Hi,
Test configuration uses OPTION for ping method. In log below host 198.51.100.68 probed first but reply come latter then 192.0.2.4. Seams that only last probed uri tried for setting state other hosts. Also, DEBUG log is broken. (kamailio version: kamailio 4.1.0-pre1 (i386/linux)).
Nov 5 12:48:01 localhost kamailio[23729]: DEBUG: dispatcher [dispatch.c:2420]: ds_check_timer(): probing set #28, URI sip: 198.51.100.68:5060 Nov 5 12:48:01 localhost kamailio[23729]: DEBUG: tm [uac.c:243]: t_uac_prepare(): DEBUG:tm:t_uac: next_hop=sip:172.16.23.130 Nov 5 12:48:01 localhost kamailio[23729]: DEBUG: tm [uac.c:182]: dlg2hash(): DEBUG: dlg2hash: 33871 Nov 5 12:48:01 localhost kamailio[23729]: DEBUG: tm [uac.c:345]: t_uac_prepare(): executing event_route[tm:local-request] Nov 5 12:48:01 localhost kamailio[23729]: INFO: <script>: 1280:tm:local-request OPTIONS sip:198.51.100.68:5060 --ID= 77db7ea0-23729@172.16.23.5 Nov 5 12:48:01 localhost kamailio[23729]: DEBUG: tm [uac.c:410]: t_uac_prepare(): apply new updates to sip msg Nov 5 12:48:01 localhost kamailio[23729]: DEBUG: dispatcher [dispatch.c:2420]: ds_check_timer(): probing set #0, URI sip:192.0.2.4:5090 Nov 5 12:48:01 localhost kamailio[23729]: DEBUG: tm [uac.c:243]: t_uac_prepare(): DEBUG:tm:t_uac: next_hop=sip:172.16.23.130 Nov 5 12:48:01 localhost kamailio[23729]: DEBUG: tm [uac.c:182]: dlg2hash(): DEBUG: dlg2hash: 33872 Nov 5 12:48:01 localhost kamailio[23729]: DEBUG: tm [uac.c:345]: t_uac_prepare(): executing event_route[tm:local-request] Nov 5 12:48:01 localhost kamailio[23729]: INFO: <script>: 1280:tm:local-request OPTIONS sip:192.0.2.4:5090 --ID= 77db7ea1-23729@172.16.23.5 Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_lookup.c:1071]: t_check_msg(): DEBUG: t_check_msg: msg id=54 global id=53 T start=(nil) Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_lookup.c:949]: t_reply_matching(): DEBUG: t_reply_matching: hash 33871 label 0 branch 0 Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_lookup.c:1003]: t_reply_matching(): DEBUG: t_reply_matching: reply matched (T=0xb492a8a8)! Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_lookup.c:1140]: t_check_msg(): DEBUG: t_check_msg: msg id=54 global id=54 T end=0xb492a8a8 Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_reply.c:2205]: reply_received(): DEBUG: reply_received: org. status uas=0, uac[0]=0 local=2 is_invite=0) Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_reply.c:1309]: t_should_relay_response(): ->>>>>>>>> T_code=0, new_code=200 Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_reply.c:2085]: local_reply(): DEBUG: local_reply: branch=0, save=0, winner=0 Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_reply.c:2122]: local_reply(): DEBUG: local transaction completed Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_hooks.c:288]: run_trans_callbacks_internal(): DBG: trans=0xb492a8a8, callback type 1024, id 0 entered Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: dispatcher [dispatch.c:2359]: ds_options_callback(): OPTIONS-Request was finished with code 200 (to 192.0.2.4:5090> Nov 5 12:48:01 localhost kamailio[23725]: ERROR: dispatcher [dispatch.c:2372]: ds_options_callback(): Setting the state failed ( 192.0.2.4:5090> Nov 5 12:48:01 localhost kamailio[23725]: DEBUG: tm [t_reply.c:1667]: cleanup_uac_timers(): DEBUG: cleanup_uac_timers: RETR/FR timers reset Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: tm [t_lookup.c:1071]: t_check_msg(): DEBUG: t_check_msg: msg id=50 global id=49 T start=(nil) Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: tm [t_lookup.c:949]: t_reply_matching(): DEBUG: t_reply_matching: hash 33872 label 0 branch 0 Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: tm [t_lookup.c:1003]: t_reply_matching(): DEBUG: t_reply_matching: reply matched (T=0xb492c918)! Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: tm [t_lookup.c:1140]: t_check_msg(): DEBUG: t_check_msg: msg id=50 global id=50 T end=0xb492c918 Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: tm [t_reply.c:2205]: reply_received(): DEBUG: reply_received: org. status uas=0, uac[0]=0 local=2 is_invite=0) Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: tm [t_reply.c:1309]: t_should_relay_response(): ->>>>>>>>> T_code=0, new_code=200 Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: tm [t_reply.c:2085]: local_reply(): DEBUG: local_reply: branch=0, save=0, winner=0 Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: tm [t_reply.c:2122]: local_reply(): DEBUG: local transaction completed Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: tm [t_hooks.c:288]: run_trans_callbacks_internal(): DBG: trans=0xb492c918, callback type 1024, id 0 entered Nov 5 12:48:01 localhost kamailio[23726]: DEBUG: dispatcher [dispatch.c:2359]: ds_options_callback(): OPTIONS-Request was finished with code 200 (to sip:192.0.2.4:5090, group 0)
ds_list shows: SET_NO:: 2 SET:: 28 URI:: sip:198.51.100.68:5060 flags=TX priority=1 attrs= SET:: 0 URI:: sip:192.0.2.4:5090 flags=AP priority=1 attrs=