The REGISTER request is OK.  There is no username included in REGISTER request.Regarding the mismatch: do you use NATURAL on your platform? Next step should be a tracefile (tcpdump) and later a debug-log from the node which shows the problem. Von Samsung-Tablet gesendet-------- Ursprüngliche Nachricht --------Von: sainath.ellendula(a)wipro.com Datum: 2016.02.09 08:05 (GMT+01:00) An: franz.edler(a)technikum-wien.at Cc: basitstar(a)hotmail.com, sr-users(a)lists.sip-router.org Betreff: RE: Re:[SR-Users] Kamailio IMS deployment Hi Franz,   Please find ping status and seems good.   root@server:~# ping -c 1 hss.net1.test PING hss.net1.test (10.0.0.9) 56(84) bytes of data. 64 bytes from server.net1.test (10.0.0.9): icmp_seq=1 ttl=64 time=0.017 ms   --- hss.net1.test ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.017/0.017/0.017/0.000 ms   root@server:~# ping -c 1 pcscf.net1.test PING pcscf.net1.test (10.0.0.10) 56(84) bytes of data. 64 bytes from server.net1.test (10.0.0.10): icmp_seq=1 ttl=64 time=0.020 ms   --- pcscf.net1.test ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.020/0.020/0.020/0.000 ms   root@server:~# ping -c 1 icscf.net1.test PING icscf.net1.test (10.0.0.11) 56(84) bytes of data. 64 bytes from server.net1.test (10.0.0.11): icmp_seq=1 ttl=64 time=0.018 ms   --- icscf.net1.test ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.018/0.018/0.018/0.000 ms   root@server:~# ping -c 1 scscf.net1.test PING scscf.net1.test (10.0.0.12) 56(84) bytes of data. 64 bytes from server.net1.test (10.0.0.12): icmp_seq=1 ttl=64 time=0.017 ms   --- scscf.net1.test ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.017/0.017/0.017/0.000 ms root@server:~#   Seems Some progress happened:   Tried register using Boghe IMS client and observed few errors:   0(1445) INFO: <script>:  [REGISTER] from [sip:alice@net1.test] to [sip:alice@net1.test] 0(1445) ERROR: <script>: REGISTER (sip:alice@net1.test (10.0.0.8:55280) to sip:alice@net1.test, 2006cdca-0076-bacb-5010-bffa714b3cdb) 0(1445) DEBUG: <core> [parser/msg_parser.c:153]: get_hdr_field(): get_hdr_field: cseq <CSeq>: <7994> <REGISTER> 0(1445) DEBUG: <core> [parser/msg_parser.c:187]: get_hdr_field(): DEBUG: get_hdr_body : content_length=0 0(1445) DEBUG: maxfwd [mf_funcs.c:85]: is_maxfwd_present(): value = 70 0(1445) DEBUG: <core> [parser/msg_parser.c:89]: get_hdr_field(): found end of header 0(1445) DEBUG: sanity [mod_sanity.c:248]: w_sanity_check(): sanity checks result: 1 0(1445) DEBUG: siputils [checks.c:97]: has_totag(): no totag 0(1445) DEBUG: <core> [select.c:412]: run_select(): Calling SELECT 0x7fb548dd2400 0(1445) DEBUG: tm [t_lookup.c:1011]: t_check_msg(): DEBUG: t_check_msg: msg id=2 global id=1 T start=0xffffffffffffffff 0(1445) DEBUG: tm [t_lookup.c:466]: t_lookup_request(): t_lookup_request: start searching: hash=65064, isACK=0 0(1445) DEBUG: tm [t_lookup.c:424]: matching_3261(): DEBUG: RFC3261 transaction matching failed 0(1445) DEBUG: tm [t_lookup.c:648]: t_lookup_request(): DEBUG: t_lookup_request: no transaction found 0(1445) DEBUG: tm [t_lookup.c:1080]: t_check_msg(): DEBUG: t_check_msg: msg id=2 global id=2 T end=(nil) 0(1445) DEBUG: sl [sl.c:280]: send_reply(): reply in stateless mode (sl) 0(1445) DEBUG: siputils [checks.c:97]: has_totag(): no totag 0(1445) DEBUG: tm [t_lookup.c:1011]: t_check_msg(): DEBUG: t_check_msg: msg id=2 global id=2 T start=(nil) 0(1445) DEBUG: tm [t_lookup.c:1086]: t_check_msg(): DEBUG: t_check_msg: T previously sought and not found 0(1445) DEBUG: ims_registrar_pcscf [save.c:273]: save_pending(): contact requesting to expire in 600000 seconds 0(1445) DEBUG: ims_usrloc_pcscf [usrloc.c:106]: get_alias_host_from_contact(): no alias param 0(1445) DEBUG: ims_usrloc_pcscf [usrloc.c:155]: get_hash_slot(): using host for hash [10.0.0.8] 0(1445) DEBUG: ims_usrloc_pcscf [usrloc.c:159]: get_hash_slot(): Returning hash slot: [167] 0(1445) DEBUG: ims_usrloc_pcscf [udomain.c:465]: get_pcontact(): Searching for contact in P-CSCF usrloc [sip:alice@10.0.0.8:55280;transport=udp] 0(1445) DEBUG: ims_usrloc_pcscf [usrloc.c:106]: get_alias_host_from_contact(): no alias param 0(1445) DEBUG: ims_usrloc_pcscf [usrloc.c:183]: get_aor_hash(): using host for hash [10.0.0.8] 0(1445) DEBUG: ims_usrloc_pcscf [usrloc.c:187]: get_aor_hash(): Returning hash slot: [1662767783] 0(1445) DEBUG: ims_usrloc_pcscf [udomain.c:483]: get_pcontact(): Comparing needle user@host:port [alice@10.0.0.8:55280] and contact_user@contact_host:port [alice@10.0.0.8:51219] 0(1445) DEBUG: ims_usrloc_pcscf [udomain.c:494]: get_pcontact(): Searching for [sip:alice@10.0.0.8:55280;transport=udp] and comparing to [sip:alice@10.0.0.8:51219;transport=udp] 0(1445) DEBUG: ims_usrloc_pcscf [udomain.c:553]: get_pcontact(): Port don't match: 51219 (contact) 51219 (received) != 55280! 0(1445) DEBUG: ims_registrar_pcscf [save.c:310]: save_pending(): Adding pending pcontact: <sip:alice@10.0.0.8:55280;transport=udp> 0(1445) DEBUG: ims_usrloc_pcscf [pcontact.c:132]: new_pcontact(): New contact [<sip:alice@10.0.0.8:55280;transport=udp>] with 0 associated IMPUs in state: [registration pending] 0(1445) DEBUG: ims_registrar_pcscf [save.c:314]: save_pending(): registering for UL callback 0(1445) DEBUG: ims_usrloc_pcscf [usrloc.c:106]: get_alias_host_from_contact(): no alias param   Please guide me for any more changes has to be done, As observed in Wireshark(Register request from 10.0.0.8(host)-PCSCF as REGISTER sip:net1.test SIP/2.0). I think the register request should sent as REGISTER sip:alice@net1.test SIP/2.0   Thanks in advance!!   Regards, Sainath   From: Franz Edler [mailto:franz.edler@technikum-wien.at] Sent: Tuesday, February 9, 2016 3:00 AM To: Sainath Ellendula (NEP) &lt;sainath.ellendula(a)wipro.com&gt; Cc: basitstar(a)hotmail.com; sr-users(a)lists.sip-router.org Subject: RE: Re:[SR-Users] Kamailio IMS deployment   Sainath,   what was the result for ping on - icsct.net1.test - scscf.net1.test - hss.net1.test   to increase debug level you have to modify the corresponding cfg-file, e.g. kamailio-icscf.cfg in line 35: debug=2 Just increase to debug=3 and then start the process again.   BR Franz The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. 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