CUCM Cluster Changed from Mixed Mode to Non-Secure Mode Configuration Example

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/118892-config-cucm-00.html

Published

2015-04-10

Updated

unknown

Accessed

2026-09-30

HTTP status

200

License

Cisco documentation; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• A tokenless mixed-mode cluster is returned to non-secure mode by running utils ctl set-cluster non-secure-mode on the publisher. in context
• After a change to non-secure mode the CTL file still exists on servers and phones but contains no CCM+TFTP server certificates, and Cisco recommends deleting the CTL file from phones to avoid problems if certificates or cluster topology later change. in context
• After changing to non-secure mode, the TFTP and Cisco CallManager services must be restarted on all nodes that run them and all IP phones restarted to download the updated CTL file. in context
• The CTL file on a phone can be checked under Settings > Security Configuration > Trust List > CTL File and its checksum compared with the output of show ctl. in context

Cite this source record

APA

WarmTransfer. (2015, April 10). CUCM Cluster Changed from Mixed Mode to Non-Secure Mode Configuration Example. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-technote-118892-mixed-to-nonsecure

BibTeX

@misc{warmtransfer-cisco-technote-118892-mixed-to-nonsecure,
  title  = {CUCM Cluster Changed from Mixed Mode to Non-Secure Mode Configuration Example},
  author = {{WarmTransfer}},
  year   = {2015},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-technote-118892-mixed-to-nonsecure},
  note   = {Cisco Systems, accessed 2026-09-30}
}