Installation guide

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Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 5 Troubleshooting the System
Understanding Show Command Responses
Queue[CIR Grants] 0/20, fair queuing, 0 drops
Queue[BE Grants] 0/30, fair queuing, 0 drops
Queue[Grant Shpr] 0/30, calendar queuing, 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 queuing, 0 drops in the previous
example, meaning that the queue for CIR-service grants has a current depth of 0, and a maximum
depth of 20. Weighted fair queuing shows grants in this queue.
• CBR slot scheduling table state—The reserved slot table in the previous example 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.
• Counters for each type of upstream slot scheduled in the MAPs for this upstream channel—The “Init
Mtn IEs 800” means that the MAC scheduler has added 800 initial maintenance information
elements (slots) at the time the show command was issued.
• MAC scheduling statistics—Display what percentage of the upstream bandwidth is utilized for each
type of slot on an average.
show interface cable sid Command
To display per-SID counters for bandwidth requests, use the show interface cable privileged EXEC
command:
show interface cable interface sid [sid] counters verbose
Data transport over the RF link uses the registered SID address, rather than the Ethernet address. This
allows multiple hosts to access the network by using a single cable modem.
Note Use the verbose option to provide SID details.
See the following display output for the verbose keyword extension for SID 1:
Router# show interface c1/0 sid 1 counters verbose
Sid : 1
Input packets : 39
Input octets : 15964
Output packets : 30
Output octets : 8796
BW requests received : 40
Grants issued : 40
Rate exceeded BW request drops : 0
Rate exceeded DS packet drops : 0