Configuring Mqc Hierarchical Queuing With 3-Level Scheduler; Configuration Examples For Mqc Hierarchical Queuing With 3-Level Scheduler; Bandwidth Allocation—Policy Attached To An Interface: Example - Cisco 10000 Series Configuration Manual

MQC Hierarchical Queuing with 3-Level Scheduler
The VLAN rate is at most 1 to 2 MTUs of nonpriority traffic in front of priority traffic, which would
Note
bound the latency incurred by priority traffic (due to nonpriority traffic) at 1 to 2 MTUs served at the 10
GE rate.
The priority traffic of one logical interface cannot only impose burstiness on other traffic, but also starve
other traffic. The only way to prevent the starvation of other traffic is by configuring a policer on the
priority queue by limiting the percent of priority traffic to less than 90 percent of the parent bandwidth
and the port bandwidth.

Configuring MQC Hierarchical Queuing with 3-Level Scheduler

To configure the 3-level scheduler by allocating excess bandwidth, use the bandwidth remaining ratio
command. For more information, see the
on page

Configuration Examples for MQC Hierarchical Queuing with 3-Level Scheduler

This section provides the following configuration examples:
•
•
Bandwidth Allocation—Policy Attached to an Interface: Example
The following sample configuration consists of one policy map named Child with the following traffic
classes defined: prec0, prec2, and class-default. The policy is attached to ATM interface 1/0/0.
policy-map Child
!
interface atm 1/0/0
Assuming that the traffic flow through each class is enough to require maximum possible bandwidth, the
3-level scheduler allocates bandwidth as described in
Table 22-2
Traffic Class
prec0
prec2
class-default
Cisco 10000 Series Router Quality of Service Configuration Guide
22-8
5-14.
Bandwidth Allocation—Policy Attached to an Interface: Example, page 22-8
Tuning the Bandwidth-Remaining Ratio: Example, page 22-9
class prec0
bandwidth 300
class prec2
bandwidth 100
class class-default
bandwidth 50
service-policy output Child
Queuing Presentation—Policy Attached to an Interface
Bandwidth Ratio
6
2
1
Chapter 22
"Distribution of Remaining Bandwidth Using Ratio" section
Table 22-2.
Total Bandwidth Allocated
666 kbps
222 kbps
111 kbps
Hierarchical Scheduling and Queuing
OL-7433-09