Hi, you have to add a failure-route, where you set the state to probing (e.g. ds_set_state("p")). If this is set 3 times (ds_probing_threshhold), the gateway will be longer selected from ds_select_domain / .._dst and will be queried with an OPTIONS-request. In case of a successful query, the gateway will be enabled again. As long as the state is active, you will not see any OPTIONS-request. Carsten Am Freitag, den 24.10.2008, 18:08 +0200 schrieb Klaus Darilion:

Hi I get the following unexpected behavior: Two kamailio servers configured to handle REGISTER and OPTIONS receive a traffic load-balanced by a third kamailio/dispatcher node. This works and both servers are receiving equal loads of REGISTER and periodic OPTIONS. I shutdown first kamailio gateway and I see that almost imediately all the traffic goes to this server instead of being rerouted to the running server ?! After some seconds (eg. 10 seconds) the running gateway does not receive anymore traffic and all the traffic is sent to the server that is shutdown. After more than 20 seconds, the running gateway starts receiving all the traffic. Nevertheless, when I start again the gateway I've shutdowned, traffic is almost immediately load-balanced again. I'm testing the following configuration: modparam("dispatcher", "list_file", "/usr/local/etc/kamailio/dispatcher.list") modparam("dispatcher", "flags", 3) modparam("dispatcher", "dst_avp", "$avp(i:271)") modparam("dispatcher", "grp_avp", "$avp(i:272)") modparam("dispatcher", "cnt_avp", "$avp(i:273)") modparam("dispatcher", "ds_ping_method", "OPTIONS") modparam("dispatcher", "ds_ping_interval", 3) modparam("dispatcher", "ds_ping_from", "sip:fend1@10.132.184.33<sip%3Afend1@10.132.184.33> ") modparam("dispatcher", "ds_probing_threshhold", 1) modparam("dispatcher", "ds_probing_mode", 1) route{ if (is_method("REGISTER") || is_method("OPTIONS")) { ds_select_dst("1", "0"); t_on_failure("1"); t_relay(); exit; } } failure_route[1] { xlog("L_INFO", "Marking GW as failed...\n"); ds_mark_dst("p"); ds_next_dst(); t_on_failure("1"); t_relay(); } Any idea of what is wrong ? Regards, Pascal On Mon, Oct 27, 2008 at 11:04 AM, Pascal Maugeri &lt;pascal.maugeri(a)gmail.com&gt;wrote;wrote: