Source note · Voice VLAN and LLDP-MED and CDP and PoE for IP phones
By default a Catalyst 9300 sends only plain LLDP packets on a port until it receives LLDP-MED packets from the end device.
Checked 2026-09-24
By default, the device only sends LLDP packets until it receives LLDP-MED packets from the end device.
- Vendor
- Cisco
- Product
- Catalyst 9300 Series Switches
- Subsystem
- LLDP-MED
- 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-MED
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-med-after-med-rx. WarmTransfer. https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-c9300-med-after-med-rx
BibTeX
@misc{warmtransfer-claim-voice-vlan-lldp-poe-c9300-med-after-med-rx,
title = {Voice VLAN and LLDP-MED and CDP and PoE for IP phones: source note voice-vlan-lldp-poe-c9300-med-after-med-rx},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-c9300-med-after-med-rx},
note = {Source note voice-vlan-lldp-poe-c9300-med-after-med-rx, checked 2026-09-24}
}