Dear All

I have tried a lot and looks getting Kamailio IMS setup is very difficult and no proper documentation available. Though I have setup all CSCFs and FHoSS , still REGISTRATION fails with 483 response.

I have setup DNS properly as shown below.

root@necs04:/etc/kamailio/pcscf#
root@necs04:/etc/kamailio/pcscf# ping pcscf.group1-imslab11.in
PING pcscf.group1-imslab11.in (192.168.1.100) 56(84) bytes of data.
64 bytes from localhost (192.168.1.100): icmp_req=1 ttl=64 time=0.037 ms
64 bytes from localhost (192.168.1.100): icmp_req=2 ttl=64 time=0.028 ms
^C
--- pcscf.group1-imslab11.in ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.028/0.032/0.037/0.007 ms
root@necs04:/etc/kamailio/pcscf#
root@necs04:/etc/kamailio/pcscf#
root@necs04:/etc/kamailio/pcscf#
root@necs04:/etc/kamailio/pcscf# ping icscf.group1-imslab11.in
PING icscf.group1-imslab11.in (192.168.1.100) 56(84) bytes of data.
64 bytes from localhost (192.168.1.100): icmp_req=1 ttl=64 time=0.023 ms
64 bytes from localhost (192.168.1.100): icmp_req=2 ttl=64 time=0.029 ms
64 bytes from localhost (192.168.1.100): icmp_req=3 ttl=64 time=0.024 ms
^C
--- icscf.group1-imslab11.in ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1999ms
rtt min/avg/max/mdev = 0.023/0.025/0.029/0.004 ms
root@necs04:/etc/kamailio/pcscf#
root@necs04:/etc/kamailio/pcscf# ping scscf.group1-imslab11.in
PING scscf.group1-imslab11.in (192.168.1.100) 56(84) bytes of data.
64 bytes from localhost (192.168.1.100): icmp_req=1 ttl=64 time=0.022 ms
64 bytes from localhost (192.168.1.100): icmp_req=2 ttl=64 time=0.022 ms
64 bytes from localhost (192.168.1.100): icmp_req=3 ttl=64 time=0.021 ms
^C
--- scscf.group1-imslab11.in ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 0.021/0.021/0.022/0.005 ms
root@necs04:/etc/kamailio/pcscf#

Also dig result is as shown below.

root@necs04:/etc/kamailio/pcscf#
root@necs04:/etc/kamailio/pcscf# dig naptr group1-imslab11.in

; <<>> DiG 9.8.1-P1 <<>> naptr group1-imslab11.in
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10919
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 3

;; QUESTION SECTION:
;group1-imslab11.in.        IN    NAPTR

;; ANSWER SECTION:
group1-imslab11.in.    86400    IN    NAPTR    10 50 "s" "SIP+D2T" "" _sip._tcp.pcscf.group1-imslab11.in.
group1-imslab11.in.    86400    IN    NAPTR    10 50 "s" "SIP+D2U" "" _sip._udp.pcscf.group1-imslab11.in.

;; AUTHORITY SECTION:
group1-imslab11.in.    86400    IN    NS    necs04.group1-imslab11.in.

;; ADDITIONAL SECTION:
pcscf.group1-imslab11.in. 86400    IN    A    192.168.1.100
necs04.group1-imslab11.in. 86400 IN    A    192.168.1.100
_sip._udp.pcscf.group1-imslab11.in. 86400 IN SRV 0 0 4060 pcscf.group1-imslab11.in.

;; Query time: 0 msec
;; SERVER: 192.168.1.100#53(192.168.1.100)
;; WHEN: Fri Oct 17 17:34:22 2014
;; MSG SIZE rcvd: 259

root@necs04:/etc/kamailio/pcscf#

When I send a REGISTER message from a sip client, I get 483 Too Many Hops.

I am totally clueless whats going wrong.

Can somebody guide me , where is the fault.

On thing I do not understand is dispatcher.list stuff.

So I have kept empty disptacher.list file for PCSCF and SCSCF.

Can that be an issue.

The REGISTER and 483 response looks as below.

REGISTER sip:pcscf.group1-imslab11.in SIP/2.0
Via: SIP/2.0/TCP 192.168.1.114:49732;branch=z9hG4bK457115572
From: <sip:necs_0@group1-imslab11.in>;tag=1068512852
To: <sip:necs_0@group1-imslab11.in>
Call-ID: 1874336526
CSeq: 16 REGISTER
Contact: <sip:necs_0@192.168.1.114:49732;transport=TCP;line=a126427bb8e82c9>;+sip.instance="<urn:uuid:2dab9970-55f5-11e4-ae19-41032d8f6492>"
Authorization: Digest username="necs_0@group1-imslab11.in", realm="pcscf.group1-imslab11.in", nonce=" ", uri="sip:pcscf.group1-imslab11.in", response=" "
Max-Forwards: 70
User-Agent: NECS IMS client v1.01
Expires: 600000
Supported: path
Supported: gruu
Content-Length: 0

SIP/2.0 483 Too Many Hops
Via: SIP/2.0/TCP 192.168.1.114:49732;branch=z9hG4bK457115572
From: <sip:necs_0@group1-imslab11.in>;tag=1068512852
To: <sip:necs_0@group1-imslab11.in>;tag=68c95b6520b8472128534dfbca9fcb81.d739
Call-ID: 1874336526
CSeq: 16 REGISTER
Server: Kamailio P-CSCF
Content-Length: 0

Kindly somebody help me how I can troubleshoot and fix it.

Many thanks

Kamal