Source note · Voice VLAN and LLDP-MED and CDP and PoE for IP phones
After a Cisco 8800 phone reboots, the switch locks power negotiation to whichever protocol, CDP or LLDP, carries the phone's first power TLV.
Checked 2026-09-24
After a phone reboots, the switch locks to one protocol (CDP or LLDP) for power negotiation.
- Vendor
- Cisco
- Product
- Cisco IP Phone 8800 Series
- Subsystem
- PoE negotiation
- 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 > Power Negotiation Over LLDP
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-power-protocol-lock. WarmTransfer. https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-8800-power-protocol-lock
BibTeX
@misc{warmtransfer-claim-voice-vlan-lldp-poe-8800-power-protocol-lock,
title = {Voice VLAN and LLDP-MED and CDP and PoE for IP phones: source note voice-vlan-lldp-poe-8800-power-protocol-lock},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-8800-power-protocol-lock},
note = {Source note voice-vlan-lldp-poe-8800-power-protocol-lock, checked 2026-09-24}
}