[SR-Users] Failover - how does it work?

I have the following basic script: request_route{ record_route(); $var(enumres) = enum_query(); switch( $var(enumres) ) { case -1: xlog("enum_query lookup failure - To URI $tU"); sl_reply("503", "Temporary lookup failure"); return(0); case 1: break; # uri replaced } xlog("INVITE ENUM query - To URI $tU"); t_relay(); I have the following ENUM records for a test setup: ;; ANSWER SECTION: x.x.x.1.5.1.8.3.0.3.1.e164.arpa. 60 IN  NAPTR 100 10 "U" "E2U+sip" "!^.*$!sip:+13038151xxx@10.20.20.198!" . x.x.x.1.5.1.8.3.0.3.1.e164.arpa. 60 IN  NAPTR 110 10 "U" "E2U+sip" "!^.*$!sip:+13038151xxx@10.20.20.75!" . What happens is the following: tcpdump: listening on ens3, link-type EN10MB (Ethernet), capture size 262144 bytes 17:57:19.961041 IP (tos 0x10, ttl 64, id 59648, offset 0, flags [none], proto UDP (17), length 1481) 10.20.20.40.5060 > 10.20.20.198.5060: SIP, length: 1453       INVITE sip:+13038151xxx@10.20.20.198 SIP/2.0       … 17:57:19.961058 IP (tos 0x10, ttl 64, id 24143, offset 0, flags [none], proto UDP (17), length 1480) 10.20.20.40.5060 > 10.20.20.75.5060: SIP, length: 1452       INVITE sip:+13038151xxx@10.20.20.75 SIP/2.0       … These basically go out at the same time. Eventually I get a ICMP Port Unreachable on the .198 one because that’s a dummy I just set up for testing. My question is, with this kind of setup, is there a way to tell Kamailio to respect the NAPTR order value (note, 100, 110 above) and only try the 2nd route if the first fails? Thanks, Jawaid