[Feb  9 17:55:27] DEBUG[16382]: res_pjsip_outbound_registration.c:561 handle_client_registration: Outbound REGISTER attempt 1 to 'sip:ipv6.sip.easybell.de' with client 'sip:12345@ipv6.sip.easybell.de'
[Feb  9 17:55:27] DEBUG[16382]: res_pjsip/pjsip_resolver.c:477 sip_resolve: Performing SIP DNS resolution of target 'ipv6.sip.easybell.de'
[Feb  9 17:55:27] DEBUG[16382]: res_pjsip/pjsip_resolver.c:504 sip_resolve: Transport type for target 'ipv6.sip.easybell.de' is 'UDP'
[Feb  9 17:55:27] DEBUG[16382]: res_pjsip/pjsip_resolver.c:547 sip_resolve: [0x7fb4680c6e50] Created resolution tracking for target 'ipv6.sip.easybell.de'
[Feb  9 17:55:27] DEBUG[16382]: res_pjsip/pjsip_resolver.c:177 sip_resolve_add: [0x7fb4680c6e50] Added target 'ipv6.sip.easybell.de' with record type '35', transport 'UDP', and port '5060'
[Feb  9 17:55:27] DEBUG[16382]: res_pjsip/pjsip_resolver.c:177 sip_resolve_add: [0x7fb4680c6e50] Added target '_sip._udp.ipv6.sip.easybell.de' with record type '33', transport 'UDP', and port '5060'
[Feb  9 17:55:27] DEBUG[16382]: res_pjsip/pjsip_resolver.c:177 sip_resolve_add: [0x7fb4680c6e50] Added target 'ipv6.sip.easybell.de' with record type '1', transport 'UDP', and port '5060'
[Feb  9 17:55:27] DEBUG[16382]: res_pjsip/pjsip_resolver.c:613 sip_resolve: [0x7fb4680c6e50] Starting initial resolution using parallel queries for target 'ipv6.sip.easybell.de'
[Feb  9 17:55:27] DEBUG[15146]: dns.c:559 ast_search_dns_ex: DNS search failed for ipv6.sip.easybell.de
[Feb  9 17:55:27] DEBUG[15146]: dns_system_resolver.c:157 dns_system_resolver_process_query: DNS search failed for query: 'ipv6.sip.easybell.de'
[Feb  9 17:55:27] DEBUG[15146]: dns.c:559 ast_search_dns_ex: DNS search failed for _sip._udp.ipv6.sip.easybell.de
[Feb  9 17:55:27] DEBUG[15146]: dns_system_resolver.c:157 dns_system_resolver_process_query: DNS search failed for query: '_sip._udp.ipv6.sip.easybell.de'
[Feb  9 17:55:27] DEBUG[15146]: res_pjsip/pjsip_resolver.c:277 sip_resolve_callback: [0x7fb4680c6e50] All parallel queries completed
[Feb  9 17:55:27] DEBUG[15146]: res_pjsip/pjsip_resolver.c:326 sip_resolve_callback: [0x7fb4680c6e50] A record received on target 'ipv6.sip.easybell.de'
[Feb  9 17:55:27] DEBUG[15146]: res_pjsip/pjsip_resolver.c:419 sip_resolve_callback: [0x7fb4680c6e50] Resolution completed - 1 viable targets
[Feb  9 17:55:27] DEBUG[15483]: res_pjsip/pjsip_resolver.c:201 sip_resolve_invoke_user_callback: [0x7fb4680c6e50] Address '0' is 195.185.37.60:5060 with transport 'UDP'
[Feb  9 17:55:27] DEBUG[15483]: res_pjsip/pjsip_resolver.c:207 sip_resolve_invoke_user_callback: [0x7fb4680c6e50] Invoking user callback with '1' addresses
[Feb  9 17:55:27] DEBUG[15483]: res_pjsip/pjsip_message_ip_updater.c:215 multihomed_on_tx_message: Re-wrote Contact URI host/port to 2a00:x:x:x::1:5060
[Feb  9 17:55:27] DEBUG[15483]: netsock2.c:172 ast_sockaddr_split_hostport: Splitting '[2a00:x:x:x::1]:5060' into...
[Feb  9 17:55:27] DEBUG[15483]: netsock2.c:226 ast_sockaddr_split_hostport: ...host '2a00:x:x:x::1' and port '5060'.
[Feb  9 17:55:27] DEBUG[15483]: netsock2.c:172 ast_sockaddr_split_hostport: Splitting '195.185.37.60:5060' into...
[Feb  9 17:55:27] DEBUG[15483]: netsock2.c:226 ast_sockaddr_split_hostport: ...host '195.185.37.60' and port '5060'.
[Feb  9 17:55:27] DEBUG[15483]: pjproject:0 <?>:        tsx0x7fb468035 Failed to send Request msg REGISTER/cseq=37962 (tdta0x7fb4500607b0)! err=120101 (Network is unreachable)
[Feb  9 17:55:27] DEBUG[15483]: res_pjsip_outbound_registration.c:930 sip_outbound_registration_response_cb: Received REGISTER response 503(Network is unreachable)
[Feb  9 17:55:27] DEBUG[15483]: res_pjsip_outbound_registration.c:787 handle_registration_response: Processing REGISTER response 503 from server 'sip:ipv6.sip.easybell.de' for client 'sip:12345@ipv6.sip.easybell.de'
[Feb  9 17:55:27] DEBUG[15483]: res_pjsip_outbound_registration.c:617 schedule_registration: Scheduling outbound registration to server 'sip:ipv6.sip.easybell.de' from client 'sip:12345@ipv6.sip.easybell.de' in 60 seconds
[Feb  9 17:55:27] WARNING[15483]: res_pjsip_outbound_registration.c:763 schedule_retry: No response received from 'sip:ipv6.sip.easybell.de' on registration attempt to 'sip:12345@ipv6.sip.easybell.de', retrying in '60'