Cisco uBR900 Series : Specifications : Page 96

show controllers cable-modem mac

96

Cisco IOS Release 12.0(7)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

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

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

profile 3:

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 Table 15, show dhcp server Field Descriptions.

Table 11 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 uBR900 series.

Table 11 show controllers cable-modem MIB Statistics Field Descriptions

Field Description

DS ﬁfo full Number of times the downstream receive buffer on the Cisco uBR900 series has

become full.

Rerequests Number of registration requests sent by the Cisco uBR900 series 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 uBR900 series.

Qualiﬁed syncs Number of times the Cisco uBR900 series 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.