Voice over IP (VoIP) & CME Lab
Dynamic DHCP Option 150 configuration, Voice VLAN tagging, and CME telephony registrations.
Interactive Topology Map
Live Network View
Scenario & Objectives
Lab Overview
Welcome to the Cisco CME Voice over IP Lab Companion!
In this workspace, you will configure a Router-on-a-Stick topology enabling separate VLAN scopes for voice and data. You will configure TFTP options on the CME Router and register three Cisco 7960 IP Phones.
Topology Interaction: Click on any device in the SVG topology map on the left to see its connection details, configurations checklists, and syntax rules.
Begin by mapping out your subnet scopes in the Subnet Planner tab.
Voice & Data Subnet Planner
Scope Calculations
Assign parameters for your data and voice ranges. Each VLAN is hosted on a /24 subnet block:
| VLAN Segment | Calculated Scope | Subnet Mask | Network ID | Gateway IP | Broadcast ID | Status |
|---|---|---|---|---|---|---|
| VLAN 10: DATA (PCs) | 192.168.10.0/24 | ? | ||||
| VLAN 20: VOICE (Phones) | 192.168.20.0/24 | ? |
Router Gateway Interface Parameters
ROS Configuration validation
CME Router (Subinterface encapsulation)
GigabitEthernet0/0/0.10 (Data subinterface)
Scope: 192.168.10.x
GigabitEthernet0/0/0.20 (Voice subinterface)
Scope: 192.168.20.x
Dynamic IOS CME Config Guide
CCNA Voice Configs
ROUTER Configuration CLI
! Complete validations to see router code
Deployment Analysis
VoIP CME Guided Checklist
Engineering Milestones
Phase 1: Physical Topology Wiring & Power Setup
Pending
Place the Cisco 4331 Router, Catalyst 2960 PoE Switch, three Cisco 7960 IP Phones, and three PC hosts.
Connect Switch port Gi0/1 to Router Gi0/0/0 using copper straight-through. Connect Switch ports Fa0/1, Fa0/2, Fa0/3 to the **Switch Port** of IP Phones 1, 2, and 3.
Power up the IP Phones: Inside Packet Tracer, open the physical view of each phone and plug in the power brick adapters. Connect each PC Fa0 port to the **PC Port** of its respective IP Phone.
Phase 2: Access & Voice VLAN switchports
Pending
Create VLAN 10 (named DATA) and VLAN 20 (named VOICE) in the switch database. Configure Gi0/1 as a trunk interface uplink.
Configure ports Fa0/1 to Fa0/3 as access ports, bind data traffic to access VLAN 10, and map voice packets to voice VLAN 20. Enable Spanning-Tree Portfast.
Phase 3: Router-on-a-Stick Subinterfaces
Pending
Activate the physical interface Gig0/0/0 on the Router using
no shutdown.
Create subinterfaces Gi0/0/0.10 and Gi0/0/0.20 on the router, configuring 802.1Q encapsulation for VLANs 10 and 20 and assigning gateway IPs.
Phase 4: DHCP Server IP Pools & Option 150
Pending
Configure DHCP pool DATA_POOL on the router, assigning network, gateway, and DNS servers. Verify PCs obtain `192.168.10.x` addresses.
Configure DHCP pool VOICE_POOL, adding **option 150 ip 192.168.20.1** to point phones to the CME router TFTP registration.
Phase 5: Unified CME Telephony Services Setup
Pending
Configure telephony services: Enable
telephony-service, specify the source registration address as the voice gateway IP (192.168.20.1:2000), and configure auto-assign.
Define directory numbers: Setup `ephone-dn 1` (extension 101), `ephone-dn 2` (extension 102), and `ephone-dn 3` (extension 103).
Verify phone registration: Confirm the IP Phones dynamically register and show extensions 101, 102, and 103 on their screens.
Phase 6: Voice Calls Verification
Pending
Open GUI phone simulator inside Phone 1 and dial extension `102` (Phone 2). Verify it rings.
Open GUI simulator for Phone 3 and execute calls to extensions `101` and `102` to confirm fully converged operational status.