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This chapter describes how to configure the Cisco 1700 router to connect to a central-site router over a a Frame Relay line and provides verification steps and troubleshooting tips.
This chapter contains the following sections:
The configurations in this chapter are based on the following assumptions:
Before you begin configuration, be aware of the following:
This section describes how to configure a basic Frame Relay connection to the central-site router.
These are the major tasks when configuring your router:
Figure 5-1 illustrates the example configuration used in this section.
Use this table to configure the router for some global parameters.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode. | Router# | |||
| Configure the router to show the date and time of all debug messages. This command is optional, but recommended if you use debug commands to troubleshoot your configuration. | Router | |||
| Configure the router to show the date and time of all log messages. This command is optional, but recommended if you use the verification steps described in this guide. This feature is enabled for all the example command output shown in this guide. | Router | |||
| Enable IPX routing and configure the router with an IPX address. | Router | ipx routing 0060.834f.66dd |
Use this table to configure the router with some security measures.
| Step | Task | Router Prompt | Command | ||
| Configure the router with a host name, which is used in prompts and default configuration file names. For PPP authentication, the host name entered with this command must match the username of the central-site router. | Router | hostname 1700 | ||
| Specify a password to prevent unauthorized access to the router. | | enable password <1700user> |
Use this table to configure the Fast Ethernet interface, which connects your router to the local network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the Fast Ethernet interface. | | |||
| Configure this interface with an IP address and a subnet mask. | | ip address 172.16.25.1 255.255.255.0 | ||
| Enable IPX routing on this interface. | | ipx network ABC | ||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for this interface. | |
Use this table to configure the serial interface for Frame Relay packet encapsulation.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the serial interface. | | |||
| Set the encapsulation method on this interface to Frame Relay. | | |||
| Enable the configuration changes on this interface. | 1700(config-if)# |
You can verify your configuration to this point by confirming a permanent virtual circuit (PVC) is active on the Frame Relay line, as follows:
Step 1 Wait 60 seconds after entering the encapsulation frame-relay command.
Step 2 From privileged EXEC command mode, enter the show frame-relay pvc command.
Step 3 Confirm that the "PVC STATUS=ACTIVE" message (shown in bold in the example) appears in the command output:
Step 4 Record the number shown in the "DLCI=" message. (In this example, the number is "17.") You use this number to finish configuring the Frame Relay interface.
Step 5 If there is no output after entering the command, use the show interface serial0 command to determine whether or not the serial interface is active. An example of this command is in the next section, "Configuring the Point-to-Point Frame Relay Connection." The first line of the command output should be this:
If the first line of the command output is "Serial0 is up, line protocol is down," you should confirm that the Local Management Interface (LMI) type for the Frame Relay switch is correct by checking for the "LMI type is CISCO" message in the same command output.
Step 6 To continue configuration, re-enter global configuration mode.
Use this table to configure the Frame Relay interface, which connects your router to the central-site router over the wide-area network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the serial subinterface and specify this interface as a point-to-point connection. | | |||
| Configure this interface with an IP address and a subnet mask. | | ip address 192.168.39.40 255.255.255.0 | ||
| Enable IPX routing on this interface. | | ipx network 987 | ||
| Assign a data link connection identifier (DLCI) to the Frame Relay subinterface. If you are unsure of the DLCI, use the number that you recorded in Step 4 of the previous "Verifying Your Configuration" section. | | |||
| Enable snapshot routing. Because your router is dialing into a central-site router, it is considered the client router. The first number is the amount of "active time" (in minutes) during which routing updates are exchanged between your router and the central-site router. The second number is the amount of "quiet time" (in minutes) during which routing entries are frozen and remain unchanged. | | snapshot client 5 60 | ||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for this interface. | |
You can verify your configuration to this point by
Step 1 From the privileged EXEC command mode, enter the show interface serial 0 command, as follows:
Step 2 Confirm that the following messages (shown in bold) appear in the command output:
Step 3 If the message does not appear in the command output, take the following steps:
(a) Confirm with the Frame Relay service provider that the LMI setting is correct for your line.
(b) Confirm that keepalives are set and that the router is receiving LMI updates.
Step 4 To continue configuration, re-enter global configuration mode.
Step 1 From the privileged EXEC command mode, enter the show frame-relay map command.
Step 2 Confirm that the "status defined, active" message (shown in bold in the example) appears for each serial subinterface.
Step 3 If the message does not appear, confirm that
(a) The central-site router is connected and configured.
(b) Check with the Frame Relay carrier to verify that the line is operating correctly.
Step 4 To continue configuration, re-enter global configuration mode.
Step 1 From the privileged EXEC command mode, enter the ping command followed by the IP address of the central-site router.
Step 2 Note the percentage in the "Success rate..." line (shown in bold in the example):
If the success rate is 60 percent or greater, this verification step is successful.
Step 3 To continue configuration, re-enter global configuration mode.
Use this table to configure the Frame Relay interface for Enhanced Interior Gateway Routing Protocol (EIGRP) routing.
| Step | Task | Router Prompt | Command | ||
| Configure the IP EIGRP routing process. | | router eigrp 202 | ||
| Specify a list of networks for the EIGRP routing process by entering the IP address of the directly connected network. | | network 172.16.0.0 | ||
| Configure the router to forward packets addressed to a subnet of a network with no network default route. | | |||
| Exit router configuration mode. | |
Use this table to configure some parameters that control access to the router.
| Step | Task | Router Prompt | Command | ||
|---|---|---|---|---|---|
| Specify the console terminal line. | | |||
| Set the interval in minutes that the EXEC command interpreter waits until user input is detected. | | |||
| Specify a virtual terminal for remote console access. | | line vty 0 4 | ||
| Specify a password on the line. | | password <lineaccess> | ||
| Enable password checking at terminal session login. | | |||
| Exit configuration mode. | |
This section describes how to configure the Cisco 1700 router with an internal data service unit/channel service unit (DSU/CSU) for Frame Relay. In addition to the assumptions described in the "Before You Begin" section of this chapter, this configuration assumes that the internal DSU/CSU is a switched 56-kbps interface.
These are the major tasks when configuring your router:
Figure 5-2 illustrates the example configuration used in this section.
Use this table to configure the router for some global parameters.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode. | Router# | |||
| Configure the router to show the date and time of all debug messages. This command is optional, but recommended if you use debug commands to troubleshoot your configuration. | Router | |||
| Configure the router to show the date and time of all log messages. This command is optional, but recommended if you use the verification steps described in this guide. This feature is enabled for all the example command output shown in this guide. | Router | |||
| Enable IPX routing and configure the router with an IPX address. | Router | ipx routing 0060.834f.66dd |
Use this table to configure the router with some security measures.
| Step | Task | Router Prompt | Command | ||
| Configure the router with a host name, which is used in prompts and default configuration file names. For PPP authentication, the host name entered with this command must match the username of the central-site router. | Router | hostname 1700 | ||
| Specify a password to prevent unauthorized access to the router. | | enable password <1700user> |
Use this table to configure the Fast Ethernet interface, which connects your router to the local network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the Fast Ethernet interface. | | |||
| Configure this interface with an IP address and a subnet mask. | | ip address 172.16.25.1 255.255.255.224 | ||
| Enable IPX routing on this interface. | | ipx network ABC | ||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for this interface. | |
Use this table to configure the serial interface, which connects your router to the central-site router over the wide-area network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the serial interface. | | |||
| Disable IP routing on this interface. | | |||
| Set the encapsulation method on this interface to Frame Relay. | | |||
| Configure the clock source for the 56-kbps DSU/CSU module. In most applications, the DSU/CSU should be configured with the clock source line command. For back-to-back DSU/CSU configurations, configure one DSU/CSU with the clock source internal command and the other with the clock source line command. | | |||
| Configure this interface to transmit packets in switched dial-up mode or digital data service mode using the 56-kbps DSU/CSU module. If the clock rate has not been set correctly with the service-module 56k clock source line command, this command is not accepted by the router. | |
You can verify your configuration to this point by
Step 1 From the privileged EXEC command mode, enter the show interface serial 0 command.
Step 2 Confirm that the "Serial0 is up, line protocol is up" message (shown in bold in the example) appears in the command output.
Step 3 To continue configuration, re-enter global configuration mode.
Step 1 From the privileged EXEC command mode, enter the show service module serial 0 command:
Step 2 Confirm that the "loss of signal" message (shown in bold in the example) shows zero, which means that there are no problems with the interface receiving a line signal.
Step 3 To continue configuration, re-enter global configuration mode.
Use this table to configure the Frame Relay subinterface network addresses.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the serial subinterface and specify this interface as a point-to-point connection. | | |||
| Configure this interface with an IP address and a subnet mask. | | ip address 172.16.26.1 255.255.255.0 | ||
| Enable IPX routing on this interface. | | ipx network 987 | ||
| Assign a DLCI to the Frame Relay subinterface. | | |||
| Configure this interface with an IP address and a subnet mask. | | ip address 192.168.38.41 255.255.255.0 | ||
| Enable IPX routing on this interface. | | ipx network 456 | ||
| Enable snapshot routing. Because your router is dialing into a central-site router, it is considered the client router. The first number is the amount of "active time" (in minutes) during which routing updates are exchanged between your router and the central-site router. The second number is the amount of "quiet time" (in minutes) during which routing entries are frozen and remain unchanged. | | snapshot client 5 60 | ||
| Assign a DLCI to the Frame Relay subinterface. | | frame-relay interface-dlci 17 | ||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for the serial interface. | |
Use this table to configure the Frame Relay interface for Enhanced Interior Gateway Routing Protocol (EIGRP) routing.
| Step | Task | Router Prompt | Command | ||
| Configure the IP EIGRP routing process. | | router eigrp 202 | ||
| Specify a list of networks for the EIGRP routing process by entering the IP address of the directly connected network. | | network 172.16.0.0 | ||
| Configure the router to forward packets addressed to a subnet of a network with no network default route. | | |||
| Exit router configuration mode. | 1700(config-router)# | exit |
Use this table to configure some parameters that control access to the router.
| Step | Task | Router Prompt | Command | ||
|---|---|---|---|---|---|
| Specify the console terminal line. | | |||
| Set the interval in minutes that the EXEC command interpreter waits until user input is detected. | | |||
| Specify a virtual terminal for remote console access. | | line vty 0 4 | ||
| Specify a password on the line. | | password <lineaccess> | ||
| Enable password checking at terminal session login. | | |||
| Exit configuration mode. | |
In addition to the assumptions listed in the "Before You Begin" section of this chapter, the configuration is based on the following assumptions:
These are the major tasks when configuring your router:
Figure 5-3 illustrates the example configuration that is used in this section.
Use this table to configure the router for some global parameters.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode. | Router# | |||
| Configure the router to show the date and time of all debug messages. This command is optional, but recommended if you use debug commands to troubleshoot your configuration. | Router | |||
| Configure the router to show the date and time of all log messages. This command is optional, but recommended if you use the verification steps described in this guide. This feature is enabled for all the example command output shown in this guide. | Router | |||
| Configure the router with its IPX address. | Router | ipx routing 0060.834f.66dd | ||
| Configure the type of central office switch being used on the ISDN interface. Use the keyword that matches the ISDN switch type that you are using:
| Router | isdn switch-type basic-ni |
Use this table to configure the router with some security measures.
| Step | Task | Router Prompt | Command | ||
| Configure the router with a host name, which is used in prompts and default configuration file names. For PPP authentication, the host name entered with this command must match the username of the central-site router. | Router | hostname 1700 | ||
| Specify a password to prevent unauthorized access to the router. | | enable password <1700user> | ||
| Specify the password used during caller identification and CHAP and PAP authentication. For CHAP and PAP authentication, the username entered with this command must match the host name of the central-site router. | | username HQ password <guessme> |
Use this table to configure the Fast Ethernet interface, which connects your router to the local network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the Fast Ethernet interface. | | |||
| Configure this interface with an IP address and a subnet mask. | | ip address 172.16.25.1 255.255.255.0 | ||
| Configure the Fast Ethernet interface IPX network number. | 1700(config-if)# | ipx network ABC | ||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for the this interface. | |
Use this table to configure the Frame Relay interface, which connects your router to the central-site router over the wide-area network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the serial interface. | | |||
| Set the encapsulation method on this interface to Frame Relay. | 1700(config-if)# | |||
| Enter configuration mode for the serial subinterface and specify this interface as a point-to-point connection. | | |||
| Configure the BRI interface to act as a backup line for this interface. | | |||
| Define when the ISDN line is used as a backup for this interface:
| 1700(config-if)# | backup delay 10 10 | ||
| Configure this interface with an IP address. | | ip address 172.16.26.1 255.255.255.0 | ||
| Enable IPX routing on this interface. | | ipx network 9876 | ||
| Assign a data link connection identifier (DLCI) to the Frame Relay subinterface. | | |||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for this interface. | |
Use this table to configure the ISDN line to act as a backup connection if for some reason the Frame Relay connection fails.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the ISDN interface. | | |||
| Enter the service profile identifier (SPID) number assigned by the ISDN service provider to the B1 channel. This step is required only when the service provider has assigned a SPID to your ISDN line. Not all ISDN lines have SPIDs. | | isdn spid1 555987601 | ||
| Define the SPID number assigned by the ISDN service provider to the B2 channel. This step is required only when the service provider has assigned a SPID to your ISDN line. Not all ISDN lines have SPIDs. | | isdn spid2 555987602 | ||
| Enable IP routing on this interface without assigning an IP address. | | |||
| Define the IPX network number for this interface. | 1700(config-if)# | |||
| Set the encapsulation method on this interface to PPP. | | |||
| Specify the telephone number that this interface dials to connect to the central-site router. This command is used when the interface is only connecting to a single remote site. | | dialer string 5552053 | ||
| Assign this interface to a dialer group. | | |||
| Enable CHAP and PAP authentication on this interface. CHAP authentication is attempted first. If the central-site router does not support CHAP, PAP is used for authentication. | | |||
| Enable multilink PPP on this interface. | | |||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for this interface. | |
You can verify your configuration by confirming connectivity to the central-site router as follows:
Step 1 From the privileged EXEC command mode, enter the ping command followed by the IP address of the central-site route to have the router dial the remote router.
Step 2 Wait for the "ISDN-6-CONNECT" message (shown in bold in the example):
Step 3 Enter the ping command followed by the IP address of the central-site router a second time:
Step 4 If the success rate (shown in bold in the example) is 100 percent, this verification step is successful.
Step 5 If the success rate is less than 60 percent, take the following steps:
Step 6 To continue configuration, re-enter global configuration mode.
Use this table to configure how and when the ISDN line connects to the central-site router.
| Step | Task | Router Prompt | Command | ||
| Configure the IP Enhanced Interior Gateway Routing Protocol (EIGRP) routing process. | | router eigrp 202 | ||
| Specify a list of networks for the EIGRP routing process by entering the IP address of the directly connected network. | | network 172.16.0.0 | ||
| Specify that the router does not forward packets that are destined for a subnet of a network that has no network default route. | | |||
| | dialer-list 1 protocol ip permit | |||
| Specify an access list by list number and protocol (IPX) to define the "interesting" packets that can trigger a called to the destination. | | dialer-list 1 protocol ipx permit | ||
| Exit router configuration mode. | |
Use this table to configure some parameters that control access to the router.
| Step | Task | Router Prompt | Command | ||
|---|---|---|---|---|---|
| Specify the console terminal line. | | |||
| Set the interval that the EXEC command interpreter waits until user input is detected. | | |||
| Specify a virtual terminal for remote console access. | | line vty 0 4 | ||
| Specify a password on the line. | | password <lineaccess> | ||
| Enable password checking at terminal session login. | | |||
| Exit configuration mode. | |
You can verify your router configuration to this point by confirming that the ISDN connects dynamically to the remote site when the Frame Relay connection is disconnected by taking the following steps:
| Step | Task | ||
|---|---|---|---|
| Remove the cable that connects the router to the Frame Relay services, or otherwise force the DLCI(s) to become inactive, which brings the line protocol down. | ||
| When the router generates routing updates, the ISDN line should begin dialing. If the ISDN line does not dial, use the ping command as described in the "Configuring the ISDN Interface" section. | ||
| Reconnect the cable that connects the router to the Frame Relay services, or force the DLCI(s) to become active. The ISDN line should disconnect dynamically. |
If you are having problems, take some or all of the following steps:
1. Confirm that you used the broadcast keyword in the dialer map command. This keyword causes dialing to occur with a flash routing update. If you do not use the broadcast keyword, routing updates do not trigger dialing on the ISDN line.
2. If you want to use the ISDN line even when the Frame Relay line is connected, use dialer profiles. Otherwise, the ISDN line operates in backup mode only.
3. If you are having problems, you can use some or all of the following debug commands:
 | Caution If you are not familiar with Cisco IOS debug commands, you should read the "Using Debug Commands" section in the "Cisco IOS Basic Skills" chapter before attempting any debugging. |
This section describes how to configure ISDN to operate as a secondary, or backup, WAN connection by using dialer profiles to connect to multiple central-site routers.
In addition to the assumptions listed in the "Before You Begin" section at the beginning of this chapter, this configuration is based on the following additional assumptions:
These are the major tasks when configuring your router:
Use this table to configure the router for some global parameters.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode. | Router# | |||
| Configure the router to show the date and time of all debug messages. This command is optional, but recommended if you use debug commands to troubleshoot your configuration. | | |||
| Configure the router to show the date and time of all log messages. This command is optional, but recommended if you use the verification steps described in this guide. This feature is enabled for all the example command output shown in this guide. | | |||
| Configure the type of central office switch being used on the ISDN interface. Use the keyword that matches the ISDN switch type that you are using:
| |
Use this table to configure the router with some security measures.
| Step | Task | Router Prompt | Command | ||
| Configure the router with a host name, which is used in prompts and default configuration file names. For PPP authentication, the host name entered with this command must match the username of the central-site router. | | hostname 1700 | ||
| Specify a password to prevent unauthorized access to the router. | | enable password <1700user> | ||
| Specify the password used during caller identification and CHAP and PAP authentication. This password applies only to one of the central-site routers. For security reasons, a different password should be used for each remote location that the router dials on the backup ISDN line. For PPP authentication, the username entered with this command must match the host name of the central-site router. | | username HQ1 password <guessme1> | ||
| Specify the password used during caller identification and CHAP and PAP authentication. This password applies only to one of the central-site routers. For security reasons, a different password should be used for each remote location that the router dials on the backup ISDN line. For PPP authentication, the username entered with this command must match the host name of the central-site router. | | username HQ2 password <guessme2> |
Use this table to configure the Fast Ethernet interface, which connects your router to the local network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for this interface. | | |||
| Configure this interface with an Ethernet address. | | ip address 172.16.20.1 255.255.255.0 | ||
| Disable fast switching and autonomous switching on this interface. | | |||
| Enable IP multicast fast switching on this interface. | 1700(config-if)# | |||
| Enable the configuration changes for this interface. | | |||
| Exit configuration mode for this interface. | |
Use this table to configure the serial interface, which connects your router to the central-site router over the wide-area network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for this interface. | | |||
| Disable IP processing for this interface. | | |||
| Configure this interface for Frame Relay encapsulation. | | |||
| Enable the configuration changes for this interface. | | |||
| Exit configuration mode for this interface. | |
Use this table to configure a Frame Relay connection to a central-site router.
| Step | Task | Router Prompt | Command | ||
| Create a subinterface and enter configuration mode for the interface. | | |||
| Define when the ISDN line is used as a backup for this interface:
| 1700(config-if)# | backup delay 10 10 | ||
| Configure the BRI interface to act as a dial backup line for this subinterface. | | |||
| Configure this subinterface with an IP address. | | |||
| Configure this subinterface with an IPX network address. | | |||
| Assign a data link connection identifier (DLCI) to this subinterface. | | |||
| Enable the configuration changes for this subinterface. | | |||
| Exit configuration mode for this subinterface. | |
Use this table to configure a Frame Relay connection to a second central-site router.
| Step | Task | Router Prompt | Command | ||
| Create a subinterface and enter configuration mode for the interface. | | |||
| Define when the ISDN line is used as a backup for this interface:
| 1700(config-if)# | backup delay 10 10 | ||
| Configure the BRI interface to act as a dial backup line for this subinterface. | | |||
| Configure this subinterface with an IP address. | | |||
| Configure this subinterface with an IPX network address. | | |||
| Assign a data link connection identifier (DLCI) to this subinterface. | | |||
| Enable the configuration changes for this subinterface. | | |||
| Exit configuration mode for this subinterface. | |
Use this table to configure the ISDN interface, which connects your router to the central-site router if for some reason the Frame Relay interface fails.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for this interface. | | |||
| Configure this interface for PPP packet encapsulation. | | |||
| Assign this interface to a dialer pool. | | |||
| Enable the configuration changes on this interface. | | |||
| Exit configuration mode for this interface. | |
Use this table to configure the ISDN backup connection to one central-site router.
| Step | Task | Router Prompt | Command | ||
| Create an ISDN dialer interface, and enter configuration mode for the interface. The number that you assign in this command must match the number you assigned with the backup interface command when you configured the primary connection to the first central-site router. | | |||
| Enable IP routing without assigning an IP address. | 1700(config-if)# | |||
| Configure this interface for PPP packet encapsulation. | | |||
| Configure this interface with an IPX network number. | | |||
| Configure the name of the central-site router that this interface dials. The name that you enter with this command should be the same name that you entered with the username password command in the "Configuring Security" section. | | |||
| Configure the number that the interface dials to connect to the central-site router. | | |||
| Specify that the router can have only one call connected to the first central-site router at any one time. | | |||
| Assign this interface to a dialer pool. | | |||
| Assign this interface to a dialer group. | | |||
| Enable CHAP and PAP authentication on this interface. CHAP authentication is attempted first. If the central-site router does not support CHAP, PAP is used for authentication. | | |||
| Enable the configuration changes for this interface. | | |||
| Exit configuration mode for this subinterface. | |
Use this table to configure the ISDN backup connection to a second central-site router.
| Step | Task | Router Prompt | Command | ||
| Create an ISDN dialer interface, and enter configuration mode for the interface. The number that you assign in this command must match the number you assigned with the backup interface command when you configured the primary connection to the second central-site router. | | |||
| Enable IP routing without assigning an IP address. | 1700(config-if)# | |||
| Configure this interface for PPP packet encapsulation. | | |||
| Configure this interface with an IPX network number. | | |||
| Configure the name of the central-site router that this interface dials. The name that you enter with this command should be the same name that you entered with the username password command in the "Configuring Security" section. | | |||
| Configure the number that the interface dials to connect to the central-site router. | | |||
| Specify that the router can have only one call connected to the first central-site router at any one time. | | |||
| Assign this interface to a dialer pool. |
| |||
| Assign this interface to a dialer group. | | |||
| Enable CHAP and PAP authentication on this interface. CHAP authentication is attempted first. If the central-site router does not support CHAP, PAP is used for authentication. | | |||
| Enable the configuration changes for this interface. | | |||
| Exit configuration mode for this subinterface. |
Use this table to configure the router for Enhanced Interior Gateway Routing Protocol (EIGRP) routing.
| Step | Task | Router Prompt | Command | ||
| Configure the router for IP EIGRP routing. | | |||
| Configure the IP network address for EIGRP routing. | 1700(config-router)# | |||
| Exit router configuration mode. | 1700(config-router)# |
Use this table to configure some parameters that control access to the router.
| Step | Task | Router Prompt | Command | ||
|---|---|---|---|---|---|
| Specify the console terminal line. | | |||
| Set the interval in minutes that the EXEC command interpreter waits until user input is detected. | | |||
| Specify a virtual terminal for remote console access. | | line vty 0 4 | ||
| Specify a password on the line. | | password <lineaccess> | ||
| Enable password checking at terminal session login. | | |||
| Exit configuration mode. | |
These are the major tasks when configuring your router:
When the router makes routing decisions, static routes normally take precedence over learned routes. If you have configured static routes, the router usually sends data over these routes before using routes that it has learned and stored in the routing table.
However, when the ISDN line is used as a backup connection and is configured with static routes, the primary WAN connection (the Frame Relay line) does not come back up once the ISDN line is used. Floating static routes enable the ISDN line to use static routes to the central-site router until the main WAN connection, the Frame Relay line, is active again.
Figure 5-4 illustrates the example configuration that is used in this section.
In addition to the assumptions listed in the "Before You Begin" section of this chapter, the configuration in this section is based on the following assumptions:
Use this table to configure the router for some global parameters.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode. | 1700# | |||
| Configure the router to show the date and time of all debug messages. This command is optional, but recommended if you use debug commands to troubleshoot your configuration. | | |||
| Configure the router to show the date and time of all log messages. This command is optional, but recommended if you use the verification steps described in this guide. This feature is enabled for all the example command output shown in this guide. | | |||
| Configure the type of central office switch being used on the ISDN interface. Use the keyword that matches the ISDN switch type that you are using:
| | isdn switch-type basic-ni |
Use this table to configure the router with some security measures.
| Step | Task | Router Prompt | Command | ||
| Configure the router with a host name, which is used in prompts and default configuration file names. For PPP authentication, the host name entered with this command must match the username of the central-site router. | | hostname 1700 | ||
| Specify a password to prevent unauthorized access to the router. | | enable password <1700user> | ||
| Specify the password used during caller identification and CHAP and PAP authentication. For CHAP and PAP authentication, the username entered with this command must match the host name of the central-site router. | | username HQ password <guessme> |
Use this table to configure the Fast Ethernet interface, which connects your router to the local network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the Fast Ethernet interface. | | |||
| Configure this interface with an IP address and a subnet mask. | | ip address 172.16.25.1 255.255.255.224 | ||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for the this interface. | |
Use this table to configure parameters for the Frame Relay interface, which connects your router to the central-site router over the wide-area network.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the serial interface. | | |||
| Disable IP routing on this interface. | | |||
| Set the encapsulation method on this interface to Frame Relay. | | |||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for this interface. | |
Use this table to configure the Frame Relay subinterface network addresses.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the serial subinterface and specify this interface as a point-to-point connection. | | |||
| Configure this subinterface with an IP address. | | ip address 192.168.39.41 255.255.255.0 | ||
| Configure this subinterface with an IPX network number. | | ipx network 9876 | ||
| Assign a data link connection identifier (DLCI) to the Frame Relay subinterface. If you are unsure of the DLCI, use the number that you recorded in Step 4 of the previous "Verifying Your Configuration" section. | | |||
| Exit configuration mode for this interface. | |
Use this table to configure parameters for the ISDN interface, which connects your router to the central-site router if for some reason the Frame Relay connection fails.
| Step | Task | Router Prompt | Command | ||
| Enter configuration mode for the ISDN interface. | | |||
| Enter the service profile identifier (SPID) number assigned by the ISDN service provider to the B1 channel. This step is required only when the service provider has assigned a SPID to your ISDN line. Not all ISDN lines have SPIDs. | | isdn spid1 555987601 | ||
| Define the SPID number assigned by the ISDN service provider to the B2 channel. This step is required only when the service provider has assigned a SPID to your ISDN line. Not all ISDN lines have SPIDs. | | isdn spid2 555987602 | ||
| Enable IP routing on this interface without assigning an IP address. | | |||
| Set the encapsulation method on this interface to PPP. | | |||
| Configure this interface with an IPX network number. | | ipx network 1234 | ||
| Configure this interface to exchange routing information while the ISDN line is up. Routing updates do not bring up the ISDN line if it is down. | | ipx delay 200 | ||
| Disable fast switching and autonomous switching on this interface. | | |||
| Set the router to respond to a local server watchdog packets on behalf of a remote client (called spoofing). | | |||
| Configure the ISDN line to go down after a specified number of seconds with no network traffic. | | dialer idle-timeout 300 | ||
| Configure the telephone number that this interface dials to reach the central site. | | dialer-string 5552053 | ||
| Assign this interface to a dialer group. | | |||
| Disable weighted fair queueing for this interface. | | |||
| Enable CHAP and PAP authentication on this interface. CHAP authentication is attempted first. If the central-site router does not support CHAP, PAP is used for authentication. | | |||
| Enable multilink PPP on this interface. | | |||
| Enable the interface and the configuration changes that you have just made on the interface. | | |||
| Exit configuration mode for this interface. | |
Use this table to configure the router for Enhanced Interior Gateway Routing Protocol (EIGRP) and IP routing parameters that the router uses to connect to the central-site router.
| Step | Task | Router Prompt | Command | ||
| Configure the IP EIGRP routing process. | | router eigrp 202 | ||
| Specify a list of networks for the EIGRP routing process by entering the IP address of the directly connected network. | | network 172.16.0.0 | ||
| Specify a list of networks for the EIGRP routing process by entering the IP address of the directly connected network. | | network 192.168.0.0 | ||
| Specify that the router does not forward packets that are destined for a subnet of a network that has no network default route. | | |||
| Exit router configuration mode. | |
Use the table to configure access lists and static routes that determine when the ISDN line dials the central-site router.
| Step | Task | Router Prompt | Command | ||
| Establish a static IP route to the remote network.
| | ip route 0.0.0.0 0.0.0.0 192.168.41.41 150 | ||
| Establish a static IP route on the BRI interface to the remote network. | | ip route 192.168.41.41 255.255.0.0 BRI0 | ||
| Define a standard access list based on network variables. | | access-list 101 deny ip any 224.0.0.0 31.255.255.255 | ||
| Define a standard access list based on network variables. | | access-list 101 permit ip any any | ||
| Define a standard access list based on network variables. | | access-list 900 deny any any all any 457 | ||
| Define a standard access list based on network variables. | | access-list 900 deny rip any rip any rip | ||
| Define a standard access list based on network variables. | | access-list 900 deny sap any sap any sap | ||
| Define a standard access list based on network variables. | | access-list 900 permit any any all any all | ||
| Define a floating static IPX route to the central-site network. | | ipx route CBA 1234.0000.0c75.c689 floating-static | ||
| Define a floating static IPX route to the central-site network. | | ipx route CCB 1234.0000.0c75.c689 floating-static | ||
| Define a floating static IPX route to the central-site network. | | ipx route 5E11 1234.0000.0c75.c689 floating-static | ||
| Define a static route to an IPX server on the central-site network. | | ipx sap 4 MRKT_SERV 5E11.0000.0000.0001 452 2 | ||
| Define a static route to an IPX server on the central-site network. | | ipx sap 4 ENG_SERV CCB.0000.0000.0001 452 2 | ||
| Define a static route to an IPX server on the central-site network. | | ipx sap 4 COPR_SERV CBA.0000.0000.0001 452 2 | ||
| Specify an dialer list by list number and protocol (IPX) to define the "interesting" packets that can trigger a call to the destination. | | dialer-list 1 protocol ipx list 900 | ||
| Specify an dialer list by list number and protocol (IP) to define the "interesting" packets that can trigger a call to the destination. | | dialer-list 1 protocol ip list 101 |
Use this table to configure some parameters that control access to the router.
| Step | Task | Router Prompt | Command | ||
|---|---|---|---|---|---|
| Specify the console terminal line. | | |||
| Set the interval in minutes that the EXEC command interpreter waits until user input is detected. | | |||
| Specify a virtual terminal for remote console access. | | line vty 0 4 | ||
| Specify a password on the line. | | password <lineaccess> | ||
| Enable password checking at terminal session login. | | |||
| Exit configuration mode. | |
Take the following steps to verify that the ISDN line is configured to back up the Frame Relay line:
| Step | Task | ||
|---|---|---|---|
| Bring the Frame Relay connection down. This clears the routing table of all routes learned from the Frame Relay interface. | ||
| Use the ping command to test connectivity to any central-site router that is on the 192.168.0.0 network. This should cause the ISDN line to dynamically connect and dial the central-site router. | ||
| Bring the Frame Relay connection back up and confirm that the ISDN link disconnects. |
If you are having problems or the output that you received during the verification steps is very different from what is shown, you can troubleshoot your router with the Cisco IOS debug commands. The debug commands provide extensive command output that is not included in this document.
| Caution If you are not familiar with Cisco IOS debug commands, you should read the "Using Debug Commands" section in the "Cisco IOS Basic Skills" chapter before attempting any debugging. |
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