Troubleshooting guide

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Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
OL-5169-01
Chapter 7 Troubleshooting the CMTS
Troubleshooting the Cisco uBR7246VXR
Displaying Type of Service (ToS) Specifications
The following command displays ToS specifications:
uBR7200#show cable qos profile
Service Prio Max Guarantee Max Max tx TOS TOS Create B
class upstream upstream downstream burst mask value by priv
bandwidth bandwidth bandwidth enab
1 0 0 0 0 0 0x0 0x0 cmts(r) no
2 0 64000 0 1000000 0 0x0 0x0 cmts(r) no
3 0 1000 0 1000 0 0x0 0x0 cmts no
4 3 256000 0 512000 0 0x0 0x0 cm no
5 5 1000000 0 10000000 0 0x0 0x0 cm no
6 3 256000 0 512000 0 0x0 0x0 cm yes
Note: The “r” in the “Create by” column means the first two classes of service the Cisco uBR7246VXR
creates are reserved for cable modems that are not online.
Displaying Cable Interface Data
To display cable interface information, use the following command in privileged EXEC mode:
show interface cable slot/port [downstream | upstream] port
The following command displays output for a cable modem located in slot 3/port 0 with detailed MAC
scheduler state information for the upstream port:
router# show interface cable 3/0 upstream 0
Cable3/0: Upstream 0 is up
Received 16873 broadcasts, 0 multicasts, 73310 unicasts
0 discards, 89053 errors, 0 unknown protocol
90183 packets input, 1 uncorrectable
89042 noise, 0 microreflections
Total Modems On This Upstream Channel : 8 (4 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 0 CBR entries
Req IEs 134469315, Req/Data IEs 0
Init Mtn IEs 385879, Stn Mtn IEs 131059
Long Grant IEs 10766, Short Grant IEs 15895
Avg upstream channel utilization : 1%
Avg percent contention slots : 97%
Avg percent initial ranging slots : 0%
Avg percent minislots lost on late MAPs : 0%
Total channel bw reserved 0 bps
CIR admission control not enforced
Current minislot count : 6676390 Flag: 0
Scheduled minislot count : 6676545 Flag: 0