Cisco VOIP Phone Setup in Packet Tracer

HERE IS AN UPDATED VIDEO SERIES THAT COVERS THIS TUTORIAL

The following tutorial is a result of endless research on how to setup a LAN with two or three IP Phones that can call each other. I compiled this tutorial together for my CCNA 1 students. The actual setup and documentation itself was used for the 2015 IS Open Day room 223 display, modelling a small business office setup. The last part involved a challenge activity for them to create trunk links to ensure calls can be made over the WAN

I used the Packet Tracer instructor version however any version will still support the following documentation.

The following diagram shows that there are four (4) Cisco IP Phones connected; two phones to the Madang network and two phones to the Lae network.

The current configurations for this setup are shown below;

Task 1: We need to configure FastEthernet 0/0 and DHCP server on Madang router

Tasks 1: Configure interface FastEthernet 0/0 and DHCP server on MadR1 (2811 router)

#Configure the FA 0/0 interface#

RouterA>enable

RouterA#configure terminal

RouterA(config)#interface FastEthernet0/0

RouterA(config-if)#ip address 192.168.1.1 255.255.255.0

RouterA(config-if)#no shutdown

The DHCP server is needed to provide an IP address and the TFTP server location for each IP phone connected to the Madang network.

MadR1(config)#ip dhcp pool VOICE #Create DHCP pool named VOICE

MadR1(dhcp-config)#network 192.168.1.0 255.255.255.0 #DHCP network 192.168.1.0 with /24 mask

MadR1(dhcp-config)#default-router 192.168.1.1 #The default router IP address

MadR1(dhcp-config)#option 150 ip 192.168.1.1 #Mandatory for voip configuration.

After the configuration, wait a moment and check that ‘Mad IPPhone’ has received an IP address by placing your cursor over the phone until a configuration summary appears.

Tasks 2: Configure the Call Manager Express telephony service on Madang Router

Tasks 2: Configure the Call Manager Express telephony service on MadR1

You must now configure the Call Manager Express telephony service on MadR1 to enable voip on your network.

MadR1(config)#telephony-service#Configuring the router for telephony services#

MadR1(config-telephony)#max-dn 3 #Define the maximum number of directory numbers#

MadR1(config-telephony)#max-ephones 5 #Define the maximum number of phones#

MadR1(config-telephony)#ip source-address 192.168.1.1 port 2000 #IP Address source#

MadR1(config-telephony)#auto assign 4 to 6 #Automatically assigning ext numbers to buttons#

MadR1(config-telephony)#auto assign 1 to 5 #Automatically assigning ext numbers to buttons#

Task 4: Configure a voice vlan on Madang Distribution Switch and the Madang Access Switch

Apply the following configuration on MadDSw interfaces 1 to 5. This configuration will separate voice and data traffic in different vlans on MadDSw switch. Data packets will be carried on the access vlan.

MadDSw(config)#interface range fa0/1 – 5 #Configure interface range#

MadDSw(config-if-range)#switchport mode access

MadDSw(config-if-range)#switchport voice vlan 1 #Define the VLAN on which voice packets will be handled# 

Task 5: Configure the phone directory for Mad IPPhone

Although ‘MadIP Phone’ is already connected to Madang Access Switch, it needs additionnal configuration before being able to communicate. You need to configure MadR1 CME to assign a phone number to this IP phone.

MadR1(config)#ephone-dn 1 #Defining the first directory entry#

MadR1(config-ephone-dn)#number 422 #Assign the phone number to this entry#

MadR1#config t

Enter configuration commands, one per line. End with CNTL/Z.

MadR1(config)#ephone-dn 1

MadR1(config-ephone-dn)#%LINK-3-UPDOWN: Interface ephone_dsp DN 1.1, changed state to up

MadR1(config-ephone-dn)#number 422

MadR1(config-ephone-dn)#

Task 5: Verify the configuration

Ensure that the IP Phone receives an IP Address and the phone number 422 from MadR1 (this can take a short while).

Task 6: Configure the phone directory for IT testphone

Connect IT testphone to MadDSw and power the phone ON using the power adapter (Physical tab). Login to the Madang Router and do the following configurations.

MadR1(config)#ephone-dn 2#Defining the first directory entry#

MadR1(config-ephone-dn)#number 433 #Assign the phone number to this entry#

Task 7: Verify the configuration

Ensure that the IT testphone receives an IP Address and a the phone number 433 from MadR1  (this can take a short while). 

Dial 422 and check if IP phone 1 correctly receives the call.

Task 8: Repeat the same steps on the Lae network with the other two phones.

Repeating all the above steps for the Cisco IP Phones on the Lae router should connect the two phones together.

The challenge for students

The challenge for the students would be to ensure that the IP Phones on the two networks should be able to call each other.

Since both networks have a vlan for VOICE, to connect the two voice vlans they need to create a TRUNK link between MadR1 voice vlan and LaeR1 voice vlan.

Successfully connecting the two vlans together via a trunk link will result in the phones calling each other from both networks.

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