Cisco UBR924 - uBR 924 Router Troubleshooting Tips page 46

show controllers cable-modem mac
burst profiles:
Most of the fields in this display are described in Table 2, Show Controllers Cable-Modem Field
Descriptions. Table 7 describes the MIB statistics shown in the display.
Table 7
Field
DS fifo full
Rerequests
DS mac msg overruns
DS data overruns
Qualified maps
Qualified syncs
CRC fails
HDR check fails
Data pdus
Mac msgs
Valid hdrs
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.
46 Cisco IOS Release 12.0(5)T
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
Show Controllers Cable-Modem MIB Statistics Field Descriptions
Description
Number of times the downstream receive buffer on the Cisco uBR924 has become full.
Number of registration requests sent by the Cisco uBR924 to the CMTS.
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.
Number of times the DMA controller has had downstream data and there were no free
data PDU buffer descriptors to accept the data.
Number of valid MAP messages received by the Cisco uBR924.
Number of times the Cisco uBR924 has received synchronization with the downstream
channel.
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.
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.
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.