Cisco cBR 8 Configuration Guide

PurposeCommand or Action
slots. The limit option specifies the allowable jitter
limit in microseconds (0 to 4,294,967,295. The
Example:
Router(config-if)# cable upstream 0
cac-enforce option configures the upstream so that
it rejects service flows requesting jitter less than the
fragmentable slot jitter.
unfrag-slot-jitter limit 2000
cac-enforce
Router(config-if)#
By default, jitter is set to a limit of 0
microseconds, and the cac-enforce option
is enabled.
Note
Exits interface configuration mode.exit
Example:
Router(config-if)# exit
Router(config)#
Step 6
Exits global configuration mode.exit
Example:
Router(config)# exit
Router#
Step 7
The following example of the show cable qos profile command illustrates that the maximum downstream
burst has been defined, and is a management-created QoS profile:
Router# show cable qos profile
ID Prio Max Guarantee Max Max TOS TOS Create B IP prec.
upstream upstream downstream tx mask value by priv rate
bandwidth bandwidth bandwidth burst enab enab
1 0 0 0 0 0 0xFF 0x0 cmts(r) no no
2 0 64000 0 1000000 0 0xFF 0x0 cmts(r) no no
3 7 31200 31200 0 0 0xFF 0x0 cmts yes no
4 7 87200 87200 0 0 0xFF 0x0 cmts yes no
6 1 90000 0 90000 1522 0xFF 0x0 mgmt yes no
10 1 90000 0 90000 1522 0x1 0xA0 mgmt no no
50 0 0 0 96000 0 0xFF 0x0 mgmt no no
51 0 0 0 97000 0 0xFF 0x0 mgmt no no
The following example illustrates the maximum downstream burst size in sample QoS profile 10 with the
show cable qos profileverbose command in privileged EXEC mode:
Router# show cable qos profile 10 verbose
Profile Index 10
Name
Upstream Traffic Priority 1
Upstream Maximum Rate (bps) 90000
Upstream Guaranteed Rate (bps) 0
Unsolicited Grant Size (bytes) 0
Unsolicited Grant Interval (usecs) 0
Upstream Maximum Transmit Burst (bytes) 1522
Downstreamam Maximum Transmit Burst (bytes) 100000
IP Type of Service Overwrite Mask 0x1
IP Type of Service Overwrite Value 0xA0
Downstream Maximum Rate (bps) 90000
Created By mgmt
Baseline Privacy Enabled no
Cisco cBR Series Converged Broadband Routers Quality of Services Configuration Guide for Cisco IOS XE Fuji
16.7.x
59
DOCSIS 1.1 for the Cisco CMTS Routers
Enabling DOCSIS Fragmentation

Cisco cBR 8 Specifications

General

Brand	Cisco
Model	cBR 8
Category	Network Router
Language	English