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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. |
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.
Complete these prerequisite steps before you power on and configure the Cisco CMTS:
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. |
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.
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—is a less secure and nonencrypted password.
To gain access to privileged-level commands, enter the desired password.
Complete the following steps to recover or replace a lost enable, enable secret, or console login password:
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:
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. |
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. |
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.
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:
| ||||||||||
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:
| ||||||||||
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. |
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
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 Action | Purpose | |
---|---|---|
Step 1 | interface 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 2 | ip 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 3 | ip helper-address
address
| Configures a helper address for the serial interface to forward broadcasts associated with the TFTP, BOOTP, and DNS requests. |
Step 4 | clock 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 5 | Ctrl-Z
| Exits configuration mode. |
Step 6 | copy 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 . . .
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 Action | Purpose | |
---|---|---|
Step 1 | interface {ethernet |
tokenring |
fddi}
interface-number
| Enters interface configuration mode for the specified LAN interface. |
Step 2 | ip address
address mask
| Specifies an IP address for the interface. |
Step 3 | ip helper-address
address
| (Optional) Configures a helper address to forward broadcasts associated with the TFTP, BOOTP, and DNS requests. |
Step 4 | Ctrl-Z
| Exits configuration mode. |
Step 5 | copy 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 . . .
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 Action | Purpose | |||
---|---|---|---|---|
Step 1 | interface serial 0
| Configures the serial interface that connects to the new router, and enters interface configuration mode. | ||
Step 2 | encapsulation frame-relay
| Configures Frame Relay encapsulation on the interface that connects to the new router. | ||
Step 3 | frame-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 4 | ip address
address mask
| Specifies an IP address for the interface. This step sets the IP address of the existing router. | ||
Step 5 | ip helper-address
address
| Configures a helper address for the TFTP server. | ||
Step 6 | clock 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 7 | Ctrl-Z
| Exits configuration mode. | ||
Step 8 | copy running-config startup-config
| Saves the configuration file to your startup configuration.
|
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 . . .
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 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 |
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.
|
interface ethernet 0 ip address 131.108.10.2 255.255.255.0 enable-password letmein ! line vty 0 password letmein ! end
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 Action | Purpose | |||
---|---|---|---|---|
Step 1 | enable password
| Enters privileged mode on the new router. | ||
Step 2 | copy 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.
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 3 | telnet existing
| Establishes a Telnet connection to the existing router. | ||
Step 4 | telnet newrouter
| From the existing router, establishes a Telnet connection to the new router. | ||
Step 5 | enable password
| Enters privileged EXEC mode. | ||
Step 6 | setup
| Enters setup mode to configure the new router. |
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:
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:
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. |
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: Restricted Rights Legend Use, duplication, or disclosure by the Government is 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!
--- 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
|
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:
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.
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. |
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)#
| ||||
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
| ||||
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
| ||||
Step 9 | Activate the upstream port:
Router(config-int)# no cable upstream port shutdown
| ||||
Step 10 | Exit to return to the configuration mode.
Router(config-if)# exit Router(config)#
| ||||
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
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
|
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
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Step 4 | Exit the integrated cable interface configuration mode.
Router(config-if)# exit
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Step 5 | Exit the global configuration mode.
Router(config)# exit
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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
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Step 2 | Enter the modular cable interface configuration mode.
Router(config)# interface Modular-Cable slot/{subslot | bay}/port:interface-number
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Step 3 | Shut down the modular cable interface.
Router(config-if)# shutdown
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Step 4 | Exit the modular cable interface configuration mode.
Router(config-if)# exit
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Step 5 | Exit the global configuration mode.
Router(config)# exit
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Configuring Interfaces with the Setup Facility
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
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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
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.
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. |
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. |
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.
Router# setup
The following is the System Configuration dialog:
Continue with configuration dialog? [yes/no]: yes
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.
The Cisco CMTS supports one downstream modulator and one upstream demodulator.
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:
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
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
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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