Source note · Voice VLAN and LLDP-MED and CDP and PoE for IP phones
Cisco's 8800 admin guide for Unified CM recommends DHCP custom option 150, set to the TFTP server IP address, and falls back to DHCP option 66 if option 150 cannot be used.
Checked 2026-09-24
If you cannot use option 150, you may try using DHCP option 66.
- Vendor
- Cisco
- Product
- Cisco IP Phone 8800 Series
- Subsystem
- DHCP / TFTP discovery
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager - Technical Details — Cisco Systems · tier 2 current vendor documentation · Technical Details > Network Protocols (DHCP / TFTP entries)
Cite this note
APA
WarmTransfer. (2026, September 24). Voice VLAN and LLDP-MED and CDP and PoE for IP phones: source note voice-vlan-lldp-poe-8800-dhcp-option-150. WarmTransfer. https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-8800-dhcp-option-150
BibTeX
@misc{warmtransfer-claim-voice-vlan-lldp-poe-8800-dhcp-option-150,
title = {Voice VLAN and LLDP-MED and CDP and PoE for IP phones: source note voice-vlan-lldp-poe-8800-dhcp-option-150},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-8800-dhcp-option-150},
note = {Source note voice-vlan-lldp-poe-8800-dhcp-option-150, checked 2026-09-24}
}