Source note · Voice VLAN and LLDP-MED and CDP and PoE for IP phones
For Cisco 8800 MPP phones using 802.1X, the PC port and voice VLAN can stay in use only if the switch supports multidomain authentication; otherwise Cisco says to disable the PC port and the voice VLAN.
Checked 2026-09-24
If the switch does not support multiple 802.1X-compliant devices on the same port, you should disable the PC Port when 802.1X authentication is enabled.
- Vendor
- Cisco
- Product
- Cisco IP Phone 8800 Series MPP
- Subsystem
- 802.1X / PC port
- Deployment
- multi-tenant, on-premises
- Region
- not restricted
- Release range
- MPP firmware 11.3(1) and later
- Checked
- 2026-09-24
Sources
- Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later - Cisco IP Phone Security — Cisco Systems · tier 2 current vendor documentation · Cisco IP Phone Security > 802.1X Authentication
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-mpp-dot1x-pc-port. WarmTransfer. https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-mpp-dot1x-pc-port
BibTeX
@misc{warmtransfer-claim-voice-vlan-lldp-poe-mpp-dot1x-pc-port,
title = {Voice VLAN and LLDP-MED and CDP and PoE for IP phones: source note voice-vlan-lldp-poe-mpp-dot1x-pc-port},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/voice-vlan-lldp-poe-mpp-dot1x-pc-port},
note = {Source note voice-vlan-lldp-poe-mpp-dot1x-pc-port, checked 2026-09-24}
}