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Bridging and Routing Features for the Cisco uBR924 Cable Access Router 49
To display the number of packets and bytes of each protocol type passing through the cable access
router interface, use the accounting option with the show interface cable-modem command:
uBR924# show interface cable-modem 0 accounting
cable-modem0
Protocol Pkts In Chars In Pkts Out Chars Out
IP 545 185502 159 90240
Trans. Bridge 3878 964995 12597 1611142
ARP 73 3066 86 4128
Table 5 describes the fields shown in this display.
MIB counters on the cable interface are displayed in the next example:
uBR924# 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 Cisco uBR924 to the CMTS.
Downstream FIFO full Number of times the downstream input first-in first-out (FIFO) buffer became full on
the Cisco uBR924.
Re-requests Number of times a bandwidth request generated by the Cisco uBR924 was not
responded to by the CMTS.
DS MAC Message Overruns Number of times the Cisco uBR924’s DMA controller had a downstream MAC
message and there were no free MAC message buffer descriptors to accept the
message.