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debug usb
debug usb
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
Syntax Description
rx
tx
Command Modes
Privileged EXEC
Command History
Release
12.1(5)XU
12.2(2)XA
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):
Cisco Broadband Cable Command Reference Guide
6-212
debug usb {rx | tx}
no debug usb {rx | tx}
Displays packets received on the USB interface.
Displays packets transmitted on the USB interface.
Modification
This command was introduced for the Cisco CVA122 Cable Voice Adapter.
Support was added for the Cisco uBR925 cable access router.
Chapter 6
Cable CPE Commands
OL-1581-07
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