Configuring the Cisco CMTS for the First Time

This chapter describes how to start up and configure the Cisco Cable Modem Termination System (CMTS) for the first time.


Note
These sections provide minimal configuration instructions.

For detailed configuration information see the:


Note
Be sure that you have appropriate addresses and values based on your network before you attempt to configure the router. Enter the show version command to display the release of Cisco software on your router.

Note

Be sure to use show command a few seconds after configuration changes, or it might cause a crash.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http:/​/​tools.cisco.com/​ITDIT/​CFN/​. An account on http:/​/​www.cisco.com/​ is not required.

Contents

Prerequisites for Configuring the Cisco CMTS

Complete these prerequisite steps before you power on and configure the Cisco CMTS:

  • Ensure that your network supports reliable broadband data transmission. Your plant must be swept, balanced, and certified based on National Television Standards Committee (NTSC) or appropriate international cable plant recommendations. Ensure your plant meets all Data-over-Cable Service Interface Specifications (DOCSIS) downstream and upstream radio frequency (RF) requirements.
  • Ensure that your Cisco CMTS is installed according to the instructions in the hardware installation guide available on Cisco.com.
  • Ensure that all other required headend or distribution hub routing and network interface equipment is installed, configured, and operational (based on the supported services). This includes:
    • All routers
    • Servers ( Dynamic Host Configuration Protocol (DHCP) servers, Trivial File Transfer Protocol ( TFTP) servers, and time-of-day (ToD) servers)
    • Network management systems
    • Other configuration or billing systems
  • Ensure that DHCP and DOCSIS configuration files have been created and pushed to appropriate servers so that each CM, when initialized, can:
    • Transmit a DHCP request
    • Receive an IP address
    • Obtain TFTP and ToD server addresses
    • Download a DOCSIS configuration file (or updated software image if using Cisco uBR924 cable access routers or Cisco uBR910 cable data service units (DSUs) in your network)
  • Ensure that customer premises equipment (CPE)—CMs or set-top boxes (STBs), PCs, telephones, or facsimile machines—meet requirements for your network and service offerings.
  • Be familiar with your channel plan to assign appropriate frequencies. Outline your strategies for setting up bundling, if applicable to your headend or distribution hub. As appropriate, obtain:
    • Passwords
    • IP addresses
    • Subnet masks
    • Device names
After these prerequisites are met, you are ready to configure the Cisco CMTS. This includes, at a minimum:
  • Configuring a host name and password for the Cisco CMTS
  • Configuring the CMTS to support IP over the cable plant and network backbone

Note
If you plan to use service-class-based provisioning, the service classes must be configured at the CMTS before CMs attempt to make a connection.

Booting and Logging onto the Cisco CMTS

The Cisco CMTS is administered using the Cisco command interpreter, called the EXEC. You must boot and log in to the router before you can enter an EXEC command.

    Step 1  

    Connect a terminal to the I/O controller console port of the Cisco CMTS and establish a terminal session. You can open a Terminal application (Hyper Terminal) on a PC as follows:

    • Connect using: Direct to Com 1

    • Set bits per second: 9600

    • Set data bits: 8

    • Set parity: none

    • Set stop bit: 1

    • Set flow control: none

    Step 2   Power on the Cisco CMTS. Enter no to choose the normal operating mode of the router. The user EXEC prompt appears: 
    Would you like to enter the initial dialog?[yes]: no
Router>

    Setting Password Protection on the Cisco CMTS


    Note
    For security purposes, the EXEC has two levels of access to commands: user EXEC mode and privileged EXEC mode. The commands available at the user level are a subset of those available at the privileged level.

    Tip
    Because many privileged-level EXEC commands are used to set operating parameters, password-protect these commands to prevent unauthorized use.

    Note
    An enable secret password can contain from 1 to 25 uppercase and lowercase alphanumeric characters. An enable password can contain any number of uppercase and lowercase alphanumeric characters. A number cannot be the first character. Spaces are valid password characters; for example, “two words” is a valid password. Leading spaces are ignored. Trailing spaces are recognized. Alphanumeric characters are recognized as uppercase or lowercase.

    Passwords should be different for maximum security. If you enter the same password for both during the setup script, the system accepts it, but you receive a warning message indicating that you should enter a different password.

    At the EXEC prompt, enter one of the following two commands to set password protection:

    • enable secret password—a very secure encrypted password.

    • enable—is a less secure and nonencrypted password.

    To gain access to privileged-level commands, enter the desired password.

    Recovering Lost Password on the Cisco CMTS

    Complete the following steps to recover or replace a lost enable, enable secret, or console login password:

      Step 1   Attach an ASCII terminal to the console port on your Cisco CMTS.
      Step 2   Configure the terminal to operate at 9600 baud, 8 data bits, no parity, and 1 stop bits.
      Step 3   If you can log in to the router as a nonprivileged user, enter the show version command to display the existing configuration register value. Note the value for later use. If you cannot log in to the router at all, continue with the next step.
      Step 4   Press the Break key or send a Break from the console terminal.
      • If Break is enabled, the router enters the ROM monitor, indicated by the ROM monitor prompt (rommon n>), where n is the number of the command line. Proceed to configuring the register.
      • If Break is disabled, power cycle the router (turn the router off or unplug the power cord, and then restore power). Within 60 seconds of restoring the power to the router, press the Break key or send a Break. This action causes the router to enter the ROM monitor and display the ROM monitor prompt (rommon 1>).
      Step 5   To set the configuration register on a Cisco CMTS, use the configuration register utility by entering the confreg command at the ROM monitor prompt as follows: 
      rommon 1> confreg

      Answer yes to the enable ignore system config info? prompt and note the current configuration register settings.

      Step 6   Initialize the router by entering the reset command as follows: 
      rommon 2> reset

      The router initializes, the configuration register is set to 0x142, the router boots the system image from Flash memory and enters the System Configuration dialog (setup), as follows: 

      --- System Configuration Dialog --
      Step 7   Enter no in response to the System Configuration dialog prompts until the following message appears: 
      Press RETURN to get started!
      Step 8   Press Return. The user EXEC prompt appears as follows: 
      Router>
      Step 9   Enter the enable command to enter privileged EXEC mode.
      Step 10   Enter the show startup-config command to display the passwords in the configuration file as follows: 
      Router# show startup-config
      Step 11   Scan the configuration file display looking for the passwords; the enable passwords are usually near the beginning of the file, and the console login or user EXEC password is near the end. The passwords displayed will look something like this: 
      enable secret 5 $1$ORPP$s9syZt4uKn3SnpuLDrhuei
enable password 23skiddoo
.
.
line con 0
 password onramp
      Note    The enable secret password is encrypted and cannot be recovered; it must be replaced. The enable and console passwords can be encrypted text or clear text.

      Proceed to the next step to replace an enable secret, console login, or enable password. If there is no enable secret password, note the enable and console login passwords if they are not encrypted and proceed to set the configuration register to the original value.

      Caution    Do not perform the next step unless you have determined that you must change or replace the enable, enable secret, or console login passwords. Failure to follow the steps as presented here could cause your router configuration to be erased.
      Step 12   (Optional)Enter the configure memory command to load the startup configuration file into running memory. This action allows you to modify or replace passwords in the configuration. 
      Router# configure memory
      Step 13   Enter the configure terminal command for configuration mode: 
      Router# configure terminal
      Step 14   To change all three passwords, enter the following commands: 
      Router(config)# enable secret newpassword1

Router(config)# enable password newpassword2
Router(config)# line con 0

Router(config)# password newpassword3

      Change only the passwords necessary for your configuration. You can remove individual passwords by using the no form of the previous commands. For example, entering the no enable secret command removes the enable secret password.

      Step 15   You must configure all interfaces to not be administratively shut down as follows: 
      Router(config)# interface fast ethernet 0/0/0

Router(config)# no shutdown

      Enter the equivalent commands for all interfaces that were originally configured. If you omit this step, all interfaces are administratively shut down and unavailable when the router is restarted.

      Step 16   Use the config-register command to set the configuration register to the original value noted earlier.
      Step 17   Press Ctrl-Z or type end to exit configuration mode: 
      
Router(config)# end
      Caution    Do not perform the next step unless you have changed or replaced a password. If you skipped changing or replacing the enable, enable secret, or console login passwords previously, then proceed now to reload. Failure to observe this sequence causes the system to erase your router configuration file.
      Step 18   Enter the copy running-config startup-config command to save the new configuration to nonvolatile memory: 
      Router# copy running-config startup-config
      Step 19   Enter the reload command to reboot the router: 
      
Router# reload
      Step 20   Log in to the router with the new or recovered passwords.

      Configuring the Cisco CMTS Using AutoInstall

      This section provides information about AutoInstall, a Cisco IOS software feature that allows you to configure a new router automatically and dynamically. The AutoInstall process involves connecting a new router to a network where an existing router is preconfigured, turning on the new router, and enabling it with a configuration file that is automatically downloaded from a TFTP server.

      The AutoInstall process begins any time a Cisco IOS software-based device is turned on and a valid configuration file is not found in nonvolatile random-access memory (NVRAM).

      The dynamic configuration of the new router occurs as follows:

      1. The new router acquires its IP address. Depending on the interface connection between the two routers and/or access servers, the new router's IP address is dynamically resolved by either SLARP requests or BOOTP or RARP requests.
      2. The new router resolves its name through network-confg, cisconet.cfg, or DNS.
      3. The new router automatically requests and downloads its configuration file from a TFTP server.

      If a host name is not resolved, the new router attempts to load router-confg or ciscortr.cfg.


      Note
      If you wish to configure the device manually, you should connect directly to the console port and ensure that the router is not connected to the network via any of the interface ports before you turn on the router. Note that it may take several minutes for the device to determine that AutoInstall is not connected to the network.

      Prerequisites for Using Autoinstall

      • Routers must be attached physically to the network using one or more of the following interface types:
        • Ethernet
        • Token Ring
        • FDDI
        • Serial with High-Level Data Link Control (HDLC) encapsulation
        • Serial with Frame Relay encapsulation

      Note
      HDLC is the default serial encapsulation. If the AutoInstall process fails over HDLC, the Cisco IOS software automatically configures Frame Relay encapsulation.

      Note
      Of Token Ring interfaces, only those that set ring speed with physical jumpers support AutoInstall. AutoInstall does not work with Token Ring interfaces for which the ring speed must be set with software configuration commands. If the ring speed is not set, the interface is set to shutdown mode.
      • A TCP/IP host on your network must be preconfigured to provide the required configuration files.
      • The TCP/IP host can exist anywhere on the network as long as the following conditions are maintained:
        • The host must be on the LAN or WAN side of the router’s line card connection to the WAN.
        • The User Datagram Protocol (UDP) broadcasts to and from the router.
        • The TCP/IP host is enabled.

      This functionality is coordinated by your system administrator at the site where the TCP/IP host is located. You should not use AutoInstall unless the required files are available on the TCP/IP host.

      Preparing for the AutoInstall Process

      Complete the following steps to prepare your Cisco CMTS CMTS router for the AutoInstall process:

        Step 1   Attach the appropriate synchronous serial cable to the synchronous serial interface 0 on the router.
        Step 2   Turn the power switch on each power supply to the ON (|) position. This action turns on power to the router. The router loads the operating system image from Flash memory; this process can take several minutes. If the remote end of the WAN connection is connected and properly configured, the AutoInstall process begins.
        Step 3   When the AutoInstall process is completed, use the copy running-config startup-config command to write the configuration data to the router’s nonvolatile random-access memory (NVRAM): 
        Router# copy running-config startup-config

        Completing this step saves the configuration settings that the AutoInstall process created to NVRAM. If you fail to do this, your configuration will be lost the next time you reload the router.

        Step 4   Choose your preferred method to verify the required file configurations for the AutoInstall Facility:
        Option Description

        Verify that the configuration file is on the TFTP server.

        Complete this task first (required). Verify that a configuration file for the new router resides on a TFTP server. This file can contain the full or minimum-required configuration for the administrator to Telnet into the new router (for configuration using Autoinstall).

        Note    In addition, complete one of the following two tasks.

        Verify that a file named network-confg also resides on the TFTP server.

        Complete this task, or the next.

        In this task, verify that the network-confg file on the TFTP server has an Internet Protocol (IP) host name entry for the new router. The TFTP server must be reachable from the new router.

        Add IP-address-to-host name mapping to a DNS database file.

        Complete this task, or the previous.

        In this task, add an IP address-to-host name mapping for the new router to a Domain Name System (DNS) database file on the TFTP server.

        Step 5   If the existing router is to help install the new router automatically via an HDLC-encapsulated serial interface using Serial Line Address Resolution Protocol (SLARP), that interface must be configured with an IP address whose host portion has the value 1 or 2. (AutoInstall over Frame Relay does not have this address constraint.) Subnet masks of any size are supported.
        Step 6   If the existing router is to help install the new router automatically using a Frame Relay-encapsulated serial interface, that interface must be configured with the following:
        • An IP helper address pointing to the TFTP server. In the following example, 171.69.2.75 is the address of the TFTP server: 
          ip helper 171.69.2.75
        • A Frame Relay map pointing back to the new router. In the following example, 172.21.177.100 is the IP address of the new router's serial interface, and 100 is the PVC identifier: 
          frame-relay map ip 172.21.177.100 100 dlci
        Step 7   If the existing router is to help install the new router automatically via an Ethernet, Token Ring, or FDDI interface using BOOTP or Reverse Address Resolution Protocol (RARP), then a BOOTP or RARP server also must be set up to map the new router's Media Access Control (MAC) address to its IP address.
        Step 8   IP helper addresses might need to be configured to forward the TFTP and DNS broadcast requests from the new router to the host that is providing those services.

        Performing the AutoInstall Procedure

        This procedure provides the steps to configure your Cisco uBR10012 router using AutoInstall.


        Note
        For a detailed description of the processes involved with AutoInstall, refer to the “Using AutoInstall and Setup” chapter in the Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.2 book on Cisco.com.

        To dynamically configure a new router using AutoInstall, complete the following steps.


        Note

        Steps 1, 2, and 3 are completed by the central administrator. Step 4 is completed by the person at the remote site.

          Step 1   Modify the existing router's configuration to support the AutoInstall procedure.
          Step 2   Set up the TFTP server to support the AutoInstall procedure.
          Step 3   Set up the BOOTP or RARP server if needed. A BOOTP or RARP server is required for AutoInstall using an Ethernet, Token Ring, FDDI, or Frame Relay-encapsulated serial interface. With a Frame Relay-encapsulated serial interface, the existing router acts as the BOOTP server. A BOOTP or RARP server is not required for AutoInstall using an HDLC-encapsulated serial interface.
          Step 4   Connect the new router to the network.

          Configuring an Interface to Allow Use of AutoInstall

          Using an HDLC-Encapsulated Serial Interface Connection

          To set up AutoInstall via a serial line with HDLC encapsulation (the default), you must configure the existing router. Use the following commands, beginning in global configuration mode:

             Command or ActionPurpose
            Step 1interface serial interface-number
                          		Configures the serial interface that connects to the new router with HDLC encapsulation (the default), and enters interface configuration mode for the specified interface number.  
            Step 2ip address address mask
                          		Enters an IP address for the interface. The host portion of the address must have a value of 1 or 2. (AutoInstall over Frame Relay does not have this address constraint.)  
            Step 3ip helper-address address
                          		Configures a helper address for the serial interface to forward broadcasts associated with the TFTP, BOOTP, and DNS requests.  
            Step 4clock rate bps
                          		(Optional) Configures a DCE clock rate for the serial line, unless an external clock is being used. This step is needed only for DCE appliques.  
            Step 5Ctrl-Z
                          		Exits configuration mode.  
            Step 6copy running-config startup-config
                          		Saves the configuration file to your startup configuration. On most platforms, this step saves the configuration to NVRAM. On the Cisco7000 family, this step saves the configuration to the location specified by the CONFIG_FILE environment variable.  

            In the following example, the existing router's configuration file contains the commands needed to configure the router for AutoInstall on a serial line using HDLC encapsulation: 

            Router# more system:startup-config

. . .

interface serial 0

 ip address 172.31.10.1 255.255.255.0

 ip helper-address 172.31.20.5

. . .

            Using an Ethernet, Token Ring, or FDDI Interface Connection

            To set up AutoInstall using an Ethernet, Token Ring, or FDDI interface, you must modify the configuration of the existing router. Use the following commands, beginning in global configuration mode:

               Command or ActionPurpose
              Step 1interface {ethernet | tokenring | fddi} interface-number
                              		Enters interface configuration mode for the specified LAN interface.  
              Step 2ip address address mask
                              		Specifies an IP address for the interface.  
              Step 3ip helper-address address
                              		(Optional) Configures a helper address to forward broadcasts associated with the TFTP, BOOTP, and DNS requests.  
              Step 4Ctrl-Z
                              		Exits configuration mode.  
              Step 5copy running-config startup-config
                              		Saves the configuration file to your startup configuration. On most platforms, this step saves the configuration to NVRAM. On the Cisco7000 family, this step saves the configuration to the location specified by the CONFIG_FILE environment variable.  

              Typically, the LAN interface and IP address are already configured on the existing router. You might need to configure an IP helper address if the TFTP server is not on the same network as the new router.

              In the following example, the existing router's configuration file contains the commands needed to configure the router for AutoInstall on an Ethernet interface: 

              
Router# more system:startup-config

. . .

interface Ethernet 0

ip address 172.31.10.1 255.255.255.0

ip helper-address 172.31.20.5

. . .

              Using a Frame Relay-Encapsulated Serial Interface Connection

              To set up AutoInstall via a serial line with Frame Relay encapsulation, you must configure the existing router. Use the following commands beginning in global configuration mode:

                 Command or ActionPurpose
                Step 1interface serial 0
                                  		Configures the serial interface that connects to the new router, and enters interface configuration mode.  
                Step 2encapsulation frame-relay
                                  		Configures Frame Relay encapsulation on the interface that connects to the new router.  
                Step 3frame-relay map ip ip-address dlci or frame-relay interface-dlci dlci option [protocol ip ip-address]   Creates a Frame Relay map pointing back to the new router. Or for point-to-point subinterfaces, assigns a data link connection identifier (DLCI) to the interface that connects to the new router, and provides the IP address of the serial port on the new router.  
                Step 4ip address address mask
                                  		Specifies an IP address for the interface. This step sets the IP address of the existing router.  
                Step 5ip helper-address address
                                  		Configures a helper address for the TFTP server.  
                Step 6clock rate bps
                                  		(Optional) Configures a DCE clock rate for the serial line, unless an external clock is being used. This step is needed only for DCE appliques.  
                Step 7Ctrl-Z
                                  		Exits configuration mode.  
                Step 8copy running-config startup-config
                                  		Saves the configuration file to your startup configuration.
                Note   

                On most platforms, this step saves the configuration to NVRAM. On the Cisco 7000 family, this step saves the configuration to the location specified by the CONFIG_FILE environment variable.

                 
                You must use a DTE interface on the new router because the network always provides the clock signal. In the following example, the existing router's configuration file contains the commands needed to configure the router for Frame Relay AutoInstall on a serial line: 
                
Router# more system:startup-config

. . .

interface serial 0

ip address 172.31.20.20 255.255.255.0

encapsulation frame-relay

frame-relay map ip 172.31.10.1 255.255.255.0 48

ip helper-address 172.31.20.5

. . .

                Setting Up the TFTP Server for Autoinstall

                For AutoInstall to work correctly, the new router must be able to resolve its host name and then download a name-confg or a name.cfg file from a TFTP server. The new router can resolve its host name by using a network-confg or a cisconet.cfg file downloaded from a TFTP server or by using the DNS.

                To set up a TFTP server to support AutoInstall, perform the following steps:

                  Step 1   Enable TFTP on a server. For information on this process, consult your host vendor's TFTP server documentation and RFCs 906 and 783.
                  Step 2   If you want to use a network-confg or cisconet.cfg file to resolve the new router's name, create the network-confg or cisconet.cfg file containing an IP address-to-host name mapping for the new router. Enter the ip host command into the TFTP config file, not into the router. The IP address must match the IP address that is to be dynamically obtained by the new router.

                  If you want to use DNS to resolve the new router's name, create an address-to-name mapping entry for the new router in the DNS database. The IP address must match the IP address that is to be dynamically obtained by the new router. For more information on this step, contact your DNS administrator or refer to RFCs 1101 and 1183

                  Step 3   Create the name-confg or name.cfg file, which should reside in the tftpboot directory on the TFTP server. The name part of name-confg or name.cfg filename must match the host name you assigned for the new router in the previous step. Enter configuration commands for the new router into this file.

                  The name-confg or the name.cfg file can contain either the new router's full configuration or a minimal configuration.

                  The minimal configuration file is a virtual terminal password and an enable password. It allows an administrator to Telnet into the new router to configure it. If you are using BOOTP or RARP to resolve the address of the new router, the minimal configuration file must also include the IP address to be obtained dynamically using BOOTP or RARP.

                  You can use the copy running-config tftp command to help you generate the configuration file that you later download during the AutoInstall process.
                  Note   

                  The existing router might need to forward TFTP requests and response packets if the TFTP server is not on the same network segment as the new router. When you modified the existing router's configuration, you specified an IP helper address for this purpose.

                  You can save a minimal configuration under a generic newrouter-confg file. Use the ip host command in the network-confg or cisconet.cfg file to specify newrouter as the host name with the address you will be dynamically resolving. The new router should then resolve its IP address, host name, and minimal configuration automatically.

                  Use Telnet to connect to the new router from the existing router and use the setup command facility to configure the rest of the interfaces. For example, the line in the network-confg or cisconet.cfg file could be similar to the following: 

                  ip host newrouter 131.108.170.1

                  The following host configuration file contains the minimal set of commands needed for AutoInstall using SLARP or BOOTP: 

                  enable-password letmein

!

line vty 0

password letmein

!

end

                  The preceding example shows a minimal configuration for connecting from a router one hop away. From this configuration, use the setup facility to configure the rest of the interfaces. If the router is more than one hop away, you also must include routing information in the minimal configuration.

                  The following minimal network configuration file maps the new router's IP address, 131.108.10.2, to the host name newrouter. The new router's address was learned via SLARP and is based on the existing router's IP address of 131.108.10.1. 

                  ip host newrouter 131.108.10.2

                  Setting Up the BOOTP or RARP Server for Autoinstall

                  If the new router is connected to the existing router using an Ethernet, Token Ring, or FDDI interface, you must configure a BOOTP or RARP server to map the new router's MAC address to its IP address. If the new router is connected to the existing router using a serial line with HDLC encapsulation, or if you are configuring AutoInstall over Frame Relay, the tasks in this section are not required.

                  To configure a BOOTP or RARP server, use one of the following:

                    Step 1  
                    Refer to your host vendor's documentation and RFCs 951 and 1395. If BOOTP is to be used to resolve the new router's IP address, configure your BOOTP server.
                    Step 2  
                    Refer to your host vendor's documentation and RFC 903. If RARP is to be used to resolve the new router's IP address, configure your RARP server.
                    Note    If the RARP server is not on the same subnet as the new router, use the ip rarp-server command to configure the existing router to act as a RARP server.
                    The following host configuration file contains the minimum set of commands needed for AutoInstall using RARP. It includes the IP address that will be obtained dynamically via BOOTP or RARP during the AutoInstall process. When RARP is used, this extra information is needed to specify the proper netmask for the interface. 
                    
interface ethernet 0

ip address 131.108.10.2 255.255.255.0

enable-password letmein

!

line vty 0

password letmein

!

end

                    Connecting the New Router to the Network

                    Connect the new router to the network using either an HDLC-encapsulated or Frame Relay-encapsulated serial interface or an Ethernet, Token Ring, or FDDI interface. After the router successfully resolves its host name, newrouter sends a TFTP broadcast requesting the file name-confg or name.cfg. The router name must be in all lowercase, even if the true host name is not. The file is downloaded to the new router, where the configuration commands take effect immediately. If the configuration file is complete, the new router should be fully operational.

                    To save the complete configuration to NVRAM, use the following commands in privileged EXEC mode:

                       Command or ActionPurpose
                      Step 1enable password
                                              		Enters privileged mode on the new router.  
                      Step 2copy running-config startup-config
                       

                      Saves the information from the name-config file into your startup configuration. On most platforms, this step saves the configuration to NVRAM.

                      Note    Verify that the existing and new routers (or access servers) are connected before entering the copy running-config startup-config EXEC command to save configuration changes. Use the ping EXEC command to verify connectivity. If an incorrect configuration file is downloaded, the new router will load NVRAM configuration information before it can enter AutoInstall mode.

                      If the configuration file is a minimal configuration file, the new router comes up, but with only one interface operational. Use the following commands to connect to the new router and configure it:

                       
                      Step 3telnet existing
                                              		Establishes a Telnet connection to the existing router.  
                      Step 4telnet newrouter
                                              		From the existing router, establishes a Telnet connection to the new router.  
                      Step 5enable password
                                              		Enters privileged EXEC mode.  
                      Step 6setup
                                              		Enters setup mode to configure the new router.  

                      Configuring the Cisco CMTS Router Using the Setup Facility

                      The Cisco CMTS Setup facility (also called the System Configuration dialog) is a useful and efficient tool for configuring your CMTS. The Cable Interface Setup Facility is an alternative mechanism to enable or configure Cisco CMTS parameters. The Setup facility supports automated configuration of upstream parameters.

                      In earlier releases, upstream ports were put in a default shut-down state after the Setup facility was run. You had to use the CLI to configure a fixed frequency or create a spectrum group, assign an interface to it, and enable each upstream port on a cable interface line card. The Setup facility now supports configuring and enabling upstream parameters.

                      The Setup facility supports the following functions so that cable interfaces and cable interface line cards are fully operational after initial setup:

                      • Cable-specific commands
                      • Upstream frequency definition

                      For each cable interface, the following information is mandatory: 

                      Per upstream:
															cable upstream n frequency f
        							no cable upstream n shutdown

                      Options include definition of the following information:

                      • DHCP server address.
                      • Options are also provided to set downstream frequency for the upconverter per interface.

                      If you do not plan to use AutoInstall, do not connect the router’s WAN or LAN cable to the channel service unit (CSU) and data service unit (DSU). If the WAN or LAN cable is connected to the CSU and DSU and the router does not have a configuration stored in NVRAM, the router attempts to run AutoInstall at startup.


                      Tip
                      The router might take several minutes to determine that AutoInstall is not set up to a remote TCP/IP host.

                      When the router determines that AutoInstall is not configured, it defaults to the Setup facility. If the LAN or WAN cable is not connected, the router boots from Flash memory and automatically runs the Setup facility.


                      Note
                      You can run the Setup facility when the enable prompt ( # ) is displayed, by entering the setup command in privileged EXEC mode.

                      Configuring Global Parameters with the Setup Facility

                        Step 1   When you first start the program, configure the global parameters to control system-wide settings:

                        Connect a console terminal to the console port on the I/O controller, and then boot the router from Flash memory.

                        After booting, the following information appears after about 30 seconds. When you see this information, you have successfully booted your router: 

                        
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subject to restrictions as set forth in subparagraph

(c) of the Commercial Computer Software - Restricted

Rights clause at FAR sec. 52.227-19 and subparagraph

(c) (1) (ii) of the Rights in Technical Data and Computer

Software clause at DFARS sec. 252.227-7013.

           cisco Systems, Inc.

           170 West Tasman Drive

           San Jose, California 95134-1706

Cisco Internetwork Operating System Software

IOS (tm) 7200 Software (UBR7200-IK1S-M), Version 12.1(10)EC

TAC Support: http://www.cisco.com/tac

Copyright (c) 1986-2001 by cisco Systems, Inc.

Compiled Fri 24-Nov-01 12:59 by yiyan

Image text-base: 0x60008950, data-base: 0x61478000

Compliance with U.S. Export Laws and Regulations - Encryption

This product performs encryption and is regulated for export

by the U.S. Government.

This product is not authorized for use by persons located

outside the United States and Canada that do not have prior

approval from Cisco Systems, Inc. or the U.S. Government.

This product may not be exported outside the U.S. and Canada

either by physical or electronic means without PRIOR approval

of Cisco Systems, Inc. or the U.S. Government.

Persons outside the U.S. and Canada may not re-export, resell,

or transfer this product by either physical or electronic means

without  prior approval of Cisco Systems, Inc. or the U.S.

Government.

Cisco uBR7246VXR (NPE300) processor (revision D) with 253952K/40960K bytes

of memory.

Processor board ID SAB0433019F

R7000 CPU at 262Mhz, Implementation 39, Rev 2.1, 256KB L2, 2048KB L3 Cache

6 slot VXR midplane, Version 2.0

Last reset from power-on

Bridging software.

X.25 software, Version 3.0.0.

2 FastEthernet/IEEE 802.3 interface(s)

4 Serial network interface(s)

4 Cable Modem network interface(s)

125K bytes of non-volatile configuration memory.

125440K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).

4096K bytes of Flash internal SIMM (Sector size 256K).

cable submgmt default active

Press RETURN to get started!
                        Note    The first two sections of the configuration script, the banner and the installed hardware, appear only at initial system startup. On subsequent uses of the Setup facility , the script begins with the following prompt. 
                        
     --- System Configuration Dialog ---

Continue with configuration dialog? [yes/no]: yes

At any point you may enter a question mark '?' for help.

Use ctrl-c to abort configuration dialog at any prompt.

Default settings are in square brackets '[]'.

Basic management setup configures only enough connectivity

for management of the system, extended setup will ask you

to configure each interface on the system
                        Step 2   When asked if you want to continue with the System Configuration dialog and enter basic management setup (displays the current interface summary), enter yes or press Return: 
                        Continue with configuration dialog? [yes/no]: yes
.
.
.
Would you like to enter basic management setup? [yes/no]: yes
                        Step 3   The interface summary appears, showing the state of configured and unconfigured interfaces. Choose which protocols to support on your interfaces. For IP-only installations, you can accept the default values for most of the questions. A typical configuration using IP follows and continues: 
                        Configuring global parameters: 

  Enter host name [Router]: router
                        Step 4   Enter the enable secret password, the enable password, and the virtual terminal password.

                        The enable secret password is a one-way cryptographic secret password used instead of the enable password when it exists. The enable password is used when there is no enable secret password and when using older software and some boot images. 

                        Enter enable secret: ******
Enter enable password: ******
Enter virtual terminal password: ******
                        Step 5   The Simple Network Management Protocol (SNMP) is the most widely supported open standard for network management. SNMP provides a means to access and set configuration and run-time parameters of routers and communication servers. SNMP also defines a set of functions that can be used to monitor and control network elements. Enter yes to accept SNMP management; enter no to refuse it: 
                        Configure SNMP Network Management? [no]:

    Community string [public]:
                        Step 6   In all cases, you will use IP routing. When you are using IP routing, select an interior routing protocol. You can specify one of only two interior routing protocols to operate on your system using the Setup facility, either In terior Gateway Routing Protocol (IGRP) or Routing Information Protocol (RIP). To configure IP routing, enter yes (the default) or press Return, and then select an interior routing protocol: 
                        
  Configure IP? [yes]:

    Configure IGRP routing? [yes]:

      Your IGRP autonomous system number [1]: 15
                        Step 7   Configure your line card interface parameters. The following example shows how an 8-port Ethernet line card is installed in line card slot 3. The Setup facility determines the status of all interfaces. To configure each active interface port for IP, enter yes (the default) or press Return . For all inactive ports, the default is no. You can press Return to accept the default. 
                        
Configuring interface Ethernet 1/0:

  Is this interface in use? [yes]: 

  Configure IP on this interface? [yes]: 

    IP address for this interface [19.2.22.4]: 

    Number of bits in subnet field [8]: 

    Class A network is 19.0.0.0, 8 subnet bits; mask is /16

Configuring interface Ethernet1/1:

  Is this interface in use? [no]: 

Configuring interface Ethernet1/2:

Is this interface in use? [no]: 

Configuring interface Ethernet1/3:

  Is this interface in use? [no]: 

Configuring interface Ethernet1/4:

  Is this interface in use? [no]: 

Configuring interface Ethernet1/5:

  Is this interface in use? [no]: 

Configuring interface Ethernet1/6:

  Is this interface in use? [no]: 

Configuring interface Ethernet1/7:

  Is this interface in use? [no]:
                        Step 8   Configure your cable interface. The following example shows a Cisco CMTS with cable interface. The Setup facility, for the most part, determines the status of all interfaces. To configure each active interface port, enter yes (the default) or press Return . For all inactive ports, the default is no. You can press Return to accept the default. 
                        
Configuring interface cable 5/0:

  Is this interface in use? [yes]: 

  Configure this interface? [yes]: 

  IP address for this interface [19.2.22.5]: 

  Number of bits in subnet field [8]: 

  Class A network is 19.0.0.0, 8 subnet bits; mask is /16

Configuring interface cable 1/1:

  Is this interface in use? [yes]: 

  Configure this interface? [yes]: 

  IP address for this interface [19.2.22.6]: 

  Number of bits in subnet field [8]: 

  Class A network is 19.0.0.0, 8 subnet bits; mask is /16

                        The configuration program displays the newly created command interface script: 

                        
The following command script was created:

hostname router

enable secret 5 $1$f0fc$A38P/KN/9yD3sEKSt6hKQ/

enable password betty

line vty 0 4

password wilma

snmp-server community public

!

ip routing

!

interface cable 5/0

ip address 19.2.22.5 255.255.0.0

router igrp 15

network 19.0.0.0

!

end
                        Step 9   When asked if you want to use this configuration, enter yes or press Return. 
                        Use this configuration? [yes/no]: yes
                        Step 10   Save the configuration to NVRAM: 
                        Router# copy running-config startup-config
                        Note    You must always manually save the configuration settings to NVRAM whenever they are modified.

                        Configuring Upstream Frequencies with the Setup Facility

                        Upstream parameters must be configured manually. After the Setup facility is run, upstream ports have a default state of “shutdown.” You have two methods to configure upstream channel frequencies:

                        • Configure a fixed frequency between 5 to 42 MHz for North American channel plans, and enable the upstream port.
                        • Create a global spectrum group, assign the interface to it, and enable the upstream port.

                        The cable interface card receiver accepts time-division multiplexed burst transmissions from cable interfaces (or CMs in set-top boxes), which are DOCSIS-based. The upstream port becomes “up” when it is assigned an upstream frequency and is configured to be administratively up.

                        The upstream port is frequency-agile. The frequency can change while the interface is up and carrying traffic.

                        Configuring Individual Upstream Modulation Profiles

                        You can define individual modulation profiles. A modulation profile consists of a table of physical layer characteristics for the different types of upstream bursts such as initial maintenance, long grant, request data, request, short grant, and station maintenance.


                        Note
                        Only qualified personnel should define upstream modulation profiles.

                        Complete these steps to activate upstream interfaces:

                          Step 1   After the Setup facility has initially configured noncable interfaces on the Cisco CMTS, enter the enable command and your password (privileged EXEC).
                          Step 2   Enter the configure terminal command to get into global configuration mode.
                          Step 3   In global configuration mode, configure modulation profiles and spectrum groups for your Cisco CMTS using the cable modulation-profile and cable spectrum-group commands.
                          Step 4   In cable interface configuration mode, configure various characteristics for the interface in question, using the cable upstream commands.

                          Configuring the Cisco CMTS Manually Using Configuration Mode

                          You can configure the Cisco CMTS manually if you prefer not to use the Setup facility or AutoInstall. Complete the following steps:

                            Step 1   Connect a console terminal to the console port on the I/O controller.
                            Step 2   When asked if you want to enter the initial dialog, answer no to go into the normal operating mode of the router: 
                            Would you like to enter the initial dialog? [yes]: no
                            Step 3   After a few seconds, the user EXEC prompt (Router>) appears. Type enable to enter enable mode (configuration changes can be made only in enable mode): 
                            Router> enable

                            The prompt changes to the enable mode (also called privileged EXEC) prompt: 

                            Router#
                            Step 4   Enter the configure terminal command at the enable prompt to enter configuration mode from the terminal: 
                            
Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#
                            Note    To see a list of the configuration commands available to you, enter ? at the prompt or type help while in configuration mode.
                            Step 5   At the Router(config)# prompt, enter the interface type slot/port command to enter the interface configuration mode: 
                            Router(config)# interface cable slot/port 
Router(config-if)#
                            Step 6   Set the downstream center frequency to reflect the digital carrier frequency of the downstream RF carrier (the channel) for the downstream port: 
                            Router(config-int)# cable downstream frequency down-freq-hz
                            Note    This command has no effect on the external upconverter. It is informational only.
                            Step 7   Activate the downstream port on the cable interface line card to support digital data transmission over the hybrid fiber-coaxial network: 
                            Router(config-int)# no shutdown
                            Step 8   Enter the fixed center frequency in Hz for your downstream RF carrier and the port number: 
                            Router(config-int)# cable upstream port frequency up-freq-hz
                            Note   

                            Be sure not to select an upstream frequency that interferes with that used for any other upstream application in your cable plant.

                            Note   

                            Repeat this step for each upstream port on the cable interface line card.

                            Step 9   Activate the upstream port: 
                            Router(config-int)# no cable upstream port shutdown
                            Note   

                            Repeat this step to activate each port used on your cable interface line card.

                            Step 10   Exit to return to the configuration mode. 
                            Router(config-if)# exit
Router(config)#
                            Note   
                            Step 11   Perform these steps on the other interfaces or type exit to return to enable mode. 
                            Router(config)# exit
Router# 

%SYS-5-CONFIG_I: Configured from console by console#
                            Step 12   Save the configuration to NVRAM: 
                            
Router# copy running-config startup-config

                            Removing the Cable Interfaces

                            Removing the Wideband Cable Interface

                            To remove or delete a wideband cable interface, do the following:

                              Step 1   Reset the configuration of the interface back to its default values using the default command in global configuration mode.

                              On the Cisco uBR10012 router: 

                              Router(config)# default interface wideband-Cable slot/{subslot | bay}/port:wideband-channel

                              On the Cisco uBR7200 series routers: 

                              Router(config)# default interface wideband-Cable slot/port:wideband-channel
                              Step 2   Enter the wideband cable interface configuration mode.

                              On the Cisco uBR10012 router: 

                              Router(config)# interface wideband-Cable slot/{subslot | bay}/port:wideband-channel

                              On the Cisco uBR7200 series routers: 

                              Router(config)# interface wideband-Cable slot/port:wideband-channel
                              Step 3   Shut down the wideband cable interface. 
                              Router(config-if)# shutdown
                              Step 4   Exit the wideband cable interface configuration mode. 
                              Router(config-if)# exit
                              Step 5   Exit the global configuration mode. 
                              Router(config)# exit

                              Removing the Integrated Cable Interface

                              To remove or delete an integrated cable interface, do the following:

                                Step 1   Reset the configuration of the interface back to its default values using the default command in global configuration mode.

                                On the Cisco uBR10012 router: 

                                Router(config)# default interface Integrated-Cable   slot/subslot/port:rf-channel

                                On the Cisco uBR7200 series routers: 

                                Router(config)# default interface Integrated-Cable   slot/port:rf-channel
                                Step 2   Enter the integrated cable interface configuration mode.

                                On the Cisco uBR10012 router: 

                                Router(config)# interface Integrated-Cable   slot/subslot/port:rf-channel

                                On the Cisco uBR7200 series routers: 

                                Router(config)# interface Integrated-Cable   slot/port:rf-channel
                                Step 3   Shut down the integrated cable interface. 
                                Router(config-if)# shutdown
                                Step 4   Exit the integrated cable interface configuration mode. 
                                Router(config-if)# exit
                                Step 5   Exit the global configuration mode. 
                                Router(config)# exit

                                Removing the Modular Cable Interface

                                To remove or delete a modular cable interface, do the following:

                                  Step 1   Reset the configuration of the interface back to its default values using the default command in global configuration mode. 
                                  Router(config)# default interface Modular-Cable slot/{subslot | bay}/port:interface-number
                                  Step 2   Enter the modular cable interface configuration mode. 
                                  Router(config)# interface Modular-Cable slot/{subslot | bay}/port:interface-number
                                  Step 3   Shut down the modular cable interface. 
                                  Router(config-if)# shutdown
                                  Step 4   Exit the modular cable interface configuration mode. 
                                  Router(config-if)# exit
                                  Step 5   Exit the global configuration mode. 
                                  Router(config)# exit

                                  Configuring Interfaces with the Setup Facility

                                  Configuring Ethernet Interfaces

                                    Step 1   In the following example, the system is being configured for an Ethernet LAN using IP. Respond to the prompts as follows, using your own addresses and mask at the setup prompts:

                                    Example: 
                                    Configuring interface parameters:
Configuring interface Ethernet0/0:
Is this interface in use? [no]: yes
Configure IP on this interface? [no]: yes
IP address for this interface: 1.1.1.10
Number of bits in subnet field [0]:
Class A network is 1.0.0.0, 0 subnet bits; mask is 255.0.0.0
                                    Step 2   Do not enable Internetwork Package Exchange (IPX) on this interface; IPX is not supported on the Cisco uBR7200 series universal broadband router:

                                    Example: 
                                    Configure IPX on this interface? [no]: no
                                    Step 3   If additional Ethernet interfaces are available in your system, enter their configurations when you are prompted.
                                    Step 4   Save the configuration to NVRAM:

                                    Example: 
                                    Router# copy running-config startup-config
                                    Note    You must always manually save the configuration settings to NVRAM whenever they are modified.

                                    Configuring Synchronous Serial Interfaces

                                    The synchronous serial interfaces are configured to allow connection to WANs through a CSU/DSU.

                                    Complete the following steps to configure the serial ports:

                                      Step 1   To configure serial port 0 enter yes:

                                      Example: 
                                      Configuring interface Serial0/0:
Is this interface in use? [no]: yes
                                      Step 2   Determine which protocols you want on the synchronous serial interface and enter the appropriate responses:

                                      Example: 
                                      Configure IP unnumbered on this interface? [no]:
IP address for this interface: 10.1.1.20
Number of bits in subnet field [0]:
Class A network is 10.0.0.0, 0 subnet bits; mask is 255.0.0.0
                                      Step 3   If additional synchronous serial interfaces are available in your system, enter their configurations when you are prompted.
                                      Step 4   Save the configuration to NVRAM:

                                      Example: 
                                      Router# copy running-config startup-config
                                      Note    You must always manually save the configuration settings to NVRAM whenever they are modified.

                                      The following sample display includes a continuous listing of all interface configuration parameters selected for Ethernet and synchronous serial interfaces. These parameters are shown in the order in which they appear on your console terminal.

                                      Tip    Only one Ethernet and one synchronous serial interface are configured for this example. 
                                      Configuring interface parameters:

Configuring interface Ethernet0/0:
  Is this interface in use? [no]: yes

  Configure IP on this interface? [no]: yes

   IP address for this interface: 10.1.1.10

   Number of bits in subnet field [0]:
   Class A network is 10.0.0.0, 0 subnet bits; mask is 255.0.0.0
 Configure IPX on this interface? [no]:
 Configure AppleTalk on this interface? [no]: no

Configuring interface Serial0/0:
  Is this interface in use? [no]: yes

  Configure IP on this interface? [no]: yes

  Configure IP unnumbered on this interface? [no]:
    IP address for this interface: 10.1.1.20

    Number of bits in subnet field [0]:
    Class A network is 10.0.0.0, 0 subnet bits; mask is 255.0.0.0
  Configure IPX on this interface? [no]:
  Configure AppleTalk on this interface? [no]:

The following configuration command script was created:

hostname Router
enable secret 5 $1$u8z3$PMYY8em./8sszhzk78p/Y0
enable password wilma
line vty 0 4
password s
snmp-server community public
!
ip routing
no vines routing
no ipx routing
no appletalk routing
no apollo routing
no decnet routing
no xns routing
no clns routing
no bridge 1

! Turn off IPX to prevent network conflicts.
interface Ethernet0/0
no ipx network
interface Ethernet0/1
no ipx network
!
interface Ethernet0/0
ip address 1.1.1.10 255.0.0.0
no mop enabled
!
interface serial0/0
ip address 1.1.1.20 255.0.0.0
ip route-cache cbus
no keepalive
!
!
router igrp 15
network 1.0.0.0
!
end

Use this configuration? [yes/no]: yes

[OK]
Use the enabled mode `configure' command to modify this configuration.

Press RETURN to get started!

                                      Your Cisco CMTS is now minimally configured and is ready to use. Use the setup command in provileged EXEC mode if you want to modify the parameters after the initial configuration. To perform more complex configurations, use the configure privileged EXEC command in global configuration mode.

                                      Setup Facility Examples

                                      In the following example, the upstream parameters for a cable interface line card in slot 5 are configured and enabled. Press Return to accept the default. 

                                      Do you want to configure Cable 5/0 interface? [no]: yes
Downstream setting frequency: 531000000
For cable upstream [0]
Shut down this upstream? [yes/no]: no
Frequency: 33808000
Would you like to configure the DHCP server? [yes/no]: yes
IP address for the DHCP server [X.X.X.X]: 10.0.0.2
Configure IP on this interface? [yes]:
IP address for this interface [10.20.133.65]:
Subnet mask for this interface [255.0.0.0]: 255.255.255.248
Class A network is 10.0.0.0, 29 subnet bits; mask is /29
In this example, the input above generates the following command interface script:
interface Cable 5/0
no shutdown
cable downstream frequency 531000000
no shutdown
cable downstream modulation 64qam
cable downstream annex B
cable downstream interleave-depth 32
no cable upstream 0 shutdown
cable upstream 0 frequency 33808000
cable helper-address 10.0.0.2
ip address 10.20.133.65 255.255.255.248

                                      Note
                                      Cable modems or set-top boxes with integrated cable modems are brought online when the utility is run.

                                      Note
                                      For Dynamic Host Configuration Protocol (DHCP)/time of day (TOD)/Trivial File Transfer Protocol (TFTP), a static route must exist to the host.

                                      Configuring the Cable Interface with the Extended Setup Facility

                                      The Setup facility creates an initial configuration. The basic management setup configures only enough connectivity for management of the system. The Extended Setup facility prompts you to configure each interface on the system.

                                      To invoke the configuration facility, use the following command: 
                                      Router# setup

                                      The following is the System Configuration dialog: 

                                      Continue with configuration dialog? [yes/no]: yes

                                      MAC-Layer Addressing

                                      The MAC-layer or hardware address is a standardized data link layer address required for certain network interface types. These addresses are not used by other devices in the network; they are unique to each port. The Cisco CMTS uses a specific method to assign and control the MAC-layer addresses for line cards.

                                      All LAN interfaces (ports) require unique MAC-layer addresses, also known as hardware addresses. Typically, the MAC address of an interface is stored on a memory component that resides directly on the interface circuitry; however, the online insertion and removal (OIR) feature requires a different method. The OIR feature lets you remove a line card and replace it with another identically configured one. If the new line card matches the line card you removed, the system immediately brings it online.

                                      To support OIR, an address allocator with a unique MAC address is stored in an EEPROM on the Cisco CMTS midplane. Each address is reserved for a specific port and slot in the router regardless of whether a line card resides in that slot.


                                      Note
                                      When hot swapping a line card with a different type of interface, you might have to reconfigure the interfaces. Refer to the hardware installation guide that ships with your CMTS or to the appropriate field-replaceable unit (FRU) document for more specific information regarding OIR.

                                      The MAC addresses are assigned to the slots in sequence. This address scheme allows you to remove line cards and insert them into other Cisco CMTS without causing the MAC addresses to move around the network or be assigned to multiple devices.

                                      Storing the MAC addresses for every slot in one central location means that the addresses stay with the memory device on which they are stored.

                                      Identifying the Interfaces on a Line Card

                                      The Cisco CMTS supports one downstream modulator and one upstream demodulator.

                                      • The Cisco CMTS supports the following defaults: QAM-256 at 40 MBps downstream, and QAM-16 at 5 Mbps upstream.
                                      • The card supports upstream channel widths of 200 kHz, 400 kHz, 800 kHz, 1.6 MHz, and 3.2 MHz.
                                      • The card outputs +42 dBmV and +/- 2 dBmV.
                                      • The downstream modulator has both an RF output, using the integrated upconverter, and an intermediate frequency (IF) output, which must be connected to an external upconverter.

                                      Identifying CM Line Card Slots

                                      On the Cisco CMTS, the cable interface line card is fixed and is always slot 1. To display information about a specific cable interface slot’s downstream channel, use the show interfaces cable command with the CM card’s slot number and downstream port number in the following format: 

                                      show interfaces cable slot/downstream-port[downstream]

                                      Use the slot number and downstream port number to display information about a downstream interface. You can abbreviate the command to sh int c . The following example shows the display for upstream channel port 0 on a Cisco CMTS: 

                                      Router# sh int c 5/0/0

                                      To display information about a specific cable interface slot’s upstream channel, use the show interfaces cable command. Include these CM card parameters:

                                      • Slot number
                                      • Downstream port number
                                      • Upstream port number
                                      Use this format: 
                                      show interfaces cable slot/downstream-port [upstream] upstream-port

                                      Use the slot number, downstream port number, and upstream port number to display information about an upstream interface. You can abbreviate the command to sh int c .

                                      The following example shows the display for upstream channel port 0 in cable interface slot 3 of a Cisco CMTS that is turned up: 

                                      Router# sh int c3/0/0 upstream

                                      Configuring Global Parameters

                                        Step 1   Access the host by responding to the following prompt: 
                                        Enter host name [cmts]:
                                        Step 2   The enable secret password is used to protect access to privileged EXEC and configuration modes. This password, after entered, becomes encrypted in the configuration.

                                        Respond to this prompt: 

                                        Enter enable secret [Use current secret]: aa
                                        Step 3   The enable password is used when you do not specify an enable secret password, with some older software versions, and some boot images.

                                        Respond to this prompt: 

                                        Enter enable password [rHoz]: bb
                                        Step 4   Use the virtual terminal password to protect access to the router over a network interface.

                                        Respond to this prompt: 

                                        Enter virtual terminal password [cc]: cc

                                        The following system information appears. 

                                        
Configure SNMP Network Management? [no]: 

Configure IP? [yes]: 

Configure IGRP routing? [yes]: 

Your IGRP autonomous system number [1]: 

Configure CLNS? [no]: 

Configuring interface parameters:

Do you want to configure FastEthernet0/0  interface? [yes]: 

Use the 100 Base-TX (RJ-45) connector? [yes]: 

Operate in full-duplex mode? [no]: 

Configure IP on this interface? [yes]: no

Do you want to configure Ethernet1/0  interface? [yes]: n

Do you want to configure Cable5/0/0  interface? [yes]: 

Downstream setting frequency  : 531000000

For cable upstream [0] 

Shut down this upstream ? [yes/no]: no

Frequency  : 33808000

Would you like to configure the DHCP server ? [yes/no]: yes

IP address for the DHCP server 

[X.X.X.X]: 10.0.0.2

Configure IP on this interface? [no]: yes

IP address for this interface: 10.20.133.65

Subnet mask for this interface [255.0.0.0] : 255.255.255.248

Class A network is 10.0.0.0, 29 subnet bits; mask is /29

                                        The following configuration command script is created: 

                                        
interface cable5/0/0

ip address 10.20.133.65 255.255.255.248

no ip mroute-cache

no keepalive

cable insertion-interval 500

cable downstream annex B

cable downstream modulation 64qam

cable downstream interleave-depth 32

cable downstream frequency 531000000

cable upstream 0 frequency 33808000

cable upstream 0 power-level 0

no cable upstream 0 shutdown

cable helper-address 10.0.0.2
                                        Note    For modems to acquire an IP address, they must have direct access to DHCP, TFTP, or ToD servers, or have a static route set.

                                        Saving Your Configuration Settings

                                        To store the configuration or changes to your startup configuration in NVRAM, enter the copy running-config startup-config command at the Router# prompt.

                                        This command saves the configuration settings you set using configuration mode, the Setup facility, or AutoInstall.


                                        Note
                                        If you do not save your settings, your configuration will be lost the next time you reload the router. 
                                        Router# copy running-config startup-config

                                        Reviewing Your Settings and Configurations

                                        • To view the current configuration of a Cisco CMTS, run the show running-config command at the command-line interface (CLI) prompt in EXEC mode or privileged EXEC mode.
                                        • To review changes you make to the configuration, use the EXEC show startup-config command to display the information stored in NVRAM.