Packet Tracer 8.1.1 tutorial - IP telephony advanced configuration

Tutorial description

This tutorial will guide you for advanced voip configuration in Cisco Packet Tracer 8.1.1 network simulation software.  Based on the Cisco's Hierarchical Network Design Model, this simulated network has voip call routing features enabled between two campus buildings with network services (DNS, DHCP ...) centralized in the datacenter.

In a real world environment, the CUCME router would also be located in the datacenter. However, Packet Tracer doesn't seems to support this configuration as IP phones don't register and receive a valid phone number.

Network diagram

Download lab (Packet Tracer >= 6.2)

Configuration tasks

CME-3 configuration

IP configuration

hostname CME-3
!
interface FastEthernet0/0
 ip address 192.168.69.254 255.255.255.0
 duplex auto
 speed auto
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.69.1 
!

Telephony service configuration

telephony-service
 max-ephones 5
 max-dn 5
 ip source-address 192.168.69.254 port 2000
 auto assign 4 to 6
 auto assign 1 to 5

Ephone declaration and number assignment

ephone-dn 1
 number 2001
!
ephone-dn 2
 number 2002
!
ephone 1
 device-security-mode none
 mac-address 0090.0C57.C85E
 type 7960
!
ephone 2
 device-security-mode none
 mac-address 0090.0C20.BA20
 type 7960
!
ephone 3
 device-security-mode none
 mac-address 0005.5E9E.2AC5
 type 7960
 button 1:2
!
ephone 4
 device-security-mode none
 mac-address 0060.5C2D.6220
 type 7960
 button 1:1

CME configuration

IP configuration

hostname CME
!
interface FastEthernet0/1
 ip address 192.168.65.3 255.255.255.0
 duplex auto
 speed auto
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.69.1 
!

Telephony service configuration

 telephony-service
  max-ephones 42
  max-dn 144
  ip source-address 192.168.65.3 port 2000
  auto assign 4 to 6
  auto assign 1 to 5

Ephone declaration and number assignment

ephone-dn 1
 number 1101
!
ephone-dn 2
 number 1102
!
ephone-dn 3
 number 1103
!
ephone-dn 4
 number 1104
!
ephone-dn 5
 number 1105
!
ephone-dn 6
 number 1106
!
ephone 1
 device-security-mode none
 mac-address 0090.0C57.C85E
 type 7960
 button 1:1
!
ephone 2
 device-security-mode none
 mac-address 0090.0C20.BA20
 type 7960
 button 1:2
!
ephone 3
 device-security-mode none
 mac-address 00E0.A340.E430
 type 7960
 button 1:3
!
ephone 4
 device-security-mode none
 mac-address 0060.4710.AE01
 type 7960
 button 1:4
!
ephone 5
 device-security-mode none
 mac-address 000C.8521.0C20
 type 7960
 button 1:5
!
ephone 6
 device-security-mode none
 mac-address 00D0.D31A.7EE9
 type CIPC
 button 1:6

Call routing configuration between CME routers

Dial peers are used to identify call source and destination endpoints and to define the characteristics applied between two CME routers. The destination pattern, configured in a dial peer by using the destination-pattern command, associates a dialed string with a specific telephony device. If the dialed string matches the destination pattern, the call is routed to the remote dial peers. You have to configure a destination pattern for each voice-network dial peer that you define on your network routers.

The destination pattern can be either a complete telephone number or a partial telephone number with wildcard digits, represented by a period (.) character. Each "." represents a wildcard for an individual digit that the originating router expects to match. For example, if the destination pattern for a dial peer is defined as "555....", then any dialed string beginning with 555, plus at least four additional digits, matches this dial peer.

CME-3 dial-peer configuration

dial-peer voice 1 voip
 destination-pattern 1...
 session target ipv4:192.168.65.254
!

CME dial-peer configuration

dial-peer voice 2 voip
 destination-pattern 2...
 session target ipv4:192.168.69.254
!