Cisco Router 826 Routers Software Configuration Guide
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2-57 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 Chapter 2 Network Scenarios Voice Scenario Voice Network Figure 2-16 shows a voice network with a Cisco 827-4V router and a Cisco 3640 router as the VoIP gateway using H.323 signaling (H.323 gateway). Figure 2-16 Voice Network The Cisco 3640 router is set up on the LAN as a gatekeeper, which provides address translation and control access for the LAN for H.323 terminals and gateways. The gatekeeper may provide other services to the H.323 terminals and gateways, such as managing bandwidth and locating gateways. In this scenario, the dial endpoint is the Cisco 3640 router, with an IP address of 172.17.1.36 and a subnet mask of 255.255.255.0. This configuration assumes a single-zone setup so that both the Cisco 827-4V and the 3640 router are in the same zone. Dialed numbers are stored by the VoIP session application in the Cisco 827-4V router, in this case H.323. After enough digits are accumulated to match a configured destination pattern, the telephone number is mapped to a dial peer and session target. In this configuration, the dial peer has a session target of RAS, which is a protocol run between the H.323 session protocol gateway and gatekeeper. The gatekeeper resolves the destination for each dialed number, and the call signal routes to the Cisco 3640 gateway, which assigns the call to a voice port. The coder-decoder compression schemes (codecs) are enabled for both ends of the connection and QoS parameters are configured for IP precedence.1Cisco 827-4V router serving as a voice gateway4Ethernet 1 connection at address 172.17.1.1, subnet 255.255.255.0 2Cisco 3640 router serving as a voice gateway5Cisco 3640 router serving as voice gatekeeper 3Ethernet 0 connection at address 172.17.1.36, subnet 255.255.255.0 74584 DSLAMAT MCisco 6400 Cisco 6400 PVC 0/14 10.10.10.36 255.255.255.0 Cisco 3640 Cisco 3640 1 23 4 5
2-58 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 Chapter 2 Network Scenarios Voice Scenario Configuration Tasks To configure the voice scenario, you must configure the data network and then the voice network. Configure the data network: –Configuring the class map, route map, and policy map –Configuring the Ethernet interface –Configuring the ATM interface –Configuring Enhanced IGRP Configure the voice network: –Configuring the POTS dial peers –Configuring VoIP dial peers for H.323 signaling Configuration Examples Use the tables shown here to configure this scenario. Each command includes the values in the data and voice configuration examples shown at the end of this section. 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 “Cisco 3640 Gateway Configuration Example” at the end of this chapter. 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 Purpose Step 1access-lists 101 permit ip any any precedence 5Configures the access list. Step 2class-map voiceConfigures the class map. Step 3match access-group 101Assigns access list 101 to the class map. Step 4route-map data permit 10Configures the route map. Step 5ip precedence routineSets the IP precedence. Step 6policy-map mypolicyConfigures a policy map. Step 7class voiceSpecifies the class for queuing voice traffic. Step 8priority 176Specifies the bandwidth for queuing.1 1. Total bandwidth for the policy map may not exceed 75 percent of the total PVC bandwidth. Step 9class class-defaultConfigures the default class for all traffic but voice traffic.
2-59 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 Chapter 2 Network Scenarios Voice Scenario Configuring the Ethernet Interface Follow the steps here to configure the Ethernet interface, beginning in global configuration mode. Configuring the ATM Interface Follow the steps here to configure the ATM interface, beginning in global configuration mode.Command Purpose Step 1interface ethernet 0Enters configuration mode for the Ethernet interface. Step 2ip address 20.20.20.20 255.255.255.0Sets the IP address and subnet mask for the Ethernet interface. Step 3ip policy route-map data Configures the IP policy route map. Step 4ip route-cache policy Enables fast-switching policy routing. Step 5no shutdownEnables the Ethernet interface. Step 6exitExits configuration mode for the Ethernet interface. Command Purpose Step 1interface ATM 0Enters configuration mode for the ATM interface. Step 2ip address 10.10.10.20 255.255.255.0Sets the IP address and subnet mask for the ATM interface. Step 3pvc 8/35Creates an ATM PVC for each end node with which the router communicates. Step 4encapsulation aal5snapSpecifies the encapsulation type for the PVC. Step 5protocol ip 10.10.10.36 broadcastSpecifies the protocol broadcast for the IP address. Step 6service-policy output mypolicySpecifies the service policy for the ATM interface. Step 7vbr-nrt 640 640 1Specifies the ATM service class. Step 8no shutdownEnables the ATM interface. Step 9exitExits configuration mode for the ATM interface.
2-60 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 Chapter 2 Network Scenarios Voice Scenario Configuring Enhanced IGRP Follow the steps here to configure Enhanced IGRP, beginning in global configuration mode. Configuring the POTS Dial Peers Follow the steps here to configure each POTS dial peer, beginning in global configuration mode. Configuring VoIP Dial Peers for H.323 Signaling Follow the steps here 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 Purpose Step 1router eigrp 100Enters router configuration mode, and enables Enhanced IGRP on the router. The autonomous-system number identifies the route to other Enhanced IGRP routers and is used to tag the Enhanced IGRP information. Step 2network numberSpecifies the network number for each directly connected network. Step 3exitExits router configuration mode. Command Purpose Step 1dial-peer voice number POTSEnters configuration mode for the dial peer Step 2destination-pattern stringDefines the destination telephone number associated with the VoIP dial peer. Step 3port numberSpecifies the port number. Command Purpose Step 1dial-peer voice number Vo I PEnters configuration mode for the dial peer. Step 2destination-pattern stringDefines the destination telephone number associated with each VoIP dial peer. Step 3codec g711ulaw Specifies a codec if you are not using the default codec of g.729. Step 4ip precedence 5Sets the IP precedence. Step 5session target ras Specifies a destination IP address for each dial peer.
2-61 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 Chapter 2 Network Scenarios Voice Scenario 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 file 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 network 10.0.0.0 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 ! !
2-62 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 Chapter 2 Network Scenarios Voice Scenario 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 ! 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 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 !
2-63 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 Chapter 2 Network Scenarios Voice Scenario 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 destination-pattern 12125253333 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
2-64 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 Chapter 2 Network Scenarios Voice Scenario 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 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 transport input none line aux 0 line vty 0 4 password lab login ! end
CHAPTER 3-1 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 3 Basic Router Configuration This chapter includes basic feature-by-feature configuration procedures. This chapter is useful if you have a network in place and you want to add specific basic features. NoteEvery feature described is not necessarily supported on every router model. Where possible and applicable, these feature limitations will be listed. If you prefer to use network scenarios to build a network, see Chapter 2, “Network Scenarios.” For advanced router configuration topics and feature descriptions, see Chapter 4, “Advanced Router Configuration.” This chapter contains the following sections: Before You Configure Your Network, page 3-2 Configuring Basic Parameters, page 3-2 Configuring Bridging, page 3-9 Configuring Static Routing, page 3-12 Configuring Dynamic Routing, page 3-13 Configuring IP Enhanced IGRP, page 3-14 Configuring Addressing Parameters, page 3-15 Configuring DHCP, page 3-19 Configuring TACACS+, page 3-22 Configuring an Extended Access List, page 3-23 Configuring Quality of Service Parameters, page 3-24 Configuring Dial Backup, page 3-34 Configuring IGMP Proxy and Sparse Mode, page 3-39 Configuring IP Security and GRE Tunneling, page 3-41 Configuring IP Precedence, page 3-48 Configuring Voice, page 3-49 Cisco 827 Routers Configuration Examples, page 3-52 Corporate or Endpoint Router Configuration for Data and Voice Network, page 3-56 Each section includes a configuration example and verification steps, where available.
3-2 Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide 78-14565-03 Chapter 3 Basic Router Configuration Before You Configure Your Network Before You Configure Your Network Before you configure your network, you must do the following: Order an ADSL or G.SHDSL line from your telephone service provider. Determine the number of PVCs your service provider is giving you together with their virtual path identifiers (VPIs) and virtual channel identifiers (VCIs). For each PVC determine the type of AAL5 encapsulation supported. It can be one of the following: –AAL5SNAP: This can be either routed RFC 1483 or bridged RFC 1483. In the case of routed RFC 1483, the service provider has to provide you with a static IP address. In the case of bridged RFC 1483, you may use DHCP to obtain your IP address or you may be given a static IP address from your service provider. –AAL5MUX PPP: With this type, you need to determine PPP-related configuration items. If you are setting up an Internet connection, gather the following information: –Point-to-Point Protocol (PPP) client name that is assigned as your login name. –PPP authentication type: Challenge Handshake Authentication Protocol (CHAP) or Password Authentication Protocol (PAP). –PPP password to access your Internet Service Provider (ISP) account. –DNS server IP address and default gateways. If you are setting up a connection to a corporate network, you and its network administrator must generate and share the following information for the WAN interfaces of the routers: –PPP authentication type: CHAP or PAP. –PPP client name to access the router. –PPP password to access the router. If you are setting up IP routing, generate the addressing scheme for your IP network. Configuring Basic Parameters To configure the router, perform the tasks described in the following sections: Configuring Global Parameters Configuring the Ethernet Interface Configuring the Dialer Interface Configuring the Loopback Interface Configuring the Asynchronous Transfer Mode Interface Configuring Command-Line Access to the Router A configuration file example that illustrates how to configure the network is presented after the tasks. After your router boots, the following prompt displays. Enter no. Would you like to enter the initial configuration dialog [yes]: no For complete information on how to access global configuration mode, see the “Entering Global Configuration Mode” section in Appendix A, “Cisco IOS Basic Skills.” For more information on the commands used in the following tables, see the Cisco IOS Release 12.2 documentation set.