Queueing And Scheduling Of Hierarchical Queues - Cisco Catalyst 3750 Software Configuration Manual

Metro switch

Hide thumbs Also See for Catalyst 3750:

Table of Contents

Understanding Hierarchical QoS

Queueing and Scheduling of Hierarchical Queues

Figure 26-11

Figure 26-11 Egress Queueing and Scheduling Flowchart for a Hierarchical Queue

Read QoS label (DSCP,

Determine egress queue

and thresholds based on

the label, VLAN ID, or both.

CBWFQ, LLQ, or both.

Rewrite any or all DSCP,

CoS bits as appropriate.

Catalyst 3750 Metro Switch Software Configuration Guide

shows the egress queueing and scheduling flowchart for a hierarchical queue.

Receive packet from

egress queue-set

and scheduling.

CoS, IP precedence,

or MPLS EXP bits).

Are thresholds

being exceeded?

Queue the packet.

Service the queue

according to the

IP precedence,

MPLS EXP, and

Send the packet

out the ES port.

Drop packet.

Configuring QoS