[Serusers] Forwarding to backup gateway

Hi, At work are planning to use SER to route traffic between a pstn gateway, Asterisk, and direct lookups. We would like to set up the routing to try a second gateway if it cannot contact the primary gateway. Below is the config file and attached is the output from a sample session. Ideally, we would like to see If( ! forward to GW2) Forward(GW1); } it anyway:-) ). The config below does get to the failure_route but at that point two errors appear: 1(21749) ERROR: t_forward_nonack: no branched for fwding 1(21749) ERROR: failure_route: t_relay_to failed Any tips/pointers? David # ----------- global configuration parameters ------------------------ listen=XXX.XXX.XXX.XXX alias=XXX.com alias=XXX.XXX.com #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) # -- tm params -- #modparam("tm", "fr_timer", 10) modparam("tm", "fr_inv_timer", 15) # ------------------------- 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") { # Uncomment this if you want to use digest authentication # if (!www_authorize("iptel.org", "subscriber")) { # www_challenge("iptel.org", "0"); # break; # }; save("location"); break; }; if (method=="INVITE") { # local user ids if (uri=~"^sip:1[0-9][0-9][0-9][0-9][0-9][0-9]@") { forward("sip.dotality.com"); break; }; # Phone #s if (uri=~"^sip:[2-9][0-9][0-9][0-9][0-9][0-9][0-9]@") { log("---> TRYING GW2 <---\n"); t_on_failure("1"); t_relay_to_udp("gw2","5060"); break; }; # native SIP destinations are handled using our USRLOC DB if (!lookup("location")) { sl_send_reply("404", "Not Found"); break; }; # 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(); }; }; }; } # Fallback route for pstn gateways. failure_route[1] { log("---> TRYING GW1 <---\n"); t_relay_to_udp("GW1","5060"); break; }