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Cisco Broadband Cable Command Reference Guide
OL-1581-08
Chapter 3 Cisco CMTS Show Commands
show interface cable mac-scheduler
Avg percent minislots lost
on late MAPs
Total upstream bandwidth that is currently being lost and unused
because the bandwidth allocation MAP message was sent late. This field
shows how often “allocation gaps” occur in the MAP scheduler, where
the CMTS allows significant amounts of time to pass before it schedules
a new MAP.
Ideally, the CMTS should schedule MAPs consecutively, so that no gaps
occur between the MAPs. However, when a large number of cable
modems are using different service flow schedules, gaps can appear in
the MAP scheduler, resulting in wasted scheduling time.
Tip
A typical value is only a few percentage points. If this field
shows larger values than this, use the
debug cable startalloc
command to display the number of minislots that are skipped
every time the CMTS has to adjust its MAP scheduler timer.
Sched Table Adm-State
Displays the current status of admitted service flows (which typically
indicates the number of voice grants):
•
Grants = Number of admitted Unsolicited Grant Service (UGS)
style upstream service flows.
•
Reqpolls = Number of admitted Real Time Polling Service (RTPS)
style upstream service flows.
•
Percentage of channel utilization that is associated with these
service flows.
UGS
Displays the number of service IDs (SIDs) being used for Unsolicited
Grant Service (UGS) service flows, and the current bandwidth reserved
by these SIDs, in bits per second.
UGS-AD
Displays the number of service IDs (SIDs) being used for UGS with
Activity Detection (UGS-AD) service flows, and the current bandwidth
reserved by these SIDs, in bits per second.
RTPS
Displays the number of service IDs (SIDs) being used for Real Time
Polling Service (RTPS) service flows, and the current bandwidth
reserved by these SIDs, in bits per second.
NRTPS
Displays the number of service IDs (SIDs) being used for non-RTPS
(NRTPS) service flows, and the current bandwidth reserved by these
SIDs, in bits per second.
BE
Displays the number of service IDs (SIDs) being used for Best-Effort
(BE) service flows, and the current bandwidth reserved by these SIDs,
in bits per second.
Table 3-52 show interface cable mac-scheduler Field Descriptions (continued)
Field
Description