[OpenSIPS-Users] 1.5.2 dispatcher module behaviour

[Bogdan-Andrei Iancu]

Hi Taner,

Taner Sener wrote:
> Hi,
>
> I'm using Opensips 1.5.2 to distribute incoming calls to my clients 
> using dispatcher module. I'm keeping my gateway list in db_mysql and 
> use ds_select_dst("1", "4"); to select a gateway using round-robin 
> algorithm. I have a few issues about the module behaviour.
>
> - The first one is about pinging. I've configured dispatcher to send 
> ping requests every 20 seconds. But if destination is not available, 
> ping requests are repeated every 4 seconds. I guess there is another 
> module which repeats the unresponded sip messages. How can I prevent 
> this and change the repeat timeout about this?
there should be no second module to do the pinging, and there is no way 
the module can dynamically change the pinging interval.

try enabling full debug (debug=6) and look for the log messages like:
    "probing set #n, URI xxxxxxxx  "
>
> - The second issue is about selecting gateways. When I receive busy 
> from one of the destinations I'm calling ds_next_dst() and this 
> returns me a destination which is not alive and does not respond to 
> ping requests. I'm expecting to have only destinations which are 
> alive, and don't understand why it is returned. Another issue here is: 
> I'm sending INVITE request to this dead destination and dead host is 
> not responding as expected. After that, every 4 seconds INVITE request 
> is repeated for this dead destination.
you should call the ds_mark_dst() function from failure route, when you 
detect a destination as failed (and before the ds_next_dst() ). See:

    http://www.opensips.org/html/docs/modules/1.5.x/dispatcher.html#id271344



Regards,
Bogdan
>
> How can I fix these issues?
>
> Thanks,
>
> --------------------
> modparam("dispatcher", "db_url", 
> "mysql://opensips:opensipsrw@localhost/opensips")
> modparam("dispatcher", "table_name", "dispatcher")
> modparam("dispatcher", "setid_col", "setid")
> modparam("dispatcher", "destination_col", "destination")
> modparam("dispatcher", "flags_col", "flags")
> modparam("dispatcher", "flags", 3)
> modparam("dispatcher", "force_dst", 1)
> modparam("dispatcher", "ds_ping_method", "OPTIONS")
> modparam("dispatcher", "ds_ping_from", "sip:dispatcher at 10.210.154.201 
> <mailto:sip%3Adispatcher at 10.210.154.201>")
> modparam("dispatcher", "ds_ping_interval", 20)
> modparam("dispatcher", "ds_probing_threshhold", 1)
> modparam("dispatcher", "ds_probing_mode", 1)
> #modparam("dispatcher", "use_default", 0)
> modparam("dispatcher", "dst_avp", "$avp(i:271)")
> modparam("dispatcher", "grp_avp", "$avp(i:272)")
> modparam("dispatcher", "cnt_avp", "$avp(i:273)")
> --------------------
> t_on_failure("11");
>  
> ds_select_dst("1", "4");
>
> xlog("L_INFO","ds_dispatcher $avp(i:271) $avp(i:272) $avp(i:273)");
> xlog("L_INFO","ds_dispatcher Trying first route $dd $od $rd $td $br");
>  
> t_relay();
> --------------------
> failure_route[11] {
>     xlog("L_INFO","ds_dispatcher First route failed. Trying second");
>     if(t_check_status("408") ){
>          if (ds_next_dst()){
>              xlog("L_INFO","ds_dispatcher $avp(i:271) $avp(i:272) 
> $avp(i:273)");
>              t_on_failure("11");
>              t_relay();
>         } else {
>                 xlog("L_INFO","ds_dispatcher Can not select the second 
> one");
>         }
>     } else if (t_check_status("486")) {
>          if (ds_next_dst()){
>              xlog("L_INFO","ds_dispatcher $avp(i:271) $avp(i:272) 
> $avp(i:273)");
>              t_on_failure("11");
>              t_relay();
>         } else {
>                 xlog("L_INFO","ds_dispatcher Can not select the second 
> one");
>         }
>     } else {
>         xlog("L_INFO","ds_dispatcher Run out of servers in 
> dispatcher.list");
>     }
> }
>
>
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