Source note · Voice VLAN and LLDP-MED and CDP and PoE for IP phones
The Catalyst 9300 guide says that when CDP and LLDP both run on a switch, LLDP must be disabled on interfaces that use CDP for power negotiation, for example with no lldp tlv-select power-management or no lldp transmit and no lldp receive.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Catalyst 9300 Series Switches
- Subsystem
- LLDP / CDP / PoE
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.17.x
- Checked
- 2026-09-24
Sources
- Interface and Hardware Components Configuration Guide, Cisco IOS XE 17.17.x (Catalyst 9300 Switches) - Configuring LLDP, LLDP-MED, and Wired Location Service — Cisco Systems · tier 2 current vendor documentation · Configuring LLDP, LLDP-MED, and Wired Location Service > LLDP and Cisco Discovery Protocol / power negotiation note
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-c9300-cdp-lldp-power. WarmTransfer. https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-c9300-cdp-lldp-power
BibTeX
@misc{warmtransfer-claim-voice-vlan-lldp-poe-c9300-cdp-lldp-power,
title = {Voice VLAN and LLDP-MED and CDP and PoE for IP phones: source note voice-vlan-lldp-poe-c9300-cdp-lldp-power},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-c9300-cdp-lldp-power},
note = {Source note voice-vlan-lldp-poe-c9300-cdp-lldp-power, checked 2026-09-24}
}