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Table of Contents

VxWorks and Engineering Debug Commands

This appendix provides a convenient reference to VxWorks and Engineering debug commands supported on the MGX 8260 media gateway. These commands can be entered at the command line via a console, modem or telnet session.

Note VxWorks and Engineering debug commands are available only to root users, and are shielded from all other users, including those with MGX 8260 node access level = 1 (SuperUser).

Overview

The operating system for the MGX 8260 is VxWorks. VxWorks is similar in command structure to UNIX with one exception. All non-numeric argument values are taken as strings and hence, must be enclosed in double quotes. For example, suppose command foo takes two arguments, arg1 and arg2, where arg1 is a character string and arg2 is a hexadecimal numeric value. This command would be entered as follows:

Command Listing

Table B-1 lists the VxWorks commands most commonly used on an MGX 8260 node. Table B-2 lists the Engineering debug commands employed by technicians servicing the MGX 8260 media gateway.

Complete information on VxWorks commands is contained in the VxWorks documentation available in downloadable PDF files from Wind River Systems, Inc. (http://www.wrs.com). Document titles include:

VxWorks Network Programmer's Guide
VxWorks Programmer's Guide
VxWorks Reference Manual

Note The commands listed in Table B-1 and Table B-2 do not appear in the listing generated by typing help while you are logged in as root.

Table B-1: VxWorks Commands

Command

Variables

Description

'directory'

Changes working directory from the current directory to the specified subdirectory. An instance of '.' (double periods) indicates one level up in the directory tree.

cnfkey

'String'(6-digit key)

Sets the 6-digit security key required for tftp file transfers.

copy

'file1','file2'

Copy one file to another file.

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Line (1-4)

Displays IP packet counts on SCC broadband interface module (BIM) ports. If the Line variable is not provided, the values shown are concatenated from all lines.

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None

Displays the current 6-digit tftp security key. See also cnfkey.

i

None

Displays a listing of all active processes.

Most of the processes will show a status of 'PEND', 'DELAY' or 'READY'. These are all normal and valid states. It is abnormal for even a single process to display a 'SUSPEND', 'PEND+S', 'DELAY+S', or 'READY+S' status.

Moreover, the existence of multiple tMRPSxxx or tDbmSxxx tasks indicates a problem. If a process such as tMGCP or tMRPC are suspended, there is a serious problem with the SCC.

lkAddr

address (Ox prefix to hexadecimal number from ti output)

Displays addressing information for an exception address detected for a suspended task.

Note The ti command outputs the INSTR address only when an exception has occurred.

lkup

'string' (alphabetical characters)

Causes the MGX 8260 to output a list of all commands containing the specified string in their name.

ll

None

Displays a 'long list' of the current directory's contents (similar to the Unix ls -l command).

ls

None

Displays the contents of the current directory.

ping

'IPAddress', x (IP address of target device in dotted notation; x = number of pings to send to the target IP address)

Sends a packet to a specified IP address and monitors its return. It is identical to the UNIX ping command except that the IP address is considered a string and must be enclosed in double quotes.

The ping will be initiated out of the SCC back card's Ethernet Mgmt Port.

Caution Always enter a number for x. If no number is specified for x, a continuous ping is assumed. The ping will continue endlessly until a ping failure is detected.

pwd

None

Displays the current working directory

remove

'filename'

Deletes the specified file.

Caution Exercise extreme caution when deleting a file. Only delete files you are certain do not need to reside on the SCC flash disk.

rename

'filename' 'new filename'

Renames the specified filename to the new filename.

td

'taskname'

Kills the specified task. The taskname can be derived from the listing displayed for the i command.

ti

'taskname'

The task information command should be implemented for a suspended task. Verifies that an exception has occurred and helps determine the cause of the exception. If an exception has occurred, obtain the memory location (32-bit hex address) following the INSTR field in the output of the ti command and issue the lkAddr command.

tt

'taskname'

Prints the stack trace of a task. Task trace allows you to investigate a suspended task or a task suspected of hogging CPU resources. The taskname can be derived from the listing displayed for the i command.

Table B-2:

Command	Variables	Description

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