CUBE configuration

[bkhanal1971]

I am learning basics of SIP trunking and CUBE configuration. I have configured one interface in my CUBE router with the private IP address (10.x.x.x which is in the same subnet as my CUCM servers are) and provided that to my ITSP (Level 3) . Then they provided me two public IP addresses, one for signalling and another for media. I am trying to understand where I configure those IPs in the CUBE. Do I have to create loopback interfaces? Or is there any other better ways? We have MPLS VPN from the same ITSP.

In addition to that, I also want to test faxing over the sip trunk. i have a bunch of faxes connected to VG-224s and eventually to telco through PRIs. If I want to test faxing over SIP, do I configure one of the fax machines as a third party sip device in CUCM or how/where do I connect them? I am trying to understand the basics. Thank you for your help. Khanal

[Dennis Fogler · Accepted solution]

The signaling ip address that Level 3 gave you should be used in your dial-peer in the session target ipv4:<signaling ip address here>  command.   Level 3 should return the ip address that they want the media sent to in the 200 OK message, therefore you should not need to configure the media ip address in the CUBE.   You just need to make sure that address is reachable from the CUBE.

On the fax issue, Communications Manager will take care of the protocol inter-networking between the FAX devices and the SIP Trunk.  You will need to configure the cube for fax over SIP.   The Level 3 Cisco CUBE interoperability Guide has a section on what you need to configure for fax.   I have provided the link for you below.

http://www.cisco.com/c/dam/en/us/solutions/collateral/enterprise/unified-border-element-cube/906625.pdf

Let me know if this helps.   -Dennis

[bkhanal1971]

Thank you so much Dennis. I am clear about the concept now. And also thanks for the link. Will post further questions if I encounter any issues along the way.