SRST fallback not working

[amarjeets]

Hey Community,

So, I configured SRST fallback on my 8200L router, which I will be using as a voice gateway for my site, but whenever I try the fallback mechanism, it doesn't work and the IP phone stays stuck on verify your network connection. I have used my old config which we use on 4331 routers, but it doesn't work, can you point out what I am doing wrong. I have attached my config on this thread.

[Carlo Poggiarelli]

Hi,

On your config you used sccp port 2000 on voice register global which is dedicated for sip phones registration.

Please change that port with 5060

Also under voice service viop

sip 

Add the following line

registrar server expires max 600 min 60

If still not working, please activate a debug ccsip message and post the output when trying to switch to srst

HTH

Regards 

Carlo

[amarjeets]

Hi @Carlo Poggiarelli 

These are the messages which I found in my logs after turning debugging on for ccsip messages:

000623: Nov 6 15:36:50.500 EST: //16/0C27CA7C800F/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.7.10.2:5060;branch=z9hG4bK5140e7a6
From: <sip:2815@10.7.8.4>;tag=b000b4bbc95a002020f8f2db-4fa1ad7e
To: <sip:2815@10.7.8.4>;tag=FC317A9-FCD
Date: Mon, 06 Nov 2023 20:36:50 GMT
Call-ID: b000b4bb-c95a016c-16453f9a-5ed79378@10.7.10.2
Server: Cisco-SIPGateway/IOS-17.11.1a
CSeq: 113 REGISTER
Supported: X-cisco-cme-sis-9.0.0
Supported: X-cisco-srtp-fallback
Contact: <sip:2815@10.7.10.2:5060>;expires=600;x-cisco-newreg
Expires: 600
Content-Type: application/x-cisco-remotecc-response+xml
Content-Length: 267

<?xml version="1.0" encoding="UTF-8"?><x-cisco-remotecc-response><response><code>200</code><optionsind><srstoption><sharedline>enable</sharedline><blfspeeddial>enable</blfspeeddial><video>enable</video></srstoption></optionsind></response></x-cisco-remotecc-response>

[Carlo Poggiarelli]

Hi

the debug output is not complete, I cannot see the register message from ip phone.

Please send the complete debug.

Also please send the output of a show sip-ua status registrar command.

Thanks a lot

Regards

Carlo

[amarjeets]

Hi @Carlo Poggiarelli 

This is the output for sip-ua command, and the logs which I got after running debugging.

VG#sh sip-ua status
SIP User Agent Status
SIP User Agent for UDP : ENABLED
SIP User Agent for TCP : ENABLED

SIP User Agent for TLS over TCP : ENABLED
SIP User Agent bind status(signaling): ENABLED 10.7.8.4
SIP User Agent bind status(media): ENABLED 10.7.8.4
SIP early-media for 180 responses with SDP: ENABLED
SIP max-forwards : 70
SIP DNS SRV version: 2 (rfc 2782)
NAT Settings for the SIP-UA
Role in SDP: NONE
Check media source packets: DISABLED
Maximum duration for a telephone-event in NOTIFYs: 2000 ms
SIP support for ISDN SUSPEND/RESUME: ENABLED
Redirection (3xx) message handling: ENABLED
Reason Header will override Response/Request Codes: ENABLED
Out-of-dialog Refer: DISABLED
Presence support is DISABLED
Xfer target is dial-peer
protocol mode is ipv4

SDP application configuration:
Version line (v=) required
Owner line (o=) required
Timespec line (t=) required
Media supported: audio video image
Network types supported: IN
Address types supported: IP4 IP6
Transport types supported: RTP/AVP udptl
Extra fmtp params supported: none
Application specified attributes supported: none

LOGS-----------------------------------------------------------------
000620: Nov 6 15:36:50.496 EST: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
REGISTER sip:10.7.8.4 SIP/2.0
Via: SIP/2.0/UDP 10.7.10.2:5060;branch=z9hG4bK5140e7a6
From: <sip:2815@10.7.8.4>;tag=b000b4bbc95a002020f8f2db-4fa1ad7e
To: <sip:2815@10.7.8.4>
Call-ID: b000b4bb-c95a016c-16453f9a-5ed79378@10.7.10.2
Max-Forwards: 70
Session-ID: bca21fe200105000a000b000b4bbc95a;remote=00000000000000000000000000000000
Date: Mon, 06 Nov 2023 20:36:24 GMT
CSeq: 113 REGISTER
User-Agent: Cisco-CP8851/14.2.1
Contact: <sip:1872a182-290d-4424-b71f-7a84377ece0e@10.7.10.2:5060;transport=udp>;+sip.instance="<urn:uuid:00000000-0000-0000-0000-b000b4bbc95a>";+u.sip!devicename.ccm.cisco.com="SEPB000B4BBC95A";+u.sip!model.ccm.cisco.com="684"
Supported: extended-refer,norefersub,X-cisco-srtp-fallback,X-cisco-config,X-cisco-sis-7.0.0,X-cisco-xsi-8.5.1
Content-Length: 0
Reason: SIP;cause=200;text="cisco-alarm:10 Name=SEPB000B4BBC95A ActiveLoad=sip88xx.14-2-1-0001-14.loads InactiveLoad=sip88xx.14-2-1-0101-26.loads Last=tcp_timeout"
Expires: 3600

000621: Nov 6 15:36:50.498 EST: VOICE REGISTER POOL-1 has registered. Name: IP:10.7.10.2 DeviceType:Phone-

000622: Nov 6 15:36:50.498 EST: %SIPPHONE-6-REGISTER: VOICE REGISTER POOL-1 has registered. Name: IP:10.7.10.2 DeviceType:Phone-

000623: Nov 6 15:36:50.500 EST: //16/0C27CA7C800F/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.7.10.2:5060;branch=z9hG4bK5140e7a6
From: <sip:2815@10.7.8.4>;tag=b000b4bbc95a002020f8f2db-4fa1ad7e
To: <sip:2815@10.7.8.4>;tag=FC317A9-FCD
Date: Mon, 06 Nov 2023 20:36:50 GMT
Call-ID: b000b4bb-c95a016c-16453f9a-5ed79378@10.7.10.2
Server: Cisco-SIPGateway/IOS-17.11.1a
CSeq: 113 REGISTER
Supported: X-cisco-cme-sis-9.0.0
Supported: X-cisco-srtp-fallback
Contact: <sip:2815@10.7.10.2:5060>;expires=600;x-cisco-newreg
Expires: 600
Content-Type: application/x-cisco-remotecc-response+xml
Content-Length: 267

<?xml version="1.0" encoding="UTF-8"?><x-cisco-remotecc-response><response><code>200</code><optionsind><srstoption><sharedline>enable</sharedline><blfspeeddial>enable</blfspeeddial><video>enable</video></srstoption></optionsind></response></x-cisco-remotecc-response>

[Carlo Poggiarelli]

Hi.

Thank for the output.

The other command i needis show sip-ua status registrar.

Thanks

 Carlo

[amarjeets]

Good morning, Carlo,

This is the output

VG#sh sip-ua status registrar
Line destination expires(sec) contact
transport call-id
peer
=============================================================================================================
* TLS without client validation

[Jonathan Schulenberg]

SRST requires DNA Advantage licensing to work on the Cat8k. Have you enabled that and confirmed the router has successfully checked in (received an ACK) from Smart Licensing Manager?

[amarjeets]

Hello Jonathan,

Yes we did purchase advantage license, but I pushed ack manually from smart license manager,

You can check my license status as below:

VG#sh license status
Utility:
Status: DISABLED

Smart Licensing Using Policy:
Status: ENABLED

Account Information:
Smart Account: XXX As of Nov 03 13:41:50 2023 EST
Virtual Account: DEFAULT

Data Privacy:
Sending Hostname: yes
Callhome hostname privacy: DISABLED
Smart Licensing hostname privacy: DISABLED
Version privacy: DISABLED

Transport:
Type: Transport Off

Policy:
Policy in use: Merged from multiple sources.
Reporting ACK required: yes (CISCO default)
Unenforced/Non-Export Perpetual Attributes:
First report requirement (days): 365 (CISCO default)
Reporting frequency (days): 0 (CISCO default)
Report on change (days): 90 (CISCO default)
Unenforced/Non-Export Subscription Attributes:
First report requirement (days): 90 (CISCO default)
Reporting frequency (days): 90 (CISCO default)
Report on change (days): 90 (CISCO default)
Enforced (Perpetual/Subscription) License Attributes:
First report requirement (days): 0 (CISCO default)
Reporting frequency (days): 0 (CISCO default)
Report on change (days): 0 (CISCO default)
Export (Perpetual/Subscription) License Attributes:
First report requirement (days): 0 (CISCO default)
Reporting frequency (days): 0 (CISCO default)
Report on change (days): 0 (CISCO default)

Miscellaneous:
Custom Id: <empty>

Usage Reporting:
Last ACK received: Nov 03 14:00:04 2023 EST
Next ACK deadline: Feb 01 14:00:04 2024 EST
Reporting push interval: 30 days
Next ACK push check: <none>
Next report push: Nov 06 15:14:34 2023 EST
Last report push: <none>
Last report file write: <none>

Trust Code Installed: Oct 12 19:14:27 2023 EST

Device Telemetry Report Summary:
================================
Data Channel: NOT AVAILABLE
Reports on disk: 0

[amarjeets]

Hello,

SRST is working now, it was just a careless mistake of testing the functionality incorrectly. 

Thank you so much for your help @Carlo Poggiarelli @Jonathan Schulenberg