[SR-Users] Kamailio IMS with ENUM

Thu Jun 25 04:29:04 CEST 2020

Hello

I may not describe the problem clearly. When a UE call a number to the
Kamailio IMS core, says, the number is 12345678, the R-URI in the SIP
INVITE is "sip:12345678;phone-context=ims.mnc001.mcc001.3gppnetwork.org at ims.mnc001.mcc001.3gppnetwork.org;user=phone",
Kamailio P-CSCF pass to INVITE to S-CSCF, and then S-CSCF pass to
I-CSCF, I-SCSF trigger LIR to HSS with Public-Identity = tel:12345678,
This IMPU did not provision in HSS, so HSS response  with
"DIAMATER_ERROR_USER_UNKNOWN".

On receiving this LIA, I-CSCF return to S-CSCF with "604 Does not
exist anywhere - HSS User Unknown", and then forward to P-CSCF and the
UE.

My question is why I-CSCF did not trigger a DNS/ENUM query after receiving LIA?

attached is the Kamailio configuration that we are using, please advise.

- RBK

On Wed, Jun 24, 2020 at 11:52 PM Valentin Christoph
<Christoph.Valentin at kontron.com> wrote:
>
> I don't know your DNS server nor your addressing plan. Probably to modify / add some zone files
>
> You must be sure to forward the ranges of telephone numbers that you want to forward to the other domain.
>
> Actually, it DID the request to the DNS/ENUM, but the result was "keep the domain as it is" or "replace it by the own domain"
>
> If the DNS/ENUM query did NOT succeed, then you would run into route(PSTN) and the request would be forwarded to "good old CS domain" to find a destination.
>
> -----Ursprüngliche Nachricht-----
> Von: sr-users <sr-users-bounces at lists.kamailio.org> Im Auftrag von BALL SUN
> Gesendet: Mittwoch, 24. Juni 2020 16:49
> An: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> Betreff: Re: [SR-Users] Kamailio IMS with ENUM
>
> yes. when the HSS profile is not found, it did not route to DNS/ENUM to check, which portion of configuration should I check?
>
> On Wed, Jun 24, 2020 at 5:31 PM Valentin Christoph <Christoph.Valentin at kontron.com> wrote:
> >
> > This means the HSS had answered the user is not known in this domain (lir_term_user_unknown), but then the DNS server insists this telephone number should be handled by our domain ($rd == NETWORKNAME).
> >
> > Just enter the user to the HSS database - if it shall be handled by
> > this domain -
> >
> > Or configure DNS, so that this telephone number is routed to another domain. - if it shall be handled by a different domain.
> >
> > -----Ursprüngliche Nachricht-----
> > Von: sr-users <sr-users-bounces at lists.kamailio.org> Im Auftrag von
> > BALL SUN
> > Gesendet: Dienstag, 23. Juni 2020 16:40
> > An: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> > Betreff: Re: [SR-Users] Kamailio IMS with ENUM
> >
> > Thanks. I actually keep having "604","Does not exist anywhere - HSS User Unknown", so by right, I-CSCF should go to check the ENUM, but it didn't so what configuration I should enable? is it dispatcher list and needed to enabkle PEERING? below is the routine that related to "604","Does not exist anywhere - HSS User Unknown" in icscf.
> >
> > - RBK
> >
> > route[lir_term_user_unknown]
> > {
> > if (uri =~ "tel:.*") {
> > # Let's check, if the number can be found in ENUM:
> > if(!enum_query()) {
> > # ENUM failed, send it to the PSTN-Gateway:
> > route(PSTN);
> > break;
> > }
> > # ENUM resolved to another domain
> > if ($rd != NETWORKNAME) {
> > t_on_reply("initial_request_reply");
> > t_on_failure("initial_request_failure");
> > if (!t_relay()) {
> > t_reply("500","Error forwarding to external domain"); exit; }; exit; } else { t_reply("604","Does not exist anywhere - HSS User Unknown"); exit; }; } else { # we received a request for our domain (non-tel), but HSS said "User Unknown"
> > if ($rd != NETWORKNAME) {
> > t_reply("604","Does not exist anywhere - HSS User Unknown"); exit; }
> > else { # try to forward non-tel request to other domain
> > t_on_reply("Initial_Request_reply");
> > t_on_failure("Initial_Request_failure");
> > if (!t_relay()) {
> > t_reply("500","Error forwarding to external domain"); exit; }; exit;
> > }; }; } }
> >
> > On Tue, Jun 23, 2020 at 8:40 PM Valentin Christoph <Christoph.Valentin at kontron.com> wrote:
> > >
> > > The  example I-CSCF and S-CSCF configurations at misc/examples/ims contain usage of the enum module, afaik.
> > > This could be easily adapted or taken as an example.
> > >
> > > -----Ursprüngliche Nachricht-----
> > > Von: sr-users <sr-users-bounces at lists.kamailio.org> Im Auftrag von
> > > BALL SUN
> > > Gesendet: Dienstag, 23. Juni 2020 08:53
> > > An: Kamailio (SER) - Users Mailing List
> > > <sr-users at lists.kamailio.org>
> > > Betreff: [SR-Users] Kamailio IMS with ENUM
> > >
> > > Hi
> > >
> > > Is there any information that can help to setup ENUM query in
> > > Kamailio IMS? what we wanted to achieve is to when A in domain A
> > > (the local
> > > domain) makes an INVITE to B, it will check the domain of B from ENUM backend.
> > >
> > > if it is not on the local domain, it will route to remote IMS core.
> > >
> > > Thanks
> > >
> > > - RBK
> > >
> > > _______________________________________________
> > > Kamailio (SER) - Users Mailing List
> > > sr-users at lists.kamailio.org
> > > https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fli
> > > st
> > > s.kamailio.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fsr-users&data=02
> > > %7
> > > C01%7Cchristoph.valentin%40kontron.com%7Cc6c88e565e844b41467208d8178
> > > 36
> > > ada%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637285200482063836&
> > > am
> > > p;sdata=YphpOloEosgWB9Gyt5xXH1COcafnRqMBDrLzhnRsM1o%3D&reserved=
> > > 0 _______________________________________________
> > > Kamailio (SER) - Users Mailing List
> > > sr-users at lists.kamailio.org
> > > https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fli
> > > st
> > > s.kamailio.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fsr-users&data=02
> > > %7
> > > C01%7Cchristoph.valentin%40kontron.com%7Cc6c88e565e844b41467208d8178
> > > 36
> > > ada%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637285200482063836&
> > > am
> > > p;sdata=YphpOloEosgWB9Gyt5xXH1COcafnRqMBDrLzhnRsM1o%3D&reserved=
> > > 0
> >
> > _______________________________________________
> > Kamailio (SER) - Users Mailing List
> > sr-users at lists.kamailio.org
> > https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist
> > s.kamailio.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fsr-users&data=02%7
> > C01%7Cchristoph.valentin%40kontron.com%7C4ca61d548b9b479aacc408d8184dd
> > 44b%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637286069835679064&am
> > p;sdata=ORTi4lWOImK5BqSxadSCxcviUwotzg9SvmoWzLVZnZA%3D&reserved=0
> > _______________________________________________
> > Kamailio (SER) - Users Mailing List
> > sr-users at lists.kamailio.org
> > https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist
> > s.kamailio.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fsr-users&data=02%7
> > C01%7Cchristoph.valentin%40kontron.com%7C4ca61d548b9b479aacc408d8184dd
> > 44b%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637286069835679064&am
> > p;sdata=ORTi4lWOImK5BqSxadSCxcviUwotzg9SvmoWzLVZnZA%3D&reserved=0
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.kamailio.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fsr-users&data=02%7C01%7Cchristoph.valentin%40kontron.com%7C4ca61d548b9b479aacc408d8184dd44b%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637286069835679064&sdata=ORTi4lWOImK5BqSxadSCxcviUwotzg9SvmoWzLVZnZA%3D&reserved=0
> _______________________________________________
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> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
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