Cisco Systems Understanding Cisco Debug Commands and IOS Debug for Voice Gateways
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Appendix A Using the ROM Monitor

Using Debug Commands

–Ymodem uses CRC-16 error checking to validate each packet. Depending on the device that the software is being downloaded from, this function might not be supported by Xmodem

•destination_file_name—Name of the system image file or the system configuration file. In order for the voice gateway to recognize it, the name of the configuration file must be voice gateway_confg.

Follow these steps to run the xmodem console download command.

Procedure

Step 1 Move the image file to the local drive where Xmodem will execute.

Step 2 Enter the xmodem command.

Error Reporting

Because the ROM monitor console download uses the console to perform the data transfer, when an error occurs during a data transfer, the system only displays the error messages on the console after the data transfer terminates.

If you changed the baud rate from the default rate, the error message is followed by a message telling you to restore the terminal to the baud rate specified in the configuration register.

Using Debug Commands

Most ROM monitor debugging commands are functional only when the Cisco IOS software has crashed or stops. If you enter a debugging command and the Cisco IOS crash information is not available, the system displays the following error message:

"xxx: kernel context state is invalid, can not proceed."

The following are the ROM monitor debugging commands:

•stack or k—Produces a stack trace; for example:

rommon 6> stack

 

Stack trace:

 

PC = 0x801111b0

 

Frame 00: FP = 0x80005ea8

PC = 0x801111b0

Frame 01: FP = 0x80005eb4

PC = 0x80113694

Frame 02: FP = 0x80005f74

PC = 0x8010eb44

Frame 03: FP = 0x80005f9c

PC = 0x80008118

Frame 04: FP = 0x80005fac

PC = 0x80008064

Frame 05: FP = 0x80005fc4

PC = 0xfff03d70

•context—Displays processor context; for example:

 

rommon 7> context

 

 

 

 

 

 

 

 

 

 

 

CPU

context of the most

recent exception:

 

 

 

 

 

 

PC

= 0x801111b0

MSR =

0x00009032

CR

= 0x53000035

LR

= 0x80113694

 

CTR

= 0x801065e4

XER =

0xa0006d36

DAR = 0xffffffff

DSISR

= 0xffffffff

 

DEC

= 0xffffffff

TBU

=

0xffffffff

TBL

= 0xffffffff

IMMR

= 0xffffffff

 

R0

= 0x00000000

R1

=

0x80005ea8

R2

= 0xffffffff

R3

= 0x00000000

 

R4

= 0x8fab0d76

R5

=

0x80657d00

R6

= 0x80570000

R7

= 0x80570000

 

R8

= 0x00000000

R9

=

0x80570000

R10

= 0x0000954c

R11

= 0x00000000

 

R12

= 0x00000080

R13 =

0xffffffff

R14

= 0xffffffff

R15

= 0xffffffff

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OL-16191-01

 

 

 

 

 

 

 

 

 

A-7

 

 

 

 

 

 

 

 

 

 

 

 

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Contents Text Part Number OL-16191-01 Americas HeadquartersCopyright 2008-2013 Cisco Systems, Inc. All rights reserved N T E N T S Changing the Configuration Register Manually A-5 Audience Document ObjectivesDocumentation Conventions AccessibilityConvention Description Boldface fontCisco VG200 Series Gateways Related DocumentationViii Port Numbering Conventions About the Voice GatewaysBack Panel Feature Locations on the Cisco VG202 Chassis About Cisco IOS Software Understanding Cisco IOS Software BasicsChapter before you proceed to the next chapter ReleaseCommand Mode Access Method VG Prompt Displayed Exit Method Command ModesGetting Help Exit , or logoutSaving Configuration Changes Undoing a Command or FeatureConfigure terminal 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 Determine the addressing plan for each network protocol Using the setup CommandEnter 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 Command or Action Purpose Verifying the Hostname and PasswordExit ExampleEnable Configure terminal Ip routing Configuring Fast Ethernet InterfacesBefore You Begin Exit Ctrl-z Enable Copy running-config startup-config Ctrl-z Saving Configuration ChangesSaves the configuration changes to Nvram so that they Are not lost during resets, power cycles, or powerOL-16191-01 Prerequisites Configuring the Voice InterfacePrompt changes to the privileged Exec enable prompt VG# Auto-Configuration With a Dhcp Server Restriction for Configuring Auto-ConfigurationIp address dhcp Enable Configure terminalVoice service voip Fax protocol t38 nseforce Auto-Configuration Without a Dhcp ServerCcm-manager config server tftpipaddress Ccm-manager sccp Downloads Cucm XML configuration files and enables Enables the Sccp and its related applicationsConfiguration port Transcoding and conferencingSccp Sccp ccm group group-number Enables Cucm auto-configuration of the Cisco IOSDial-peer voice tags pots Service stcapp Command or Action Purpose Last Three Digits of the MAC Configuring the MAC Address ConventionPort Number Address 000 001 002 003Enters privileged Exec mode Configuring CallsEnters global configuration mode. You have entered 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 Enable Configure terminal Config-register value Exit Reload Entering the ROM Monitor ModeAbout the ROM Monitor Commands Command Descriptions Listing the ROM Monitor CommandsCommand Description Recovering Boot and System ImagesReset or MeminfoAbout Changing the Configuration Register Using the Configuration RegisterChanging the Configuration Register Manually 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 Rommon 9 meminfo Main memory size 128 MB Exiting the ROM Monitor ModeFigures Meminfo A-8reset A-4Reset 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.
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