Cisco Systems UBR924 - page 124

C-4

CiscouBR924 Software Configuration Guide

OL-0337-05 (8/2002)

AppendixC Using the ROM Monitor

Commands

•confreg [hexnum]—Executing the confreg command with the argument hexnum changes the virtual

configuration register to match the hex number specified. Without the argument, confreg dumps the

contents of the virtual configuration register in English and allows the user to alter the contents. You

are prompted to change or keep the information he ld in each bit of the virtual configuration register.

In either case, the new virtual configuration register value is written into non-volatile memory

(NVRAM, also known as Flash memory) and does not take effect until you reset or power cycle the

router.

The configuration register resides in Flash memory. The configuration register is identical in

operation to other Cisco access servers. Enter confreg for the menu-driven system, or enter the new

value of the register in hexadecimal.

Note The value is always interpreted as hexadecimal. The confreg utility will print a before and after view of

the configuration register when used in menu-driven mode.

For example:

rommon 7 > confreg

Configuration Summary

enabled are:

console baud: 9600

boot: the ROM Monitor

do you wish to change the configuration? y/n [n]: y

enable “diagnostic mode”? y/n [n]: y

enable “use net in IP bcast address”? y/n [n]:

enable “use all zero broadcast”? y/n [n]:

enable “ignore system config info”? y/n [n]:

change console baud rate? y/n [n]: y

enter rate: 0 = 9600, 1 = 4800, 2 = 1200, 3 = 2400 [0]: 0

change the boot characteristics? y/n [n]: y

enter to boot:

0 = ROM Monitor

1 = the boot helper image

2-15 = boot system

[0]: 0

Configuration Summary

enabled are:

diagnostic mode

console baud: 9600

boot: the ROM Monitor

do you wish to change the configuration? y/n [n]:

You must reset or power cycle for new config to take effect.

•cont [-b]—Continues a loaded image that has stopped. For example:

reboot> launch

monitor: command “launch” aborted due to user interrupt

diagmon 7 > cont

reboot >

•context—Displays the CPU context at the time of the fault. The context from the kernel mode and

process mode of a booted image is displayed, if available. For exampl e:

rommon 6 > context

CPU Context:

Contents

Main Cisco uBR924 Cable Access Router Software Configuration Guide Page CONTENTS Page Page Page Preface Audience Purpose Organization Document Conventions Page x loss of data. this guide. paragraph. Acronyms and Terms Related Documentation Cisco uBR924 Cable Access Router CMTS Hardware Installation Publications Cisco IOS Publications Configuration Editor and Network Management Publications Subscriber Publications Obtaining Documentation World Wide Web Documentation CD-ROM Ordering Documentation Obtaining Technical Assistance Technical Assistance Center Documentation Feedback Page Overview Cisco IOS Software Release Feature Sets Base IP DOCSIS-Compliant Bridging Home Office (Easy IP) Value Telecommuter Performance Telecommuter Value Small and Branch Office Performance Small and Branch Office Feature Descriptions Cable Monitor Web Diagnostics Tool Cisco Cable Clock Card Support Cisco IOS Firewall DOCSIS-Compliant Bridging DOCSIS Baseline Privacy Interface Dynamic Host Configuration Protocol Server Dynamic Host Configuration Protocol Proxy Support Enhanced IP Bridging Ecosystem Gatekeeper Interoperability Enhancements Fax over IP H.323v2 (Gateway/Gatekeeper) IP Address Negotiation IPsec Network Security Layer 2 Tunneling Protocol Media Gateway Control Protocol V12.1.3T NetRanger SupportCisco IOS Intrusion Detection Network Address Translation and Port Address Translation Network Address Translation Support for NetMeeting Directory (Internet Locator Service) Quality of Service Quality of ServiceDOCSIS 1.0+ Extensions Routing Information Protocol Version 2 Secure Shell Version 1 Simple Gateway Control Protocol Triple Data Encryption Standard VPN IPsec EnhancementDynamic Crypto Map Initial Provisioning Supporting Multiple Classes of Service DOCSIS 1.0 Static Profiles DOCSIS 1.0+ and 1.1 Dynamic Profiles Creating Multiple Profiles User Registrar Modem Registrar Cisco Network Registrar Access Registrar Page DOCSIS-Bridging Configuration DHCP Server Configuration DOCSIS Configuration File Page Page Cisco IOS Software Image Cisco IOS Configuration File Using the Vendor-Specific Information Field 2-8 Sample Configuration for DOCSIS-Compliant Bridging This configuration shows the following requirements for DOCSIS-compliant br idging: Configuring the Attached CPE Devices Reconfiguring DOCSIS-Compliant Bridging Page Advanced Data-Only Configurations Data-Only Routing Page Routing with DHCP Server 3-5 NAT/PAT Configuration Page NAT/PAT Configuration with DHCP Proxy Page Using NAT and DHCP Proxy and Copying Configuration Files IPSec (56-bit) Example Page Sample Configuration 3-14 56-bit DES-CBC encryption (the default) MD5 (HMAC variant) hash algorithm Pre-shared authentication keys 768-bit Diffie-Hellman group (the default) Additional Documentation IPSec (3DES) Example L2TP Example Page 3-19 Page Voice over IP Configurations Overview Introduction Page Voice Handling Quality of Service Support H.323v2 Protocol SGCP and MGCP Protocol Stack H.323v2 Static Bridging Configuration Page 4-9 H.323v2 Static Routing Configuration 4-11 routing mode. H.323v2 Dynamic Mapping Configuration Note The Cisco uBR924 router can use H.323v2 dynamic mapping in either DOCSIS-bridging mode or Page Page Page SGCP Configuration Page 4-17 MGCP Configuration Page 4-20 Command Purpose Step22 uBR924# copy running-config startup-config Step23 uBR924# show startup-config Display the configuration file that was just created. Building configuration... 4-21 Page A Using Cisco IOS Software Accessing the Routers Command-Line Interface Connecting Using Telnet Connecting to the Console Port Understanding the Command-Line Interface Command Modes User EXEC Mode Privileged EXEC Mode Global Configuration Mode Interface Configuration Mode Context-Sensitive Help Command History Features Displaying the Command History Editing Previous Commands Command History Buffer Size Using Output Modifiers Understanding Cisco IOS Configuration Files Downloading the Configuration File Startup and Run-Time Configuration Files Displaying the Configuration Files File Format Useful Commands Page B Using the Cable Monitor Tool Enabling the Cable Monitor Configuration Modes Security Considerations Disabling the Cable Monitor Accessing the Cable Monitor Through the Cable Interface when the Cable Interface is Operational Through the Ethernet Interface when the Cable Interface is Not Operational Sample Pages Page Home Page Page Initialization Information Page Page Voice Ports Information Page CPE State Information Page Cable Interface Information Page Performance Information Page Debug Information Page Page C Using the ROM Monitor Entering the ROM Monitor Command Conventions Commands Page Page Page Page D New and Changed Commands Reference Commands Reserved for DOCSIS Use Page INDEX Symbols Numerics A D E F G H I L O P Q R U V