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Cisco Broadband Cable Command Reference Guide
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Chapter 2 Cisco CMTS Configuration Commands
cable upstream admission-control
This displays also shows that the admission control is being enforced at a subscription level of 125
percent. The Virtual channel BW field is computed by multiplying channel bandwidth by the admission
control limit. The Admissions requests rejected counter shows the number of cable modems that
attempted to register but were refused because of the admission control policy.
Router#
show interface c3/0 u4
Cable3/0: Upstream 4 is up
Received 11585 broadcasts, 11854 multicasts, 3222651 unicasts
0 discards, 829 errors, 0 unknown protocol
3246090 packets input, 5 uncorrectable
557 noise, 0 microreflections
Total Modems On This Upstream Channel : 69 (68 active)
Default MAC scheduler
Queue[Rng Polls] 0/64, fifo queueing, 0 drops
Queue[Cont Mslots] 0/52, fifo queueing, 0 drops
Queue[CIR Grants] 0/64, fair queueing, 0 drops
Queue[BE Grants] 0/64, fair queueing, 0 drops
Queue[Grant Shpr] 0/64, calendar queueing, 0 drops
Reserved slot table currently has 0 CBR entries
Req IEs 205196036, Req/Data IEs 0
Init Mtn IEs 7604617, Stn Mtn IEs 422496
Long Grant IEs 4848, Short Grant IEs 1646196
Avg upstream channel utilization : 1%
Avg percent contention slots : 94%
Avg percent initial ranging slots : 1%
Avg percent minislots lost on late MAPs : 0%
Total channel bw reserved 2500000 bps
CIR admission control enforced
Subscribtion level 125%
Virtual channel bw 6400000 bps
Admission requests rejected 32
Current minislot count : 5200298 Flag: 0
Scheduled minislot count : 5200420 Flag: 0
Router#
If a CM is denied access due to the admission control policy, its entry in the
show cable modem
command output shows “reject(c)”:
Router#
show cable modem
Interface Prim Online Timing Rec QoS CPE IP address MAC address
Sid State Offset Power
Cable2/0/U0 1 online 2288 0.50 4 0 10.16.30.66 0010.7bb3.fb45
Cable2/0/U0 2 online 2288 0.50 4 0 10.16.30.68 0010.7bb3.fb7b
Cable2/0/U0 3 init(i) 2280 0.00 2 0 10.16.30.69 0010.9500.05e
. . .
Cable3/0/U1 113 online 3921 0.00 5 0 10.128.1.108 0030.9433.c38b
Cable3/0/U1 114 online 3920 0.25 6 0 10.128.1.87 0030.1976.6ebf
Cable3/0/U0 115 reject(c) 3922 0.25 2 0 10.128.1.75 0030.1976.703b
Cable3/0/U0 116 online 3919 0.75 5 0 10.128.1.57 0030.1976.6fa1
Related Commands
Command
Description
debug cable mac-scheduler
Displays information for the MAC layer’s scheduler and
admission control activities.
debug cable us-adm-ctrl
Displays debug messages for upstream admission control
activity.