CME SIP dn registraion to ITSP, no-reg not working!

[mileslevi89]

I have a SIP phone registered to CME on 12.4 Ive tried everything to keep the phone from trying to register to the ITSP 

I have tried: voice register dn, no-reg. Still trying to register to ITSP.
I tried: voice register global, max-dn 15 no-reg both resulting in an invalid command.
Also: telephony-service, no auto-reg-ephone but that didnt work either.

r#show sip-ua register status
Line peer expires(sec) registered
================================ ========== ============ ==========
1003 40001 46 no
247121 -1 2196 yes

Received:
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK87791E8E;received=xxx.xxx.xxx.xxx;rport=21834
From: <sip:1003@xxx.xxx.xxx.xxx>;tag=1ED10750-195F
To: <sip:1003@xxx.xxx.xxx.xxx>;tag=as6a7dfea5
Call-ID: DBD31A66-5B3511ED-A0DFA617-75C059C4
CSeq: 484 REGISTER
Server: voip.ms
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
WWW-Authenticate: Digest algorithm=MD5, realm="seattle.voip.ms", nonce="5706cd39"
Content-Length: 0

[Roger Kallberg]

If you’re using registration for the SIP trunk from your ITSP you’d need to use tenant configuration for this to define the registrar for the trunk. This is because the registrar defined under sip-ua is global and needs to be set to the CME for the SIP phones to register with CME. If you need help with what to change please share your running configuration so that we can suggest the appropriate changes.

[qaidfor]

similar issue with me, and i'm unable to resolve it 

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[Roger Kallberg]

If you share your running configuration we can advise you on what you’ll need to do.

[Rajan]

Hi,

If your SIP trunk registration is using an outbound proxy, then you can also try the below:

voice register global
no outbound-proxy

Make sure to do a "create profile" after this.

HTH
Rajan
Please mark all useful posts as helpful and solutions as accepted wherever applicable

[edwardforgacs]

I wonder if you ever resolved this? I agree, the no-reg commands seem to have no effect whatsoever on certain dns.

I have also tried using a tenant which made no effect, it repeatedly tries to register certain dns to that tenant.

[Roger Kallberg]

If you share your running configuration we can advise you on what you’ll need to modify.

[edwardforgacs]

It was fixed by a reload, and by re-applying the no-reg both commands to some of the ephone-dns. I'm going to have to conclude it was a bug (one of many) in CME.

Under show telephony-service dial-peer, some dial-peers were missing no e164 registration despite having no-reg both. This was fixed for some of them by re-entering the same number command under ephone-dn, but there were a couple of stubborn entries which would not disappear from sh sip-ua register status until it was reloaded.

My main concern is whether those phantom registrations will come back. I checked and the no-reg both change does appear to have persisted after a reload.