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Chapter 3
Cisco CMTS Show Commands
Table 3-61 show interface cable upstream Field Descriptions (continued)
Field
JIB counters for ifInErrors
Rng Polls
Cont Mslots
CIR Grants
BE Grants
Grant Shpr
Reserved slot table
Req IEs
Req/Data lEs
Init Mtn IEs
Stn Mtn IES
Long Grant lEs
ShortGrmg lEs
Avg upstream channel utilization Average percent of the upstream channel bandwidth being used for
Avg percent contention slots
Avg percent initial ranging slots Average percent of slots in the initial ranging state.
Avg percent minislots lost on
late Maps
OL-1581-08
Description
Error counters for the upstream interface that are maintained by the
MAC controller that is onboard certain cable interface line cards
(such as the Cisco uBR-MC5X20S and Cisco uBR-MC28U/X):
us_error_frame_drop = Number of frames dropped from the
•
upstream's errored frame queue because the queue was already
full with packets with various errors, such as CRC, HCS,
fragmentation, concatenation, and unrecognized frame errors.
us_crc_error = Number of packets with CRC errors that were
•
received on the upstream.
us_hcs_error = Number of packets with header checksum
•
(HCS) errors that were received on the upstream.
us_cont_collision = Number of packets that were received
•
with a collision detected during contention transmit
opportunity.
•
us_uncorr_cw_rcvd = Number of packets with uncorrectable
codewords that were received on the upstream.
The MAC scheduler queue showing number of ranging polls.
MAC scheduler queue showing number of forced contention
request slots in MAPS.
MAC scheduler queue showing number of CIR grants pending.
MAC scheduler queue showing number of Best-Effort grants
pending.
MAC scheduler queue showing number of grants buffered for
traffic shaping.
Number of slots that the MAC scheduler has placed in the reserved
slot table at the time that the command was made.
Counter of Request lEs sent in MAPS.
Counter of Request/Data lEs sent in MAPS.
Counter of Initial Maintenance lEs.
Number of station maintenance (ranging poll) lEs.
Number of long grant lEs.
Number of short grantlEs.
user (Ethernet) traffic. This does not include DOCSIS MAC-layer
packets.
Average percent of slots available for CMs to request bandwidth
using contention mechanisms. Also indicates the amount of unused
capacity in the network.
Average percent of slots that were lost because a MAP interrupt
was too late.
Cisco Broadband Cable Command Reference Guide
show interface cable upstream
3-247
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