Qos Profile Overview; Managing System Resources For Nodes And Queues; Qos Profiles - Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010 Configuration Manual

Chapter 15

QoS Profile Overview

QoS Profile Overview
Related Topics

Managing System Resources for Nodes and Queues

This chapter provides information for configuring an interface with QoS profiles on
E Series routers.
QoS topics are discussed in the following sections:
QoS Profile Overview on page 127
Managing System Resources for Nodes and Queues on page 127
Scaling Subscribers on the TFA ASIC with QoS on page 128
You create an interface hierarchy for QoS by configuring a QoS profile that specifies
queue profiles, drop profiles, statistics profiles, and scheduler profiles in combination
with interface types. A QoS profile specifies the queue, drop statistics gathering, and
scheduler configuration for a subtree of the interface hierarchy. The QoS profile
controls the way scheduler nodes, queues, and shadow nodes are bound to the
interfaces above its attachment point in the interface hierarchy.
You can attach a QoS profile to the interface at the base of the subtree hierarchy, an
ATM VP, or an S-VLAN. For example, a QoS profile attached to an ATM port specifies
queuing attributes for interfaces of all types that are stacked over the port.
Supported Interface Types for QoS Profiles on page 131
Configuring a QoS Profile on page 132
The type of ASIC that each line module uses determines the system resources for
nodes and queues.
Line modules with the EFA ASIC hardware provide 85,000 descriptors that are shared
between all nodes and queues. Each line module supports a maximum of 49,000
nodes or queues per line module.
Line modules with the FFA ASIC hardware provide 2000 level 1 nodes or queues and
64,000 level 2 nodes or queues. The ES2 4G LM provides 2000 level 1 nodes or
queues and 128,000 level 2 nodes or queues. The router implicitly creates the level
127
QoS Profile Overview