Cisco Systems UBR924 - page 46

show controllers cable-modem mac

46 Cisco IOS Release 12.0(5)T

burst profiles:

profile 0:

01 19 1D 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

profile 1:

01 19 1D 03 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

profile 2:

01 19 1D 04 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

profile 3:

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Most of the fields in this display are described in Table2, Show Controllers Cable-Modem Field Descriptions. Table7 describes the MIB statistics shown in the display.Below the MIB statistics in the show controllers cable-modem 0 mac hardware display, the BCM3300 registers section shows the DMA locations of the indicated processing routines of the Broadcom 3220 MAC chip within the Cisco uBR924.

Table7 Show Controllers Cable-Modem MIB Statistics Field Descriptions

Field Description

DS fifo full Number of times the downstream receive buffer on the Cisco uBR924 has become full.

Rerequests Number of registration requests sent by the Cisco uBR924 to the CMTS.

DS mac msg overruns Number of times the DMA controller has had a downstream MAC message and there

were no free MAC message buffer descriptors to accept the message.

DS data overruns Number of times the DMA controller has had downstream data and there were no free

data PDU buffer descriptors to accept the data.

Qualified maps Number of valid MAP messages received by the Cisco uBR924.

Qualified syncs Number of times the Cisco uBR924 has received synchronization with the downstream

channel.

CRC fails Number of cyclic redundancy checksums generated by the far-end device that did not

match the checksums calculated from the message portions of the packets received.

HDR check fails Number of cyclic redundancy checksums generated by the far-end device that did not

match the checksums calculated from the MAC headers of the packets received. The

MAC header CRC is a 16-bit Header Check Sequence (HCS) field that ensures the

integrity of the MAC header even in a collision environment.

Data pdus Total number of data PDUs (protocol data units) of all types received by the cable

interface.

Mac msgs Number of MAC messages received by the cable interface.

Valid hdrs Number of valid MAC headers received by the cable interface.

Contents

Main Troubleshooting Tips for the Cisco uBR924 Cable Access Router Feature Summary Benefits Restrictions Platforms Prerequisites Supported MIBs and RFCs List of Terms Page Page List of Terms Troubleshooting Tips for the Cisco uBR924 Cable Access Router 7 CMTS to Cable Modem Network Topology Figure1 Sample Topology Troubleshooting Steps Step 1Understand How Basic Initialization Works Page . Step 2Connect to the Cisco uBR924 the cable service company prior to installation at the subscriber site. Step 3Display the Cisco uBR924s MAC Log File Step 3Display the Cisco uBR924s MAC Log File 12 Cisco IOS Release 12.0(5)T Step 4Interpret the MAC Log File and Take Action Event 1Wait for the Link to Come Up Event 2Scan for a Downstream Channel, then Synchronize Event 3Obtain Upstream Parameters Event 4Start Ranging for Power Adjustments Event 5Establish IP Connectivity Event 6Establish the Time of Day Event 7Establish Security Event 8Transfer Operational Parameters Event 9Perform Registration Event 10Comply with Baseline Privacy Event 11Enter the Maintenance State Step 5Use Additional Troubleshooting Commands Command Reference show controllers cable-modem show controllers cable-modem Troubleshooting Tips for the Cisco uBR924 Cable Access Router 21 Following is sample output for the show controllers cable-modem 0 command: Table2 briefly describes some of the fields shown in the display. For more information, see the Page Page Page show controllers cable-modem bpkm Page show controllers cable-modem des DES engine registers are displayed in the following example: Table4 briefly describes some of the fields shown in the display. For more information, see the Page show controllers cable-modem filters MAC and SID filter information is displayed in the following example: Table5 briefly describes some of the fields shown in the display. For more information, see the Page show controllers cable-modem lookup-table show controllers cable-modem lookup-table Troubleshooting Tips for the Cisco uBR924 Cable Access Router 35 The mini-slot lookup table is displayed in the following example: show controllers cable-modem lookup-table 36 Cisco IOS Release 12.0(5)T Page show controllers cable-modem mac Example 1 If the DHCP server cannot not be reached, the error will look like this in the MAC log: Example 2 Example 3 Page Page Example 4 Page Page Example 5 Page Table8 describes the fields shown in the display. Page Page Page show controllers cable-modem phy show controllers cable-modem phy 54 Cisco IOS Release 12.0(5)T Physical transmit registers are displayed in the following example: Page show controllers cable-modem tuner Page Debug Commands debug cable-modem bpkm Page debug cable-modem bridge Page debug cable-modem error Page debug cable-modem interrupts Page debug cable-modem mac Example 1 Example 2 Example 3 Page Page Page debug cable-modem map