Re: Failover-Failback without any Load-Balancing

Hi again,

In your quoted config, you have:
if (t_check_status("503|408") or t_branch_timeout() or 
!t_branch_replied()) {

, but according to the example in the module docs it should be
if (t_check_status("503|408") or (t_branch_timeout() and 
!t_branch_replied())) {

- This config works for me, where 'or (t_branch_timeout() and 
!t_branch_replied())' kicks in when a target is completely down

Lars

Den 2026-04-06 kl. 14:52, skrev Kama User via sr-users:
> Thanks for the answer.
> I made the changes but unfortunately the result is the same.
>
> /etc/kamailio/dispatcher.list:
> 1 sip:10.0.0.65:5060 0 2
> 1 sip:10.0.0.75:5060 0 1
>
> /etc/kamailio/kamailio.cfg:
> # --- Global Parameter ---
> debug=2
> log_stderror=no
> log_facility=LOG_LOCAL0
> fork=yes
> children=4
>
> # IP Addresses of Kamailio Server
> listen=udp:10.0.0.203:5060
> listen=tcp:10.0.0.203:5060
>
> # Module Loading
> mpath="/usr/lib/x86_64-linux-gnu/kamailio/modules/"
>
> # --- Load Modules ---
> loadmodule "tm.so"
> loadmodule "sl.so"
> loadmodule "rr.so"
> loadmodule "pv.so"
> loadmodule "textops.so"
> loadmodule "dispatcher.so"
> loadmodule "maxfwd.so"
> loadmodule "corex.so"
> loadmodule "xlog.so"
> loadmodule "ctl.so"
>
> # --- Module Parameters ---
> modparam("tm", "fr_timer", 5000)
> modparam("tm", "fr_inv_timer", 30000)
> modparam("dispatcher", "list_file", "/etc/kamailio/dispatcher.list")
> modparam("dispatcher", "force_dst", 1)
> modparam("dispatcher", "flags", 2)
> modparam("dispatcher", "ds_ping_method", "OPTIONS")
> modparam("dispatcher", "ds_ping_interval", 10)
> modparam("dispatcher", "ds_probing_mode", 1)
> modparam("dispatcher", "ds_probing_threshold", 2)
> modparam("dispatcher", "ds_inactive_threshold", 4)
>
> request_route {
>      if (is_method("INVITE|REGISTER")) {
>          if (!ds_select_dst("1", "4")) {
>              sl_send_reply("503", "No servers available");
>              exit;
>          }
>          
> 	xlog*("Selected Reg Trunk $rd/$du \n");
>          t_on_failure("FAILOVER");
>          t_relay();
>          exit;
>      }
> }
>
> failure_route[FAILOVER] {
>      if (t_check_status("503|408") or t_branch_timeout() or !t_branch_replied()) {
> 	xlog("Failed Trunk $rd/$du Detected \n");
>          if (ds_next_dst()) {
>              t_on_failure("FAILOVER");
>              t_relay();
>              exit;
>          }
>      }
> }
>
> Can I do failover-failback with this construction?
> rewritehostport("10.0.0.65:5060");
> forward();
>
> Thanks in advance.
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__________________________________________________________
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Important: keep the mailing list in the recipients, do not reply only to the sender!