Cisco Systems Router 1800 Series User Manual
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CH A P T E R 1-1 Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide OL-6426-02 1 Basic Router Configuration This chapter provides procedures for configuring the basic parameters of your Cisco router, including global parameter settings, routing protocols, interfaces, and command-line access. It also describes the default configuration on startup. Note that individual router models may not support every feature described throughout this guide. Features not supported by a particular router are indicated whenever possible. This chapter contains the following sections: Interface Port Labels Viewing the Default Configuration Information Needed for Configuration Configuring Basic Parameters Configuring Static Routes Configuring Dynamic Routes Configuring Enhanced IGRP Each section includes a configuration example and verification steps, as available. 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 12.3 documentation set. Interface Port Labels Ta b l e 1 lists the interfaces supported for each router and their associated port labels on the equipment. Ta b l e 1 Supported Interfaces and Associated Port Labels by Cisco Router RouterInterfacePort Label Cisco 1801Fast Ethernet LANs SWITCH and FE8–FE5 (top), FE x and FE4–FE1 (bottom) Fast Ethernet WANsFE0 AT M WA NADSLoPOTS Wireless LANLEFT, RIGHT/PRIMARY BRIISDN S/T
1-2 Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide OL-6426-02 Chapter 1 Basic Router Configuration Viewing the Default Configuration Viewing the Default Configuration When you first boot up your Cisco router, some basic configuration has already been performed. All of the LAN and WAN interfaces have been created, console and VTY ports are configured, and the inside interface for Network Address Translation has been assigned. Use the show running-config command to view the initial configuration, as shown in Example 1. NoteIf you are unable to view the initial configuration and you get a No Password Set error message, you must reset the initial password. For details, see the “Recovering a Lost Password” section in Chapter 14, “Troubleshooting”. Cisco 1802Fast Ethernet LANs SWITCH and FE8–FE5 (top), FE x and FE4–FE1 (bottom) Fast Ethernet WANsFE0 AT M WA NADSLoISDN Wireless LANLEFT, RIGHT/PRIMARY BRIISDN S/T Cisco 1803Fast Ethernet LANs SWITCH and FE8–FE5 (top), FE x and FE4–FE1 (bottom) Fast Ethernet WANsFE0 AT M WA NG.SHDSL Wireless LANLEFT, RIGHT/PRIMARY BRIISDN S/T Cisco 1811Fast Ethernet LANs SWITCH and FE9–FE6 (top), FE x and FE5–FE2 (bottom) Fast Ethernet WANsFE0–FE1 Wireless LANLEFT, RIGHT/PRIMARY USB1–0 V. 9 2 MODEM Cisco 1812Fast Ethernet LANs SWITCH and FE9–FE6 (top), FE x and FE5–FE2 (bottom) Fast Ethernet WANsFE0–FE1 Wireless LANLEFT, RIGHT/PRIMARY BRIISDN S/T USB1–0 Table 1 Supported Interfaces and Associated Port Labels by Cisco Router (continued) Router Interface Port Label
1-3 Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide OL-6426-02 Chapter 1 Basic Router Configuration Viewing the Default Configuration Example 1 Cisco 1812 Default Configuration on Startup version 12.3 service timestamps debug datetime msecservice timestamps log datetime msec no service password-encryption !hostname Router ! boot-start-markerboot-end-marker ! mmi polling-interval 60no mmi auto-configure no mmi pvc mmi snmp-timeout 180no aaa new-model ip subnet-zero !ip cef ! ip ips po max-events 100no ftp-server write-enable ! interface BRI0 no ip address shutdown ! interface FastEthernet0 no ip address shutdown duplex auto speed auto ! interface FastEthernet1 no ip address shutdown duplex auto speed auto ! interface FastEthernet2 no ip address shutdown !interface FastEthernet3 no ip address shutdown! interface FastEthernet4 no ip address shutdown ! interface FastEthernet5 no ip address shutdown !interface FastEthernet6 no ip address shutdown! interface FastEthernet7 no ip address shutdown !
1-4 Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide OL-6426-02 Chapter 1 Basic Router Configuration Information Needed for Configuration interface FastEthernet8 no ip address shutdown !interface FastEthernet9 no ip address shutdown! interface Vlan1 no ip address! ip classless !no ip http server no ip http secure-server !control-plane ! line con 0line aux 0 line vty 0 4 !no scheduler allocate end Information Needed for Configuration You need to gather some or all of the following information, depending on your planned network scenario, prior to configuring your network 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 the 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. –Determine the IP routing parameter information, including IP address, and ATM permanent virtual circuits (PVCs). These PVC parameters are typically virtual path identifier (VPI), virtual circuit identifier (VCI), and traffic shaping parameters. –Determine the number of PVCs that your service provider has given you, along with their VPIs and VCIs. –For each PVC determine the type of AAL5 encapsulation supported. It can be one of the following:
1-5 Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide OL-6426-02 Chapter 1 Basic Router Configuration Configuring Basic Parameters AAL5SNAP—This can be either routed RFC 1483 or bridged RFC 1483. For routed RFC 1483, the service provider must provide you with a static IP address. For bridged RFC 1483, you may use DHCP to obtain your IP address, or you may obtain a static IP address from your service provider. AAL5MUX PPP—With this type of encapsulation, you need to determine the PPP-related configuration items. If you plan to connect over an ADSL or G.SHDSL line: –Order the appropriate line from your public telephone service provider. For ADSL lines—Ensure that the ADSL signaling type is DMT (also called ANSI T1.413) or DMT Issue 2. For G.SHDSL lines—Verify that the G.SHDSL line conforms to the ITU G.991.2 standard and supports Annex A (North America) or Annex B (Europe). Once you have collected the appropriate information, you can perform a full configuration on your router, beginning with the tasks in the “Configuring Basic Parameters” section. Configuring Basic Parameters To configure the router, perform one or more of these tasks: Configure Global Parameters Configure Fast Ethernet LAN Interfaces Configure WAN Interfaces Configuring a Loopback Interface Configuring Command-Line Access to the Router A configuration example is presented with each task to show the network configuration following completion of that task.
1-6 Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide OL-6426-02 Chapter 1 Basic Router Configuration Configuring Basic Parameters Configure Global Parameters Perform these steps to configure select ed global parameters for your router: CommandPurpose Step 1configure terminal Example: Router> enable Router# configure terminal Router(config)# Enters global configuration mode, when using the console port. If you are connecting to the router using a remote terminal, use the following: telnet router name or addressLogin: login id Password: ********* Router> enable Step 2hostname name Example: Router(config)# hostname Router Router(config)# Specifies the name for the router. Step 3enable secret password Example: Router(config)# enable secret cr1ny5hoRouter(config)# Specifies an encrypted password to prevent unauthorized access to the router. Step 4no ip domain-lookup Example: Router(config)# no ip domain-lookup Router(config)# Disables the router from translating unfamiliar words (typos) into IP addresses. For complete information on the global parameter commands, see the Cisco IOS Release 12.3 documentation set. Configure Fast Ethernet LAN Interfaces The Fast Ethernet LAN interfaces on your router are automatically configured as part of the default VLAN and as such, they are not configured with individual addresses. Access is afforded through the VLAN. You may assign the interfaces to other VLANs if desired. For more information about creating VLANs, see Chapter 5, “Configuring a LAN with DHCP and VLANs.”
1-7 Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide OL-6426-02 Chapter 1 Basi c Router Configuration Configuring Basic Parameters Configure WAN Interfaces The Cisco 1811 and Cisco 1812 routers each have two Fast Ethernet interfaces for WAN connection. The Cisco 1801, Cisco 1802, and Cisco 1803 routers each have one ATM interface for WAN connection. Based on the router model you have, configure the WAN interface(s) using one of the following procedures: Configure the Fast Ethernet WAN Interface Configure the ATM WAN Interface Configure the Fast Ethernet WAN Interface This procedure applies only to the Cisco 1811 and Cisco 1812 router models. Perform these steps to configure the Fast Ethernet interfaces, beginning in global configuration mode. CommandPurpose Step 1interface type number Example: Router(config)# interface fastethernet 0 Router(config-int)# Enters the configuration mode for a Fast Ethernet WAN interface on the router. NoteFast Ethernet WAN ports are numbered 0–1 on the Cisco 1800 series routers. Step 2ip address ip-address mask Example: Router(config-int)# ip address 192.1.12.2 255.255.255.0 Router(config-int)# Sets the IP address an d subnet mask for the specified Fast Ethernet interface. Step 3no shutdown Example: Router(config-int)# no shutdown Router(config-int)# Enables the Ethernet interface, changing its state from administratively down to administratively up. Step 4exit Example: Router(config-int)# exitRouter(config)# Exits interface configuration mode and returns to global configuration mode. Repeat these steps for the other Fast Ethernet WAN interface if desired.
1-8 Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide OL-6426-02 Chapter 1 Basic Router Configuration Configuring Basic Parameters Configure the ATM WAN Interface This procedure applies only to the Cisco 1801, Cisco 1802, and Cisco 1803 models. Perform these steps to configure the ATM interface, beginning in global configuration mode: CommandPurpose Step 1For the Cisco 1803 only: controller dsl 0 mode atm exit Example: Router(config)# controller dsl 0 Router(config-controller)# mode atm Router(config-controller)# exitRouter(config)# For routers using the G.SHDSL signaling, perform these commands. Ignore this step for routers using ADSL signaling. Step 2interface type number Example: Router(config)# interface atm0 Router(config-int)# Enters interface configuration mode. Step 3ip address ip-address mask Example: Router(config-int)# ip address 200.200.100.1 255.255.255.0 Router(config-int)# Sets the IP address and subnet mask for the ATM interface. Step 4no shutdown Example: Router(config-int)# no shutdownRouter(config-int)# Enables the ATM 0 interface. Step 5exit Example: Router(config-int)# exit Router(config)# Exits interface configuration mode and returns to global configuration mode.