Specifications

Command Reference
34
Cisco IOS Release 12.0(3)T
Table 5 describes the fields shown in this display.
MIB counters on the cable interface are displayed in the next example:
uBR904# show int cable-modem 0 counters
Cable specific counters:
Ranging requests sent : 50982
Downstream FIFO full : 0
Re-requests : 7277
DS MAC Message Overruns: 0
DS Data Overruns : 0
Received MAPs : 254339485
Received Syncs : 53059555
Message CRC failures : 0
Header CRC failures : 1394
Data PDUs : 5853
DS MAC messages : 307861745
Valid Headers : 307869065
Sync losses : 0
Pulse losses : 1
BW request failures : 6
Table 6 describes the counters shown in this display.
Table 5 Show Interfaces Cable-Modem Accounting Descriptions
Field Description
Protocol List of protocols operating on the cable-modem interface.
Pkts In Number of packets of each protocol received on the interface.
Chars In Number of bytes of each protocol received on the interface.
Pkts Out Number of packets of each protocol transmitted on the interface.
Chars Out Number of bytes of cach protocol transmitted on the interface.
Table 6 Show Interfaces Cable-Modem Counters Descriptions
Field Description
Ranging requests sent Number of ranging requests sent by the uBR904 to the CMTS.
Downstream FIFO full Number of times the downstream input first-in first-out (FIFO) buffer became full on
the uBR904.
Re-requests Number of times a bandwidth request generated by the uBR904 was not responded to
by the CMTS.
DS MAC Message Overruns Number of times the uBR904’s DMA controller 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 uBR904’s DMA controller had downstream data and there were
no free data PDU buffer descriptors to accept the data.
Received MAPs Number of times a MAP message passed all filtering requirements and was received
by the uBR904.
Received Syncs Number of times a timestamp message was received by the uBR904.
Message CRC failures Number of times a MAC message failed a cyclic redundancy (CRC) check.