Trunk-Group created ans SIP trunk in CUCM

[virendra pathak]

Hello Everyone,

I have a location where Trunk-group created in Voice gateway router and when i am checking SIP trunk status where it is showing the status "SIP Trunk Unknown - OPTIONS Ping not enabled " .

I am confused and wanted to know How SIP trunk establised with Trunk-Group on PRI interface.

I am sharing the log please let me know. 

How i will check during the troubleshoot? 

Thanks a lot.

interface Serial0/0/1:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn incoming-voice voice
isdn send-alerting
isdn negotiate-bchan
isdn sending-complete
isdn outgoing display-ie
isdn outgoing ie redirecting-number
trunk-group PSTN
no cdp enable
!
interface Serial0/1/0:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn incoming-voice voice
isdn send-alerting
isdn negotiate-bchan
isdn sending-complete
isdn outgoing display-ie
isdn outgoing ie redirecting-number
trunk-group PSTN
no cdp enable
!
interface Serial0/1/1:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn incoming-voice voice
isdn send-alerting
isdn negotiate-bchan
isdn sending-complete
isdn outgoing display-ie
isdn outgoing ie redirecting-number
no cdp enable

Regards

Viru

[Slavik Bialik · Accepted solution]

I'm not following you, what is the connection of your SIP trunk in CUCM to your PRIs? There's no connection at all between the two matters.

What I can tell you is only about the issue itself of the "Ping OPTIONS not enabled". You need to go to your SIP Profile configurations in the CUCM, and enable Ping OPTIONS, just check this options to enable: Enable OPTIONS Ping to monitor destination status for Trunks with Service Type "None (Default)".

Then, do Save and then Apply Config.

If you are using the default SIP Profile of the CUCM system in your SIP Trunk, I would advise you to go and make a Copy of the Standard SIP Profile, and enable it over there. Then go to your SIP trunk itself in CUCM, and choose your newly created SIP profile.

[virendra pathak]

Thanks  Slavik, for the prompt response.

Can you tell me How "Trunk-Group " work and how should i do the troubleshooting?

Regards

Viru.

[Slavik Bialik · Accepted solution]

Hi,

The trunk group configurations are very simple.

You first need to configure the trunk group itself, like that:

trunk group 1
 description PRIs to PSTN
 hunt-scheme sequential

Of course you can change the hunt scheme to be a different one. For example to be: round-robin or random.

Now, in the serial interfaces settings, you just add to each serial interface you want to assign to this trunk group, just put this line:

interface Serial0/0/1:15
  ...
  trunk-group 1 1

The first '1' is stating to which trunk-group number you want to assign this PRI.

And the second '1' colored in red, is stating the preference of this PRI in the trunk group.

So if you'll have 3 PRIs you'll just do:

interface Serial0/0/1:15
  ...
  trunk-group 1 1

interface Serial0/1/0:15
  ...
  trunk-group 1 2

interface Serial0/1/1:15
  ...
  trunk-group 1 3

Now in the dial-peer itself, that is redirecting towards the PSTN, just remove the port line that is targeting the port interface number, and put: trunkgroup 1

The troubleshooting is also simple, you can use the: debug isdn q931 and see in real-time what happens, like getting a new calls from the PRI and sending outbound calls from the PRIs. So you'll also see which interface and exact port was used for getting the call or for outbound the call.