Cisco Broadband Cable Command Reference Guide

debug usb
debug usb
Syntax Description
5-194
Cisco Broadband Cable Command Reference Guide
Chapter 5 Cable CPE Commands
To display the packets that are transmitted and received over the USB interface, use the debug usb
command in privileged EXEC mode. To turn off debugging for the USB interface, use the no form of
this command.
Cisco uBR925 cable access router, Cisco CVA122 Cable Voice Adapter
debug usb {rx | tx}
no debug usb {rx | tx}
Command Modes Privileged EXEC
Command History
rx Displays packets received on the USB interface.
tx Displays packets transmitted on the USB interface.
Release Modification
12.1(5)XU This command was introduced for the Cisco CVA122 Cable Voice Adapter.
12.2(2)XA Support was added for the Cisco uBR925 cable access router.
Usage Guidelines This command displays a hexadecimal dump of each packet transmitted or received on the USB interface
and should be used only while debugging CM operation. Displaying debugging messages, especially for
each packet transmitted or received, consumes system resources. Turning on too many messages could
negatively affect system performance.
Examples The following shows typical output from the debug usb command.
Router# debug usb rx
USB Rx debugging is on
Router# debug usb tx
USB Tx debugging is on
Nov 22 11:01:36.909: 0x040: 72 6C 19 E7 0C 12
Nov 22 11:12:18.447: USB transmit packet data (size=114):
Nov 22 11:12:18.447: 0x000: 00 01 64 FF E1 13 00 01 64 FF E1 12 08 00 45 00
Nov 22 11:12:18.447: 0x010: 00 64 16 32 00 00 FF 01 62 FF 20 01 01 01 20 01
Nov 22 11:12:18.451: 0x020: 01 65 08 00 40 5D 1E 3D 07 2D 00 00 00 00 04 19
Nov 22 11:12:18.451: 0x052: AB CD AB CD AB CD AB CD AB CD AB CD AB CD
Nov 22 11:12:18.455: 0x060: AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD
Nov 22 11:12:18.455: 0x070: AB CD
Nov 22 11:12:18.459: USB receive packet data (size=60):
Nov 22 11:12:18.459: 0x000: FF FF FF FF FF FF 00 01 64 FF E1 13 08 06 00 01
Nov 22 11:12:18.463: 0x010: 08 00 06 04 00 01 00 01 64 FF E1 13
Nov 22 11:12:18.463: 0x01C: 20 01 01 65
Nov 22 11:12:18.463: 0x020: 00 00 00 00 00 00 20 01 01 01 00 00 00 00 00 00
Nov 22 11:12:18.467: 0x030: 00 00 00 00 00 00 00 00 00 00 00 00
Nov 22 11:12:18.467: USB transmit packet data (size=60):
OL-1581-05