Cisco Router Configuration Guide 1800 Series (Cisco 1801, 1802

Understanding cisco router configuration guide 1800 series (cisco 1801, 1802 is easier when the main points are organized clearly. This guide brings together the essential details and practical considerations.

This article provides procedures to configure the basic parameters of your Cisco router, including Global parameter settings, Routing, Interface protocols, and command line access. It also describes the default configuration at startup. Note that individual router models may not support all the features described in this tutorial. Features that are not supported by a specific router will be highlighted.

• Instructions for configuring Cisco routers
• Instructions for configuring Bullet M2HP Wi-Fi router

How Cisco Router Configuration Guide 1800 Series (Cisco 1801, 1802 Works

Each section will have an example configuration and the exact steps to take, invite you to follow along.

The following table lists the supported Interface for each router and their related ports on the device.

Interface

Cisco 1801

Fast Ethernet LANs

SWITCH and FE8 – FE5 (top), FE x and FE4 – FE1 (bottom)

Fast Ethernet WANs

FE0

ATM WAN

ADSLoPOTS

Wireless LAN

LEFT, RIGHT / PRIMARY

BRI

ISDN S / T

Cisco 1802

Fast Ethernet LANs

SWITCH and FE8 – FE5 (top), FE x and FE4 – FE1 (bottom)

Fast Ethernet WANs

FE0

ATM WAN

ADSLoISDN

Wireless LAN

LEFT, RIGHT / PRIMARY

BRI

ISDN S / T

Cisco 1803

Fast Ethernet LANs

SWITCH and FE8 – FE5 (top), FE x and FE4 – FE1 (bottom)

Fast Ethernet WANs

FE0

ATM WAN

G. SHDSL

Wireless LAN

LEFT, RIGHT / PRIMARY

BRI

ISDN S / T

Cisco 1811

Fast Ethernet LANs

SWITCH and FE9 – FE6 (top), FE x and FE5 – FE2 (bottom)

Fast Ethernet WANs

FE0 – FE1

Wireless LAN

LEFT, RIGHT / PRIMARY

USB

1–0

V.92

MODEM

Cisco 1812

Fast Ethernet LANs

SWITCH and FE9 – FE6 (top), FE x and FE5 – FE2 (bottom)

Fast Ethernet WANs

FE0 – FE1

Wireless LAN

LEFT, RIGHT / PRIMARY

BRI

ISDN S / T

USB

1–0

When you start the Cisco router for the first time, some basic configuration has been done. All LAN and WAN interfaces have been created, the console and VTY ports have been configured, the internal interface for Network Address Translation has been specified. Use the command Show running-config To see the initial configuration, as in the example below:

Note: If you cannot see the original configuration and receive an error message No Password Set, you must reset the original password.

Example: Cisco 1812 default configuration at startup

Version 12.3 Service timestamps debug datetime msec Service timestamps log datetime msec No service password-encryption ! Hostname Router ! Boot-start-marker Boot-end-marker ! Mmi polling-interval 60 No auto-configure mmi No mmi pvc Mmi snmp-timeout 180 No aaa new-model Subnet-zero ip ! Ip cef ! Ip ips po max-events 100 No ftp-server write-enable ! BRI0 interface 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 ! Interface FastEthernet8 No ip address Shutdown ! Interface FastEthernet9 No ip address Shutdown ! Vlan1 interface No ip address ! Classless ip ! No ip http server No ip http secure-server ! Control-plane ! Line con 0 Line aux 0 Line vty 0 4 ! No scheduler allocate End

You will have to collect some or all of the following information, depending on the case.

If you are establishing an Internet connection, you will need the following information:

• The Client Point-to-Point Protocol (PPP) name is assigned as the 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
• IP address of DNS server and default gateway

If you are establishing a connection to the corporate network , you and the network administrator must create and share the following information for the router's WAN interface:

• PPP authentication type: CHAP or PAP
• PPP client name to access router
• PPP password to access the router

If you are setting up IP routing, you need:

• Create an address map for your IP network
• Determine the IP routing parameter information, including: IP address, PVC. PVC parameters are usually virtual identifiers (VPI), virtual circuit identifiers (VCI) and traffic shaping parameters.
• Determine the amount of PVC that service providers provide you, along with their VPI and VCI. Each PVC decides which type of AAL5 is supported, which can be one of the following:
  • AAL5SNAP: This type will have two cases: RFC 1483 routing and RFC 1483 bridge. For RFC 1483 routing, the service provider must provide you with a static IP address. For RFC 1483 bridges, you can use DHCP to get your IP address, or you can get a static IP address from your service provider.
  • AAL5MUX PPP: For this type, you need to identify configuration items related to PPP.

If you plan to connect via ADSL or G. SHDSL:

In this case you need to select the appropriate transmission from the provider.

• For ADSL: Ensure that ADSL signal type is DMT (also called ANSI T1.413) or DMT Issue 2.
• For G. SHDSL: Verify whether the G. SHDSL transmission line complies with ITU G.991.2 standard.

Once you have all the information you need, you can fully configure your Cisco router, starting with the tasks in the basic configuration section.

Follow the steps below to configure the Global parameters for your router:

Order

Purpose

Step 1

Configure terminal

For example:

Router> enable

Router # configure terminal

Router (config) #

Enter Global configuration mode when using the console port.

If you are connecting to the router using a remote terminal, do the following:

Telnet router name or address

Login: login id

Password: *********

Router> enable

Step 2

Hostname Name

For example:

Router (config) # hostname Router

Router (config) #

Name the router.

Step 3

Enable secret Password

For example:

Router (config) # enable secret cr1ny5ho

Router (config) #

Specify an encrypted password to prevent unauthorized access to the router.

Step 4

No domain-lookup ip

For example:

Router (config) # no domain-lookup ip router (config) #

Turn off the auto-decompression feature of incorrect input (typo) to IP address.

The Fast Ethernet LAN Interface on your router is automatically configured as part of the default VLAN and therefore they are not configured with individual addresses. Access is provided through VLAN. You can assign interfaces to other VLANs when needed.

Cisco 1811 and Cisco 1812 routers have two Interface Fast Ethernet for WAN connectivity. Cisco 1801, Cisco 1802 and Cisco 1803 routers have an ATM Interface for WAN connectivity.

Based on the router model you have, configure WAN with one of the following procedures:

WAN configuration Fast Ethernet Interface: This procedure only applies to Cisco 1811 and Cisco 1812 router models. Perform the following steps to configure the Fast Ethernet Interface, starting in Global configuration mode.

Order

Purpose

Step 1

Interface type number

For example:

Enter Interface Fast Ethernet WAN configuration mode on the router.

Note: WAN Fast Ethernet ports are numbered 0-1 on Cisco 1800 series routers.

Step 2

Ip address ip-address mask

For example:

Set the specified IP address and subnet mask for Interface Fast Ethernet.

Step 3

No shutdown

For example:

Turn on Ethernet Interface, change its status from off to enabled (administratively down to administratively up).

Step 4

Exit

For example:

Exit Interface configuration mode and return to Global configuration mode.

Repeat the above steps for other interfaces if you need to.

Configuring Interface WAN ATM: This procedure only applies to Cisco 1801, Cisco 1802 and Cisco 1803 models. Perform the following steps to configure Interface ATM, starting in Global configuration mode:

Order

Purpose

Step 1

For Cisco 1803 only:

Controller dsl 0 Mode atm Exit

For example:

For routers using G. SHDSL signal, execute these commands. If the router uses ADSL signal then skip.

Step 2

InterfaceType number

For example:

Enter Interface configuration mode.

Step 3

Ip addressIp-address mask

For example:

Set IP address and subnet mask for Interface.

Step 4

No shutdown

For example:

Enable Interface ATM 0.

Step 5

Exit

For example:

Exit Interface configuration mode and return to Global configuration mode.

Wireless Interface allows connecting to the router via a wireless LAN connection. For more information about this wireless configuration, you can consult more on cisco. com. I will try to add more later.

The Loopback Interface acts as a placeholder for static IP addresses and provides default routing information. To configure this Interface, follow these steps:

Order

Purpose

Step 1

Interface Type number

For example:

Enter Interface configuration mode.

Step 2

Ip address Ip-address mask

For example:

Set the IP address and subnet mask for Loopback Interface.

Step 3

Exit

For example:

Exit the Loopback Interface configuration mode and return to Global configuration mode.

Configuration example:

Loopback Interface in this model configuration is used to support Network Address Translation (NAT) on virtual model Interface. This example shows that the Loopback Interface is configured on Interface Fast Ethernet with an IP address of 200,200.100.1/24, acting as a static IP. Loopback Interface points to virtual-template1 with a dynamic IP address.

! Interface loopback 0 Ip address 200.200.100.1 255.255.255.0 (static IP address) Ip nat outside ! Interface Virtual-Template1 Unnumbered ip loopback0 No ip directed-broadcast Ip nat outside

Confirm configuration:

To confirm that you have correctly configured the Loopback Interface, enter the show interface command, you will see a confirmation result similar to the example below:

Router # show interface loopback 0 Vòng l?p 0 ???c m?, giao th?c dòng ???c m? Hardware is Loopback Internet address is 200.200.100.1/24 MTU 1514 bytes, BW 8000000 Kbit, DLY 5000 usec, Reliability 255/255, txload 1/255, rxload 1/255 Encapsulation LOOPBACK, loopback not set Last input Never, output never, output hang never Last clearing c?a "show interface" counters never Queuing strategy: fifo Output queue 0/0, 0 drops; input queue 0/75, 0 drops 5 l?n k?t n?i rate 0 bit / sec, 0 packets / sec 5 minute output rate 0 bits / sec, 0 packets / sec 0 packet input, 0 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 packets output, 0 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 output buffer failures, 0 output buffers swapped out

Another way to confirm Loopback Interface is to ping it:

Router # ping 200.200.100.1 Lo?i thoát phân vùng cho abort. Sending 5, 100-byte ICMP Echos to 200.200.100.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min / avg / max = 1/2/4 ms

Follow the steps below to configure the Command-Line Router access:

Order

Purpose

Step 1

Line [Aux |Console |Tty |Vty ]Line-number

For example:

Access the command line configuration mode and specify the command line type. This example specifies the console terminal to access.

Step 2

Password

Password

For example:

Specify a unique password for console terminal.

Step 3

Login

For example:

Turn on password checking when logging in to the terminal.

Step 4

Exec-timeout Minutes [Seconds ]

For example:

Set the time that the EXEC command interpreter waits until the received user information is received. The default is 10 minutes. You can add more seconds when needed.

In this example, the waiting time is 5 minutes 30 seconds. If entering 0 0 means never wait.

Step 5

Line [Aux |Console |Tty |Vty ]Line-number

For example:

Specify a virtual terminal to access the remote console.

Step 6

Password

Password

For example:

Set a password for the virtual terminal.

Step 7

Login

For example:

Turn on password checking when logging into the virtual terminal.

Step 8

End

For example:

Exit the command line configuration mode and return to Privileged EXEC mode.

Configuration example:

The following sample configuration will show command line access commands. You do not need to enter the commands marked "default". These commands appears automatically in the configuration file, created when you use the command Show running-config .

FAQ

What is the main benefit of cisco router configuration guide 1800 series (cisco 1801, 1802?

The main benefit is a clearer understanding of the topic and a practical way to apply the information covered in this guide.

What should I check before using cisco router configuration guide 1800 series (cisco 1801, 1802?

Confirm compatibility, review the required settings, protect important data, and use the latest supported version whenever possible.

What should I do if the result is different?

Repeat the steps carefully, verify permissions and version differences, and consult the product's official support documentation for changes not shown in the article.