Cisco Systems Recovering Cisco VG202, VG204, VG204XM Images Using Xmodem and ROM Monitor Commands

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Appendix A Using the ROM Monitor

Recovering Boot and System Images

Table A-1 Commonly Used ROM Monitor Commands (continued)

Command

Description

 

 

-?

Displays information about command syntax; for example:

 

rommon 16 > dis -?

 

usage : dis [addr] [length]

 

The output for this command is slightly different for the xmodem download

 

command:

 

rommon 11 > xmodem -?

 

xmodem: illegal option -- ?

 

usage: xmodem [-cyrxu] <destination filename>

 

-c CRC-16

 

-y ymodem-batch protocol

 

 

reset or i

Resets and initializes the voice gateway, similar to a power up.

 

 

dir device:

Lists the files on the named device; for example:

 

rommon 5 > dir flash:

 

Directory of flash:

 

2 1343152 -rw- cVG204-advipservices-k9.mz

 

rommon 6 >

 

 

meminfo

Lists the main memory information; for example:

 

rommon 6 > meminfo:

 

Main memory size: 128 MB.

 

Available main memory starts at 0x80018000

 

IO (packet) memory size: 5 percent of main memory

 

NVRAM size: 128 KB

 

 

boot commands

For more information about the ROM monitor boot commands, see the Cisco IOS

 

Configuration Fundamentals and Network Management Guide.

 

 

b

Boots the first image in flash memory.

 

 

b flash: [filename]

Attempts to boot the image directly from the first partition of flash memory. If you

 

do not enter a filename, this command will boot this first image in flash memory.

 

 

Recovering Boot and System Images

If your voice gateway experiences difficulties and no longer contains a valid Cisco IOS software image in flash memory, you can recover the Cisco IOS image by using the xmodem ROM monitor command. Use this command if the computer attached to your console has a terminal emulator that has xmodem capability. The xmodem command establishes a connection between a console and the voice gateway console port for disaster recovery if both the boot and system images are erased from flash memory.

The syntax for the command is xmodem [filename]. The optional parameter argument 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.

Note The Cisco VG202, Cisco VG202XM, Cisco VG204, and Cisco VG204XM voice gateways only support the -cand -yoptions.

Cisco VG202, Cisco VG202XM, Cisco VG204, and Cisco VG204XM Voice Gateways Software Configuration Guide

 

A-4

OL-16191-01

 

 

 

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Contents Americas Headquarters Text Part Number OL-16191-01Copyright 2008-2013 Cisco Systems, Inc. All rights reserved N T E N T S Changing the Configuration Register Manually A-5 Document Objectives AudienceConvention Description AccessibilityDocumentation Conventions Boldface fontRelated Documentation Cisco VG200 Series GatewaysViii About the Voice Gateways Port Numbering ConventionsBack Panel Feature Locations on the Cisco VG202 Chassis Chapter before you proceed to the next chapter Understanding Cisco IOS Software BasicsAbout Cisco IOS Software ReleaseGetting Help Command ModesCommand Mode Access Method VG Prompt Displayed Exit Method Exit , or logoutConfigure terminal Undoing a Command or FeatureSaving Configuration Changes Interface fast ethernetTypical Voice Gateway Deployment Scenario Where to Go NextUpgrading to a New Cisco IOS Release Page OL-16191-01 Preparing to Configure Your Cisco Voice Gateway About Configuring Your Voice GatewayProcedure Using the setup Command Determine the addressing plan for each network protocolEnter a hostname for the voice gateway Enter hostname VG VG204 Completing the Configuration OL-16191-01 Configuration guide and command reference publications Configuring the Hostname and PasswordRestriction Exit Verifying the Hostname and PasswordCommand or Action Purpose ExampleEnable Configure terminal Ip routing Configuring Fast Ethernet InterfacesBefore You Begin Exit Ctrl-z Saves the configuration changes to Nvram so that they Saving Configuration ChangesEnable Copy running-config startup-config Ctrl-z Are not lost during resets, power cycles, or powerOL-16191-01 Configuring the Voice Interface PrerequisitesPrompt changes to the privileged Exec enable prompt VG# Restriction for Configuring Auto-Configuration Auto-Configuration With a Dhcp ServerEnable Configure terminal Ip address dhcpVoice service voip Fax protocol t38 nseforce Auto-Configuration Without a Dhcp ServerCcm-manager config server tftpipaddress Ccm-manager sccp Configuration port Enables the Sccp and its related applicationsDownloads Cucm XML configuration files and enables Transcoding and conferencingEnables Cucm auto-configuration of the Cisco IOS Sccp Sccp ccm group group-numberDial-peer voice tags pots Service stcapp Command or Action Purpose Port Number Address Configuring the MAC Address ConventionLast Three Digits of the MAC 000 001 002 003Enters global configuration mode. You have entered Configuring CallsEnters privileged Exec mode Global configuration mode when the prompt changes toThree-Party Conferencing Call WaitingCaller ID Caller-id enable type Exit Caller-id enable typeAllows the sending or receiving of caller ID information OL-16191-01 Entering the ROM Monitor Mode Enable Configure terminal Config-register value Exit ReloadAbout the ROM Monitor Commands Listing the ROM Monitor Commands Command DescriptionsReset or Recovering Boot and System ImagesCommand Description MeminfoChanging the Configuration Register Manually Using the Configuration RegisterAbout Changing the Configuration Register Changing the Configuration Register Using PromptsCommand Description Using the Console Download FunctionAbout the Console Download Function Error Reporting Using Debug CommandsContext-Displays processor context for example Exiting the ROM Monitor Mode Rommon 9 meminfo Main memory size 128 MBMeminfo A-8reset A-4 FiguresReset command ROM monitor Commands Debug commands
Related manuals
Manual 48 pages 51.2 Kb

VG202, VG204XM, VG204, VG202XM specifications

Cisco Systems has long been a leader in the realm of networking technology, providing innovative solutions for businesses of all sizes. Among its products, the Cisco VG202XM, VG204, VG204XM, and VG202 series stand out as vital components in voice gateway solutions for IP telephony applications.

The Cisco VG202XM and VG204 series are designed to facilitate the convergence of voice and data as businesses transition to VoIP (Voice over Internet Protocol). These voice gateways offer seamless integration with legacy telephony systems while enabling the deployment of advanced IP-based telephony features. They are particularly useful for organizations looking to preserve their existing investments in traditional telephony infrastructure while embracing modern communication technologies.

One of the main features of the VG202XM and VG204 series is their support for two-line interfaces, catering to varying deployment needs. The VG202 provides two FXS (Foreign Exchange Station) ports, which allow businesses to connect analog phones and fax machines directly. The VG204 enhances this capability by offering four FXS ports, accommodating larger user bases and providing more connections for local telephony equipment.

These gateways support an array of voice codecs and can handle up to 16 concurrent calls, ensuring high-quality voice communication in busy environments. Their integration with Cisco's Unified Communications Manager allows users to access a host of advanced telephony features such as call forwarding, voicemail, and conferencing.

On the technology front, the VG202XM and VG204 series support both SIP (Session Initiation Protocol) and H.323 protocols, making them versatile for varied network environments. They also offer advanced QoS (Quality of Service) capabilities, ensuring that voice traffic is prioritized over other types of data, which is essential in maintaining call clarity and reliability.

Additionally, the VG204XM variant adds built-in safety features, such as power over Ethernet (PoE), which eliminates the need for separate power supplies for connected devices. This not only streamlines deployment but also enhances the reliability of the voice system.

In terms of management, these devices are equipped with Cisco's user-friendly interface, which simplifies configuration and monitoring. They can be managed through various tools offered by Cisco, making it easier for IT departments to maintain and optimize their voice services.

Overall, the Cisco VG202XM, VG204, VG204XM, and VG202 series deliver robust, scalable, and reliable solutions for businesses aiming to leverage the benefits of voice gateways in their enterprise networks. These devices not only provide essential voice capabilities but also pave the way for future growth and integration in an increasingly digital world.