Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010, Configuration Manual

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Chapter 20
Configuring QoS for Gigabit Ethernet
Interfaces and VLAN Subinterfaces
This chapter provides information for configuring QoS for Gigabit Ethernet interfaces
and VLAN subinterfaces.
QoS topics are discussed in the following sections:
■
Providing QoS for Ethernet Overview on page 177
■
QoS Shaping Mode for Ethernet Interfaces Overview on page 178
■
Configuring the QoS Shaping Mode for Ethernet Interfaces on page 179
■
Creating a QoS Interface Hierarchy for Bulk-Configured VLAN Subinterfaces with
RADIUS on page 180
■
Monitoring QoS Configurations for Ethernet on page 182
Providing QoS for Ethernet Overview
Managing the bandwidth of downstream ATM traffic to Ethernet interfaces is difficult
because of different layer 2 encapsulations and the ATM cell pad, trailer, and header.
The SAR scheduler is not available for Ethernet interfaces. However, you can still
configure the operational shaping mode to shape downstream ATM traffic based on
either frames or cells. Configuring cell-based shaping enables you to reduce packet
drops in the Ethernet network by adjusting shaping for the ATM cell pad, trailer, and
header.
You can also use RADIUS to provide QoS on bulk-configured VLAN subinterfaces.
Related Topics
QoS Shaping Mode for Ethernet Interfaces Overview on page 178
■
■
Creating a QoS Interface Hierarchy for Bulk-Configured VLAN Subinterfaces with
RADIUS on page 180
■
To configure subscriber-based QoS for 802.3ad link aggregation interfaces, see
QoS for 802.3ad Link Aggregation Interfaces Overview on page 183
Providing QoS for Ethernet Overview
■ 177