Table of Contents
Advertisement
Chapter 3
Cisco CMTS Show Commands
Table 3-52 show interface cable mac-scheduler Field Descriptions (continued)
Field
Avg percent minislots lost
on late MAPs
Sched Table Adm-State
UGS
UGS-AD
RTPS
NRTPS
BE
OL-1581-08
Description
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.
A typical value is only a few percentage points. If this field
Tip
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.
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.
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.
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.
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.
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.
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.
Cisco Broadband Cable Command Reference Guide
show interface cable mac-scheduler
3-217
Advertisement
Table of Contents
