Source note · Voice VLAN and LLDP-MED and CDP and PoE for IP phones
The Catalyst 9300 voice VLAN guide warns that enabling IEEE 802.1X on an access port can cost the phone up to 30 seconds of connectivity to the switch.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Catalyst 9300 Series Switches
- Subsystem
- voice VLAN / 802.1X
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.15.x
- Checked
- 2026-09-24
Sources
- VLAN Configuration Guide, Cisco IOS XE 17.15.x (Catalyst 9300 Switches) - Configuring Voice VLANs — Cisco Systems · tier 2 current vendor documentation · Configuring Voice VLANs > Voice VLAN Configuration Guidelines
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-dot1x-30s. WarmTransfer. https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-c9300-dot1x-30s
BibTeX
@misc{warmtransfer-claim-voice-vlan-lldp-poe-c9300-dot1x-30s,
title = {Voice VLAN and LLDP-MED and CDP and PoE for IP phones: source note voice-vlan-lldp-poe-c9300-dot1x-30s},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-c9300-dot1x-30s},
note = {Source note voice-vlan-lldp-poe-c9300-dot1x-30s, checked 2026-09-24}
}