Cisco Systems uBR7200 Series manual Enhanced Show Interface Upstream Output

Chapter 4 Troubleshooting the System

Understanding Show Command Responses

Table 4-18 Show Interface Cable Upstream Command Field Descriptions (continued)

Field	Description
Avg percent minislots lost on	Indicates on average what percent of slots are lost because
late MAPs	a MAP interrupt was too late
Current minislot count	Indicates the current minislot count at the CMTS. FLAG
(formerly: Last Minislot Stamp	indicates the timebase reference. This field is used only by
(current_time_base))	developers.
Scheduled minislot count	Indicates the furthest minislot count allocated at the
(formerly: Last Minislot Stamp	indicated time. FLAG indicates the timebase reference.
(scheduler_time_base))	This field is used only by developers.

Enhanced Show Interface Upstream Output

The show interface cable upstream command is enhanced in Cisco IOS Release 12.0(7)XR2, Cisco IOS Release 12.1(1a)T1, or higher CMTS images to display detailed MAC scheduler state information for the upstream port. The example below illustrates the new display:

cmts#show interface cable 3/0 upstream 0 Cable3/0:Upstream 0 is up

Received 13 broadcasts, 0 multicasts, 110 unicasts 0 discards, 106 errors, 0 unknown protocol

123 packets input, 0 uncorrectable

106 noise, 0 microreflections

Total Modems On This Upstream Channel :3 (3 active)

Default MAC scheduler
Queue[Rng Polls]	0/20, fifo queueing, 0 drops
Queue[Cont Mslots]	0/104, fifo queueing, 0 drops
Queue[CIR Grants]	0/20, fair queueing, 0 drops
Queue[BE Grants]	0/30, fair queueing, 0 drops
Queue[Grant Shpr]	0/30, calendar queueing, 0 drops
Reserved slot table currently has 2 CBR entries
Req IEs 280185, Req/Data IEs 0
Init Mtn IEs 800, Stn Mtn IEs 49
Long Grant IEs 26, Short Grant IEs 15
Avg upstream channel utilization :1%
Avg percent contention slots :97%
Avg percent initial ranging slots :1%
Avg percent minislots lost on late MAPs :0%
Total channel bw reserved 192000 bps
CIR admission control not enforced
Current minislot count :1165412		Flag:1
Scheduled minislot count :1176227		Flag:1

New items in the display include:

•Detailed slot queue statistics---Queue [CIR Grants] 0/20, fair queueing, 0 drops in the example above means that the queue for CIR-service grants has a current depth of 0, a maximum depth of 20. Weighted fair queueing shows grants in this queue.

•CBR slot scheduling table state---The above reserved slot table has 2 CBR entries. This shows that at the time the command was issued, the MAC scheduler had admitted 2 CBR slots in the reserved slot table.

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

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