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debug cable-modem mac
130
Cisco IOS Release 12.0(7)T
In addition, transmitted REG-REQs are displayed in hex dump format. The output from this
command is very verbose and is usually not needed for normal interface debugging. The command
is most useful when attempting to attach a Cisco uBR900 series cable access router to a CMTS that
is not DOCSIS-qualified.
For a description of the displayed fields of each message, refer to the DOCSIS Radio Frequency
Interface Specification, v1.0 (SP-RFI-I04-980724).
uBR924# debug cable mac messages
*Mar 7 01:44:06:
*Mar 7 01:44:06: UCD MESSAGE
*Mar 7 01:44:06: -----------
*Mar 7 01:44:06: FRAME HEADER
*Mar 7 01:44:06: FC - 0xC2 == MAC Management
*Mar 7 01:44:06: MAC_PARM - 0x00
*Mar 7 01:44:06: LEN - 0xD3
*Mar 7 01:44:06: MAC MANAGEMENT MESSAGE HEADER
*Mar 7 01:44:06: DA - 01E0.2F00.0001
*Mar 7 01:44:06: SA - 00E0.1EA5.BB60
*Mar 7 01:44:06: msg LEN - C1
*Mar 7 01:44:06: DSAP - 0
*Mar 7 01:44:06: SSAP - 0
*Mar 7 01:44:06: control - 03
*Mar 7 01:44:06: version - 01
*Mar 7 01:44:06: type - 02 == UCD
*Mar 7 01:44:06: RSVD - 0
*Mar 7 01:44:06: US Channel ID - 1
*Mar 7 01:44:06: Configuration Change Count - 4
*Mar 7 01:44:06: Mini-Slot Size - 8
*Mar 7 01:44:06: DS Channel ID - 1
*Mar 7 01:44:06: Symbol Rate - 8
*Mar 7 01:44:06: Frequency - 20000000
*Mar 7 01:44:06: Preamble Pattern - CC CC CC CC CC CC CC CC CC CC CC CC CC CC 0D 0D
*Mar 7 01:44:06: Burst Descriptor 0
*Mar 7 01:44:06: Interval Usage Code - 1
*Mar 7 01:44:06: Modulation Type - 1 == QPSK
*Mar 7 01:44:06: Differential Encoding - 2 == OFF
*Mar 7 01:44:06: Preamble Length - 64
*Mar 7 01:44:06: Preamble Value Offset - 56
*Mar 7 01:44:06: FEC Error Correction - 0
*Mar 7 01:44:06: FEC Codeword Info Bytes - 16
*Mar 7 01:44:06: Scrambler Seed - 0x0152
*Mar 7 01:44:06: Maximum Burst Size - 1
*Mar 7 01:44:06: Guard Time Size - 8
*Mar 7 01:44:06: Last Codeword Length - 1 == FIXED
*Mar 7 01:44:06: Scrambler on/off - 1 == ON
*Mar 7 01:44:06: Burst Descriptor 1
*Mar 7 01:44:06: Interval Usage Code - 3
*Mar 7 01:44:06: Modulation Type - 1 == QPSK
*Mar 7 01:44:06: Differential Encoding - 2 == OFF
*Mar 7 01:44:06: Preamble Length - 128
*Mar 7 01:44:06: Preamble Value Offset - 0
*Mar 7 01:44:06: FEC Error Correction - 5
*Mar 7 01:44:06: FEC Codeword Info Bytes - 34
*Mar 7 01:44:06: Scrambler Seed - 0x0152
*Mar 7 01:44:06: Maximum Burst Size - 0
*Mar 7 01:44:06: Guard Time Size - 48
*Mar 7 01:44:06: Last Codeword Length - 1 == FIXED
*Mar 7 01:44:06: Scrambler on/off - 1 == ON
*Mar 7 01:44:06: Burst Descriptor 2
*Mar 7 01:44:06: Interval Usage Code - 4
*Mar 7 01:44:06: Modulation Type - 1 == QPSK
*Mar 7 01:44:06: Differential Encoding - 2 == OFF
*Mar 7 01:44:06: Preamble Length - 128