Folks,
Ignore the email below -- problem was fixed when I upgraded to 0.9.0.
Regards,
Colin
On Tue 31 May 05, 14:50:24 +0100, Colin Dalton wrote:
> Hello,
>
> Apologies if this has come up before, but I'm having some problems
> with SER not forwarding an ACK back to a Cisco AS5300 media gateway. This
> means that incoming calls break down because the 5300 hasn't received
> an ACK from the SIP phone. Outgoing calls are fine, because SER is
> forwarding the 5300's ACK back to the SIP phone correctly. Would anyone
> know why this is only working in one direction?
>
> With incoming calls, the sequence of events is:
>
> 1. I dial the PSTN number on my SIP phone.
> 2. The SIP phone sends the INVITE to SER.
> 3. SER rewrites the host and forwards it to the Media Gateway (MGW)
> 4. The MGW brings up an ISDN channel and connects the call
> 5. When the call is answered, the MGW sends back the 200/OK to SER
> 6. SER forwards the 200/OK on to the SIP phone and I can converse on the call
> 7. The SIP phone sends the ACK back to SER, but SER doesn't send it on to
> the MGW.
> 8. The MGW waits 19 secs before disconnecting the call because it hasn't
> received an ACK.
>
> In the reverse direction everything works fine, because SER sends on the
> ACK it receives from the AS5300.
>
> My configuration is appended below. Running IOS 12.3(9) on the 5300, the
> SIP phone is a Siemens Optipoint 400. SER version is 0.8.10 on Fedora
> Core 3.
>
> Thanks,
>
> Colin
>
> --- config ---
>
> #
> # $Id: ser.cfg,v 1.21.4.1 2003/11/10 15:35:15 andrei Exp $
> #
> # simple quick-start config script
> #
>
> # ----------- global configuration parameters ------------------------
>
> #debug=3 # debug level (cmd line: -dddddddddd)
> #fork=yes
> #log_stderror=no # (cmd line: -E)
>
> /* Uncomment these lines to enter debugging mode
> debug=7
> fork=no
> log_stderror=yes
> */
>
> check_via=no # (cmd. line: -v)
> dns=no # (cmd. line: -r)
> rev_dns=no # (cmd. line: -R)
> #port=5060
> #children=4
> fifo="/tmp/ser_fifo"
>
> # ------------------ module loading ----------------------------------
>
> # Uncomment this if you want to use SQL database
> #loadmodule "/usr/local/lib/ser/modules/mysql.so"
>
> loadmodule "/usr/local/lib/ser/modules/sl.so"
> loadmodule "/usr/local/lib/ser/modules/tm.so"
> loadmodule "/usr/local/lib/ser/modules/rr.so"
> loadmodule "/usr/local/lib/ser/modules/maxfwd.so"
> loadmodule "/usr/local/lib/ser/modules/usrloc.so"
> loadmodule "/usr/local/lib/ser/modules/registrar.so"
>
> # Uncomment this if you want digest authentication
> # mysql.so must be loaded !
> #loadmodule "/usr/local/lib/ser/modules/auth.so"
> #loadmodule "/usr/local/lib/ser/modules/auth_db.so"
>
> # ----------------- setting module-specific parameters ---------------
>
> # -- usrloc params --
>
> modparam("usrloc", "db_mode", 0)
>
> # Uncomment this if you want to use SQL database
> # for persistent storage and comment the previous line
> #modparam("usrloc", "db_mode", 2)
>
> # -- auth params --
> # Uncomment if you are using auth module
> #
> #modparam("auth_db", "calculate_ha1", yes)
> #
> # If you set "calculate_ha1" parameter to yes (which true in this config),
> # uncomment also the following parameter)
> #
> #modparam("auth_db", "password_column", "password")
>
> # -- rr params --
> # add value to ;lr param to make some broken UAs happy
> modparam("rr", "enable_full_lr", 1)
>
> # ------------------------- request routing logic -------------------
>
> # main routing logic
>
> route{
>
> # initial sanity checks -- messages with
> # max_forwards==0, or excessively long requests
> if (!mf_process_maxfwd_header("10")) {
> sl_send_reply("483","Too Many Hops");
> break;
> };
> if ( msg:len > max_len ) {
> sl_send_reply("513", "Message too big");
> break;
> };
>
> # we record-route all messages -- to make sure that
> # subsequent messages will go through our proxy; that's
> # particularly good if upstream and downstream entities
> # use different transport protocol
> record_route();
> # loose-route processing
> if (loose_route()) {
> t_relay();
> break;
> };
>
> # if the request is for other domain use UsrLoc
> # (in case, it does not work, use the following command
> # with proper names and addresses in it)
> if (uri==myself) {
>
> if (method=="REGISTER") {
> save("location");
> break;
> };
>
> if (uri=~"^sip:9[0-9]*@*") { # pstn escape = 9
> # strip(9);
> rewritehostport("159.134.250.247:5060");
> log(1,"Forwarding to PSTN/n");
> forward(159.134.250.247, 5060);
> } else {
> # native SIP destinations are handled using our USRLOC DB
> if (!lookup("location")) {
> sl_send_reply("404", "Not Found");
> break;
> };
> forward(uri:host,uri:port);
> };
> # forward to current uri now; use stateful forwarding; that
> # works reliably even if we forward from TCP to UDP
> if (!t_relay()) {
> sl_reply_error();
> };
>
> };
> }
>
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