210-060 · Question #148
A company wants to deploy IP telephony on its network. The engineer has to allow the existing switches to support Cisco IP phones that are connected to a Cisco Unified Communications Manager server…
The correct answer is D. switchport voice vlan 50. The 'switchport voice vlan' command is the correct interface-level command on a Cisco switch to designate a specific VLAN for voice traffic from a Cisco IP phone connected to an access port.
Question
A company wants to deploy IP telephony on its network. The engineer has to allow the existing switches to support Cisco IP phones that are connected to a Cisco Unified Communications Manager server. Which command should be configured on the switches to allow voice traffic on VLAN 50?
Options
- Aswitchport access vlan 50
- Bswitchport mode access
- Cswitchport mode trunk
- Dswitchport voice vlan 50
How the community answered
(29 responses)- A3% (1)
- B3% (1)
- D93% (27)
Why each option
The 'switchport voice vlan' command is the correct interface-level command on a Cisco switch to designate a specific VLAN for voice traffic from a Cisco IP phone connected to an access port.
'switchport access vlan 50' assigns VLAN 50 as the untagged data VLAN for the port, not the auxiliary voice VLAN required for IP phone voice traffic.
'switchport mode access' only sets the interface operational mode to access and does not configure any VLAN assignment for voice traffic.
'switchport mode trunk' configures the port as a trunk link, which is inappropriate for a direct IP phone connection and does not correctly provision a dedicated voice VLAN for the phone.
The 'switchport voice vlan 50' command causes the switch to advertise VLAN 50 to the connected IP phone via CDP, directing the phone to tag its voice frames with VLAN 50 so that voice traffic is logically separated from data traffic on a dedicated voice VLAN.
Concept tested: Configuring voice VLAN on a Cisco access switch port
Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/17-9/configuration_guide/vlan/b_179_vlan_9300_cg/configuring_voice_vlan.html
Topics
Community Discussion
No community discussion yet for this question.