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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
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Chapter4 Troubleshooting the System
Understanding Show Command Responses
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.
•CBRslot scheduling table state---The above reserved slot table has 2 CBR entries. This shows that
atthe time the command was issued, the MAC scheduler had admitted 2 CBR slots in the reserved
slot table.
Avg percent minislots lost on
late MAPs Indicateson average what percent of slots are lost because
a MAP interrupt was too late
Current minislot count
(formerly: Last Minislot Stamp
(current_time_base))
Indicates the current minislot count at the CMTS. FLAG
indicatesthe timebase reference. This field is used only by
developers.
Scheduled minislot count
(formerly: Last Minislot Stamp
(scheduler_time_base))
Indicates the furthest minislot count allocated at the
indicated time. FLAG indicates the timebase reference.
This field is used only by developers.
Table4-18 Show Interface Cable Upstream Command Field Descriptions (continued)
Field Description