If the Cisco Unified CM or TFTP services are stopped, devices that depend on them cannot start up. Cisco's fix is to start the service from Cisco Unified Serviceability > Tools > Control Center - Feature Services.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- TFTP service
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager - Troubleshooting — Cisco Systems · tier 2 current vendor documentation · Cisco Unified Communications Manager and TFTP Services Are Not Running; Troubleshooting Procedures > Start Service
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting IP phones that do not get a voice VLAN or DHCP options: source note ip-phone-dhcp-vlan-troubleshooting-tftp-service-stopped. WarmTransfer. https://warmtransfer.net/knowledge/claims/ip-phone-dhcp-vlan-troubleshooting-tftp-service-stopped
BibTeX
@misc{warmtransfer-claim-ip-phone-dhcp-vlan-troubleshooting-tftp-service-stopped,
title = {Troubleshooting IP phones that do not get a voice VLAN or DHCP options: source note ip-phone-dhcp-vlan-troubleshooting-tftp-service-stopped},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ip-phone-dhcp-vlan-troubleshooting-tftp-service-stopped},
note = {Source note ip-phone-dhcp-vlan-troubleshooting-tftp-service-stopped, checked 2026-10-02}
}