utils ctl commands (set-cluster mixed-mode, set-cluster non-secure-mode, update CTLFile) run only on the publisher, and encrypted and authenticated phones must be reset for CTL updates to take effect.
Checked 2026-10-01
Ensure that you reset all the Encrypted and Authenticated phones for the CTL file updates to take effect.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- CTL
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 15 and SUs
- Checked
- 2026-10-01
Sources
- Command Line Interface Reference Guide for Cisco Unified Communications Solutions, Release 15 and SUs - Utils Commands — Cisco Systems · tier 2 current vendor documentation · utils ctl command entry (requirements and usage guidelines)
Cite this note
APA
WarmTransfer. (2026, October 1). Troubleshooting phone trust and ITL failures in Unified CM: source note cucm-itl-trust-troubleshooting-utils-ctl-publisher. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-itl-trust-troubleshooting-utils-ctl-publisher
BibTeX
@misc{warmtransfer-claim-cucm-itl-trust-troubleshooting-utils-ctl-publisher,
title = {Troubleshooting phone trust and ITL failures in Unified CM: source note cucm-itl-trust-troubleshooting-utils-ctl-publisher},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-itl-trust-troubleshooting-utils-ctl-publisher},
note = {Source note cucm-itl-trust-troubleshooting-utils-ctl-publisher, checked 2026-10-01}
}