > Sent: Friday, June 5, 2020 10:36 AM > To: [email protected] > Subject: [SR-Users] Kamailio IMS using returned SRV records for transport > slelection > > Hi All > > I am new to Kamailio IMS, and I just setup a testing environment where having > P-CSCF, I-CSCF and S-CSCF. > > I would like to use make below works > 1. SIP client <-> P-CSCF (either UDP or TCP, based on the transport tag) 2. > P-CSCF <-> I-CSCF (TCP by default) 3. I-CSCF <-> S-CSCF (TCP by default) > > For point 2, I observed that P-CSCF actually will send DNS SRV query to DNS > server for resolving _sip._udp. and _sip._tcp. I believed we can just disable > the "_sip._udp." so that P-CSCF will always use TCP to communication wih > I-CSCF. > > However, for point 3, I didnt notice I-CSCF send DNS SRV query, > > My question is how we can force I-CSCF to do that or is there any > configuration that we should enable such that I-CSCF always use TCP to S-CSCF? > > - RBK > > _______________________________________________ > Kamailio (SER) - Users Mailing List > [email protected] > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users _______________________________________________ Kamailio (SER) - Users Mailing List [email protected] https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
