Hi, we have the following settings and those work fine for us (Kamailio 4 and later):
# Do SRV-Loadbalancing: dns_srv_lb=yes # Always prefer IPv6: dns_try_ipv6=yes # DNS-Based failover use_dns_failover=yes # Query NAPTR-Records as well (we use NAPTR, so the client can detect the outbound Proxy (P-CSCF), but internally we only use only SRV-records) dns_try_naptr=no Sounds to me, like a DNS problem, not a Kamailio problem. In our DNS Zone, we have the following, for example: wt 1D IN A 84.46.93.82 wt 1D IN A 84.46.93.84 wt-1 1D IN A 84.46.93.82 wt-2 1D IN A 84.46.93.84 wt 1D IN NAPTR 10 10 "s" "SIP+D2U" "" _sip._udp.wt _sip._udp.wt 1D SRV 10 1 5060 wt-1 _sip._udp.wt 1D SRV 20 1 5060 wt-2 On Debian/Ubuntu, you can verify this with Sofia-SIP (apt-get install sofia-sip-bin): carsten@carsten-HP-EliteBook-840-G3:~$ sip-dig wt.ng-voice.com 1 1.000 udp 5060 84.46.93.82 2 1.000 udp 5060 84.46.93.84 Thanks, Carsten 2017-01-19 22:58 GMT+01:00 Jeremy Gadd <jeremyg...@gmail.com>: > Hello, everyone! > > I'm trying to enable dns_srv_lb but I'm stuck just before I can get there. > If I don't enable use_dns_failover, lookups work and calls route but always > to the first host. We need to load balance, so that doesn't work very well. > > If I enable use_dns_failover, the lookups stop working completely and we get > a dns lookup failure like so: > ERROR: tm [ut.h:296]: uri2dst2(): ERROR: uri2dst: failed to resolve > "redacted.hostname.here.com" :unresolvable A or AAAA request (-7) > > This works: > use_dns_cache=on > dns_use_search_list=no > dns_try_naptr=on > # use_dns_failover=on > > This breaks it: > use_dns_cache=on > dns_use_search_list=no > dns_try_naptr=on > use_dns_failover=on > > I have checked to see that use_dns_failover is compiled in: > version: kamailio 4.4.2 (x86_64/linux) > flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, > DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, > Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, > FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, > USE_DST_BLACKLIST, HAVE_RESOLV_RES > ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, > MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB > poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. > id: unknown > compiled with gcc 4.9.2 > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > sr-users@lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users > -- Carsten Bock CEO (Geschäftsführer) ng-voice GmbH Millerntorplatz 1 20359 Hamburg / Germany http://www.ng-voice.com mailto:cars...@ng-voice.com Office +49 40 5247593-40 Fax +49 40 5247593-99 Sitz der Gesellschaft: Hamburg Registergericht: Amtsgericht Hamburg, HRB 120189 Geschäftsführer: Carsten Bock Ust-ID: DE279344284 Hier finden Sie unsere handelsrechtlichen Pflichtangaben: http://www.ng-voice.com/imprint/ _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
