Cisco UBR904 Troubleshooting Guide - Page 39

Example 5, show controllers cable-modem mac state

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Example 5 show controllers cable-modem mac Table 7 Show Controllers Cable-Modem MIB Statistics Field Descriptions (Continued) Field CRC fails HDR check fails Data pdus Mac msgs Valid hdrs Description Number of cyclic redundancy checksums generated by the far-end device that do not match the checksums calculated from the message portions of the packets received. Number of cyclic redundancy checksums generated by the far-end device that do 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. Total number of data PDUs (protocol data units) of all types received by the cable interface. Number of MAC messages received by the cable interface. Number of valid MAC headers received by the cable interface. Below the MIB statistics in the display, the BCM3220 registers section shows the DMA locations of the indicated processing routines of the Broadcom 3220 MAC chip within the Cisco uBR904. The show controllers cable-modem mac state command summarizes the state of the cable MAC layer. If the cable MAC layer is in the wait_for_link_up_state, the information shown in the display corresponds to the last time the interface was up. This allows useful information to be acquired from this display even though the modem has not been able to range and register. The normal operational state of the interface is the maintenance_state. uBR904# show controller cable-modem 0 mac state MAC State: maintenance_state Ranging SID: 5 Registered: TRUE Privacy Established: TRUE MIB Values: Mac Resets: 0 Sync lost: 0 Invalid Maps: 0 Invalid UCDs: 0 Invalid Rng Rsp: 0 Invalid Reg Rsp: 0 T1 Timeouts: 0 T2 Timeouts: 0 T3 Timeouts: 4 T4 Timeouts: 0 Range Aborts: 0 DS ID: 1 DS Frequency: 663000000 DS Symbol Rate: 5056941 DS QAM Mode 64QAM DS Search: 88 453000000 855000000 6000000 89 93000000 105000000 6000000 90 111250000 117250000 6000000 91 231012500 327012500 6000000 92 333015000 333015000 6000000 93 339012500 399012500 6000000 94 405000000 447000000 6000000 95 123015000 129015000 6000000 96 135012500 135012500 6000000 Troubleshooting Tips for the Cisco uBR904 Cable Modem 39

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show controllers cable-modem mac
Troubleshooting Tips for the Cisco uBR904 Cable Modem
39
Below the MIB statistics in the display, the BCM3220 registers section shows the DMA locations of
the indicated processing routines of the Broadcom 3220 MAC chip within the Cisco uBR904.
Example 5
The
show controllers cable-modem mac state
command summarizes the state of the cable MAC
layer. If the cable MAC layer is in the
wait_for_link_up_state
, the information shown in the
display corresponds to the last time the interface was up. This allows useful information to be
acquired from this display even though the modem has not been able to range and register. The
normal operational state of the interface is the
maintenance_state
.
uBR904#
show controller cable-modem 0 mac state
MAC State:
maintenance_state
Ranging SID:
5
Registered:
TRUE
Privacy Established:
TRUE
MIB Values:
Mac Resets:
0
Sync lost:
0
Invalid Maps:
0
Invalid UCDs:
0
Invalid Rng Rsp:
0
Invalid Reg Rsp:
0
T1 Timeouts:
0
T2 Timeouts:
0
T3 Timeouts:
4
T4 Timeouts:
0
Range Aborts:
0
DS ID:
1
DS Frequency:
663000000
DS Symbol Rate:
5056941
DS QAM Mode
64QAM
DS Search:
88 453000000 855000000 6000000
89
93000000 105000000 6000000
90 111250000 117250000 6000000
91 231012500 327012500 6000000
92 333015000 333015000 6000000
93 339012500 399012500 6000000
94 405000000 447000000 6000000
95 123015000 129015000 6000000
96 135012500 135012500 6000000
CRC fails
Number of cyclic redundancy checksums generated by the far-end device that do 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 do 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.
Table 7
Show Controllers Cable-Modem
MIB Statistics Field Descriptions (Continued)
Field
Description