CUCM Upgrade May cause Host Name Issue

Author
William Bell
Vice President, Solutions and Products

The Issue.

I encountered an issue testing a DMA migration from Call Manager 4.1.3 to CUCM 6.1.3bSU1.  In this upgrade the first node is loaded using a 6.1.3b DVD image and a mid-install patch (SU1) is applied.  During the installation of 6.1.3, the host name and IP address are specified with different values than used by the 4.1.3 publisher.

Installation completed successfully and license files could be installed/uploaded without issue.  When attempting to load services however the following errors were seen:

>show network cluster

When ran on the 6.1 publisher, the output of this command showed the “old” hostname and “new” IP address.  Further, the “old” publisher is listed as a subscriber.

>show tech network host

You will see the “old” publisher name in the hosts file but the “new” publisher name is not

>From the platform web interface show>system has the correct hostname information

>From the Unified Reporting portal, the Database Replication status reports shows various errors related to invalid host names

In addition to the above symptoms, any attempt to start the TFTP service fails.  The Call Manager, IP Voice Media Streaming, CTI Manager, and other application services will start but will immediately crash.

The Solution.

Clearly something is amiss with the installation wizard.  In other versions, it is noted that the install wizard will actually confirm with the installer that they intend to change the IP address/host name.  To resolve this issue, use the following command from the console:

>set network hostname <newpublisherhostname>

After issuing this command, reset the publisher node.

Status for Other Versions.

5.1 : Issue not seen

6.1: Issue found.

7.x: Issue not seen

Recently I tested this with CUCM 7.1(2) and I did not have the same issue.  I tested with CUCM 6.1(3) on multiple occassions and experienced the issue.

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Nick Kelly

Cybersecurity Engineer, Cisco

Nick has over 20 years of experience in Security Operations and Security Sales. He is an avid student of cybersecurity and regularly engages with the Infosec community at events like BSides, RVASec, Derbycon and more. The son of an FBI forensics director, Nick holds a B.S. in Criminal Justice and is one of Cisco’s Fire Jumper Elite members. When he’s not working, he writes cyberpunk and punches aliens on his Playstation.

 

Virgilio “BONG” dela Cruz Jr.

CCDP, CCNA V, CCNP, Cisco IPS Express Security for AM/EE
Field Solutions Architect, Tech Data

Virgilio “Bong” has sixteen years of professional experience in IT industry from academe, technical and customer support, pre-sales, post sales, project management, training and enablement. He has worked in Cisco Technical Assistance Center (TAC) as a member of the WAN and LAN Switching team. Bong now works for Tech Data as the Field Solutions Architect with a focus on Cisco Security and holds a few Cisco certifications including Fire Jumper Elite.

 

John Cavanaugh

CCIE #1066, CCDE #20070002, CCAr
Chief Technology Officer, Practice Lead Security Services, NetCraftsmen

John is our CTO and the practice lead for a talented team of consultants focused on designing and delivering scalable and secure infrastructure solutions to customers across multiple industry verticals and technologies. Previously he has held several positions including Executive Director/Chief Architect for Global Network Services at JPMorgan Chase. In that capacity, he led a team managing network architecture and services.  Prior to his role at JPMorgan Chase, John was a Distinguished Engineer at Cisco working across a number of verticals including Higher Education, Finance, Retail, Government, and Health Care.

He is an expert in working with groups to identify business needs, and align technology strategies to enable business strategies, building in agility and scalability to allow for future changes. John is experienced in the architecture and design of highly available, secure, network infrastructure and data centers, and has worked on projects worldwide. He has worked in both the business and regulatory environments for the design and deployment of complex IT infrastructures.