On Catalyst 9300 switches running IOS XE 17.18.x, voice VLAN is supported only on access ports, not on trunk ports. The 9500X and 9600X models do not support the Voice VLAN feature.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco Catalyst 9300 Series Switches
- Subsystem
- voice VLAN
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.18.x
- Checked
- 2026-10-02
Sources
- VLAN Configuration Guide, Cisco IOS XE 17.18.x (Catalyst 9300 Switches) - Configuring Voice VLANs — Cisco Systems · tier 2 current vendor documentation · Prerequisites for Voice VLANs; Restrictions for Voice VLANs
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting IP phones that do not get a voice VLAN or DHCP options: source note ip-phone-dhcp-vlan-troubleshooting-vvlan-access-ports-only. WarmTransfer. https://warmtransfer.net/knowledge/claims/ip-phone-dhcp-vlan-troubleshooting-vvlan-access-ports-only
BibTeX
@misc{warmtransfer-claim-ip-phone-dhcp-vlan-troubleshooting-vvlan-access-ports-only,
title = {Troubleshooting IP phones that do not get a voice VLAN or DHCP options: source note ip-phone-dhcp-vlan-troubleshooting-vvlan-access-ports-only},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ip-phone-dhcp-vlan-troubleshooting-vvlan-access-ports-only},
note = {Source note ip-phone-dhcp-vlan-troubleshooting-vvlan-access-ports-only, checked 2026-10-02}
}