Specifications
Table Of Contents
- Software Configuration Guide
- Contents
- Preface
- Understanding Interface Numbering and Cisco IOS Software Basics
- Understanding Interface Numbering
- Understanding Cisco IOS Software Basics
- Upgrading to a New Cisco IOS Release
- Where to Go Next
- Using the Setup Command Facility
- Before Starting Your Router
- Using the setup Command Facility
- Configuring Global Parameters
- Configuring Interface Parameters
- Completing the Configuration
- Where to Go Next
- Configuring with the Command-Line Interface
- Configuring the Host Name and Password
- Configuring 1-Port and 2-Port Ethernet Interfaces
- Configuring Fast Ethernet Interfaces
- Configuring Asynchronous/Synchronous Serial Network Modules or WAN Interface Cards
- Configuring 16-Port and 32-Port Asynchronous Network Modules
- Configuring ISDN BRI WAN Interface Cards
- Configuring T1 and E1 Interfaces
- Configuring T1 (FT1) WAN Interface Cards
- Configuring ATM Interfaces
- Configuring Inverse Multiplexing for ATM Interfaces
- Configuring Analog Modem Interfaces
- Configuring Wireless Multipoint Interfaces
- Checking the Interface Configuration
- Configuring 1-Port ADSL WAN Interface Card
- Configuring the NM-AIC-64, Contact Closure Network Module
- Configuring the 1-Port HSSI Network Module
- Configuring the Compression Network Module for the Cisco 3600 Series Routers
- Configuring the Digital Modem Network Module for the Cisco 3640 Router
- Prerequisites
- Configuration Tasks
- Configure the E1/T1 Network Module for ISDN PRI
- Configure the ISDN D-Channel Serial Interfaces
- Configure the Loopback Interface
- Configure the LAN Interface
- Create the Group Asynchronous Interface
- Configure the ISDN Dialer Interface
- Configure the Default IP Pool Information
- Configure Modem Lines for Dial-In and Dial-Out
- Configuration Example
- Configuring 1-Port G.SHDSL WAN Interface Card
- Saving Configuration Changes
- Where to Go Next
- Configuring Voice-over-IP
- Voice-over-IP Prerequisites
- Configuring the Voice Interface
- Voice-over-IP Configuration Examples
- Where to Go Next
- Configuration Examples
- Cisco 2600 Series Router Configuration Example
- Cisco 3631 Router Configuration Example
- Cisco 3725 Router Configuration Example
- 1-Port ADSL WAN Interface Card Configuration Examples
- NM-AIC-64, Contact Closure NetworkConfiguration Examples
- Cisco 3640 Central Site Configuration to Support ISDN and Modem Calls
- Formatting the Compact Flash Memory Cards
- Using the ROM Monitor
- Index
C-8
Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-03
Appendix C Using the ROM Monitor
Entering the ROM Monitor Mode
Note rommon-pref in the ROMMON command mode provides the same information as upgrade
rom-monitor preference command in the Cisco IOS Exec mod.
Procedures for Recovering Boot and System Images
If your router experiences difficulties and no longer contains a valid Cisco IOS software image in Flash
memory, you can recover the Cisco IOS image using one of the following ROM monitor commands:
• xmodem—Use this if the computer attached to your console has a terminal emulator that has
xmodem capability.
• tftpdnld—Use this if you have a TFTP server directly connected to the Ethernet 0 port.
Using the xmodem Command
The xmodem command establishes a connection between a console and the router console port for
disaster recovery if both the boot and system images are erased from Flash memory.
xmodem [filename]—Establishes an xmodem connection between the console and the router. The
optional parameter filename specifies the source file containing the Cisco IOS image.
Other options include the following:
• -c—use cyclic redundancy check (CRC-16)
• -y—use Ymodem transfer protocol
• -r—copy the image to DRAM for launch
• -x—do not launch image on completion of download
Using the tftpdnld Command
The tftpdnld command downloads a Cisco IOS software image from a remote server into Flash memory
using TFTP.
tftpdnld—Begins the TFTP copy command.
The following variables are required:
–
IP_ADDRESS—The IP address for the router you are using.
–
IP_SUBNET_MASK—The subnet mask for the router you are using.
–
DEFAULT_GATEWAY—The default gateway for the router you are using.
–
TFTP_SERVER—The IP address of the server from which you want to download the image file.
–
TFTP_FILE—The name of the file that you want to download.
–
The following variables are optional:
–
TFTP_VERBOSE—Print setting. 0=quiet, 1=progress, 2=verbose. The default is 1.
–
TFTP_RETRY_COUNT—Retry count for ARP and TFTP. The default is 7.
–
TFTP_TIMEOUT—Overall timeout of the download operation in seconds. The default is 2400
seconds.
–
TFTP_CHECKSUM—Performs a checksum test on the image. 0=no, 1=yes. The default is 1.