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Voice Scenario
Configure the data network by following the procedures in these sections:
Configuring the Class Map, Route Map, and Policy Map 
Configuring the Ethernet Interface
Configuring the ATM Interface
Configuring Enhanced IGRP
Then, configure the voice network by following the procedures in these sections:
Configuring the POTS Dial Peers
Configuring VoIP Dial Peers for H.323 Signaling 
For configuration examples, see the “Configuring the Class Map, Route Map, and 
Policy Map” section on page 4-83, the “Configuring the Ethernet Interface” 
section on page 4-84, the “Configuring the ATM Interface” section on page 4-84, 
the “Configuring EIGRP” section on page 4-85, the “Configuring the POTS Dial 
Peers” section on page 4-86, and the “Configuring VoIP Dial Peers for H.323 
Signaling” section on page 4-86 provided in the sections below.
Configuration examples are shown for the Cisco 827-4V router and the gateway 
and gatekeeper endpoint routers. 
After configuring your router, you need to configure the PVC endpoint. For a 
general configuration example, see the “Cisco 3640 Gateway Configuration 
Example” section on page 74.
Configuring the Class Map, Route Map, and Policy Map
Follow these steps to configure the class map, route map, and policy map, 
beginning in global configuration mode.
Command Task
Step 1access-lists 101 permit ip any any 
precedence 5Configure the access list.
Step 2class-map voiceConfigure the class map.
Step 3match access-group 101Assign access list 101 to the class map.
Step 4route-map data permit 10Configure the route map.
Step 5ip precedence routineSet the IP precedence. 
						

							 
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Configuring the Ethernet Interface
Follow the steps below to configure the Ethernet interface, beginning in global 
configuration mode.
Configuring the ATM Interface
Complete the following steps to configure the ATM interface, beginning in global 
configuration mode.
Step 6policy-map mypolicyConfigure a policy map.
Step 7class voiceSpecify the class for queuing voice traffic.
Step 8priority 176Specify the bandwidth for queuing.1
Step 9class class-defaultConfigure the default class for all traffic but 
voice traffic.
1. Total bandwidth for the policy map may not exceed 75 percent of the total PVC bandwidth.
Command Task
Command Task
Step 1interface ethernet 0Enter configuration mode for the Ethernet 
interface.
Step 2ip address 20.20.20.20 255.255.255.0Set the IP address and subnet mask for the 
Ethernet interface.
Step 3ip policy route-map data Configure the IP policy route map.
Step 4ip route-cache policy Enable fast-switching policy routing.
Step 5no shutdownEnable the Ethernet interface.
Step 6exitExit configuration mode for the Ethernet 
interface. 
						

							 
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Configuring EIGRP
Follow the steps below to configure EIGRP, beginning in global configuration 
mode. Command Task
Step 1interface ATM 0Enter configuration mode for the ATM 
interface.
Step 2ip address 10.10.10.20 255.255.255.0Set the IP address and subnet mask for the 
ATM interface.
Step 3pvc 8/35Create an ATM PVC for each end node with 
which the router communicates.
Step 4encapsulation aal5snapSpecify the encapsulation type for the PVC.
Step 5protocol ip 10.10.10.36 broadcastSpecify the protocol broadcast for the IP 
address.
Step 6service-policy output mypolicySpecify the service policy for the ATM 
interface.
Step 7vbr-nrt 640 640 1Specify the ATM service class.
Step 8no shutdownEnable the ATM interface.
Step 9exitExit configuration mode for the ATM 
interface.
Command Task
Step 1router eigrp 100Enter router configuration mode, and enable 
EIGRP on the router. The autonomous-system 
number identifies the route to other EIGRP 
routers and is used to tag the EIGRP 
information.
Step 2network numberSpecify the network number for each directly 
connected network.
Step 3exitExit router configuration mode. 
						

							 
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Configuring the POTS Dial Peers
Follow the steps below to configure each POTS dial peer, beginning in global 
configuration mode.
Configuring VoIP Dial Peers for H.323 Signaling
Follow the steps below to configure VoIP dial peers for H.323 signaling in global 
configuration mode.
Configuration Examples
This section contains the following configuration examples:
Cisco 827-4V Router Configuration Example 
Cisco 3640 Gateway Configuration Example
Cisco 3640 Gatekeeper Configuration Example Command Task
Step 1dial-peer voice number POTSEnter configuration mode for the dial peer 
Step 2destination-pattern stringDefine the destination telephone number 
associated with the VoIP dial peer.
Step 3port numberSpecify the port number.
Command Task
Step 1dial-peer voice number Vo I PEnter configuration mode for the dial peer. 
Step 2destination-pattern stringDefine the destination telephone number 
associated with each VoIP dial peer. 
Step 3codec g711ulaw Specify a codec if you are not using the 
default codec of g.729. 
Step 4ip precedence 5Set the IP precedence.
Step 5session target ras Specify a destination IP address for each dial 
peer. 
						

							 
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Cisco 827-4V Router Configuration Example
The following is a configuration example for the Cisco 827-4V router portion of 
the voice network scenario. You do not have to enter the commands marked 
“default.” These commands appear automatically in the configuration file that is 
generated when you use the show running-config command.
!
class-map voice
match access-group 101
!
route-map data permit 10
set ip precedence routine
!
policy-map mypolicy
class voice
priority 176
class class-default
fair-queue 16 (default)
!
ip subnet-zero
!
gateway
!
interface Ethernet0
ip address 20.20.20.20 255.255.255.0
no ip directed-broadcast (default)
ip route-cache policy
ip policy route-map data
!
interface ATM0
ip address 10.10.10.20 255.255.255.0
no ip directed-broadcast (default)
no atm ilmi-keepalive (default)
pvc 1/40
service-policy output mypolicy
protocol ip 10.10.10.36 broadcast
vbr-nrt 640 640 1
! 640 is the maximum upstream rate of ADSL
encapsulation aal5snap
!
bundle-enable
h323-gateway voip interface
h323-gateway voip id gk-twister ipaddr 172.17.1.1 1719
h323-gateway voip h323-id gw-820
h323-gateway voip tech-prefix 1#
!
router eigrp 100 
						

							 
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network 20.0.0.0
!
ip classless (default)
no ip http server
!
access-list 101 permit ip any any precedence critical(5)
!
line con 0
exec-timeout 0 0
transport input none
stopbits 1
line vty 0 4
login
!
!
voice-port 1
local-alerting
!
voice-port 2
local-alerting
!
voice-port 3
local-alerting
!
voice-port 4
local-alerting
!
dial-peer voice 10 voip
destination-pattern .......
ip precedence 5
session target ras
!
dial-peer voice 1 pots
destination-pattern 4085258111
port 1
!
dial-peer voice 2 pots
destination-pattern 14085258222
port 2
!
dial-peer voice 3 pots
destination-pattern 14085258333
port 3
!
dial-peer voice 4 pots
destination-pattern 14085258444
port 4 
						

							 
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!
end
Cisco 3640 Gateway Configuration Example
The following is a configuration example for the Cisco 3640 gateway portion of 
the voice network scenario. You do not have to enter the commands marked 
“default.” These commands appear automatically in the configuration file that is 
generated when you use the show running-config command.
!
class-map voice
match access-group 101
!
policy-map mypolicy
class voice
bandwidth 176
class class-default
fair-queue 16
!
ip subnet-zero
!
cns event-service server
!
voice-port 1/0/0
!
voice-port 1/0/1
!
voice-port 1/1/0
!
voice-port 1/1/1
!
dial-peer voice 10 voip
destination-pattern .......
ip precedence 5
session target ras
!
dial-peer voice 1 pots
destination-pattern 12125253111
port 1/0/0
!
dial-peer voice 2 pots
destination-pattern 12125253222
port 1/0/1
!
dial-peer voice 3 pots 
						

							 
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port 1/1/0
!
dial-peer voice 4 pots
destination-pattern 12125253444
port 1/1/1
!
process-max-time 200
gateway 
!
interface Ethernet0/0
ip address 172.17.1.36 255.255.255.0
no ip directed-broadcast
h323-gateway voip interface
h323-gateway voip id gk-twister ipaddr 172.17.1.1 1719
h323-gateway voip h323-id gw-3640
h323-gateway voip tech-prefix 1#
!
interface ATM2/0
ip address 10.10.10.36 255.255.255.0
no ip directed-broadcast
no atm ilmi-keepalive
pvc 8/35 
service-policy output mypolicy
protocol ip 10.10.10.20 broadcast
vbr-rt 1000 600 1
encapsulation aal5snap
!
router eigrp 100
network 10.0.0.0
network 172.17.0.0
!
no ip classless
no ip http server
!
access-list 101 permit ip any any precedence critical (5)
!
line con 0
exec-timeout 0 0
transport input none
line aux 0
line vty 0 4
login
!
!
end 
						

							 
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Cisco 3640 Gatekeeper Configuration Example
The following is a configuration example for the H.323 gatekeeper portion of the 
voice network scenario. You do not have to enter the commands marked 
“default.” These commands appear automatically in the configuration file that is 
generated when you use the show running-config command.
!
class-map voice
match access-group 101
!
!
policy-map mypolicy
class voice
bandwidth 176
class class-default
fair-queue 16
!
ip subnet-zero
!
ip dvmrp route-limit 20000
!
process-max-time 200
!
interface Ethernet0/0
ip address 172.28.9.83 255.255.255.0
no ip directed-broadcast (default)
!
interface Ethernet0/1
ip address 172.17.1.1 255.255.255.0
no ip directed-broadcast (default)
!
router eigrp 100
network 172.17.0.0
!
ip classless (default)
no ip http server
!
!
gatekeeper
zone local gk-router router.cisco.com 172.17.1.1
zone remote gk-sf1 cisco.com 179.15.2.2
zone remote gk-sf2 lucent.com 180.4.0.1
zone prefix gk-sf1 1415525....
zone prefix gk-sf2 1415527....
!
line con 0
exec-timeout 0 0 
						

							 
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line aux 0
line vty 0 4
password lab
login
!
end