Administrator Guide

Switch Feature Overview 93
For information about configuring DHCPv6 settings, see "DHCPv6 Server
and Relay Settings " on page 1425.
Quality of Service (QoS) Features
Differentiated Services (DiffServ)
The QoS Differentiated Services (DiffServ) feature allows traffic to be
classified into streams and given certain QoS treatment in accordance with
defined per-hop behaviors. Dell Networking N-Series switches support both
IPv4 and IPv6 packet classification.
For information about configuring DiffServ, see "Differentiated Services " on
page 1445.
Class Of Service (CoS)
The Class Of Service (CoS) queueing feature enables directly configuring
certain aspects of switch queuing. This provides the desired QoS behavior for
different types of network traffic when the complexities of DiffServ are not
required. CoS queue characteristics, such as minimum guaranteed
bandwidth and transmission rate shaping, are configurable at the queue (or
port) level.
For information about configuring CoS, see "Class-of-Service " on page 1473.
Auto Voice over IP (VoIP)
This feature provides ease of use for the user in setting up VoIP for IP phones
on a switch. This is accomplished by enabling a VoIP profile that a user can
select on a per port basis.
For information about configuring Auto VoIP, see "Auto VoIP " on page 1503.
This capability is not available on the N3000 Series switches when running
the AGGRAGATION ROUTER image.
NOTE: Some features that can affect QoS, such as ACLs and Voice VLAN, are
described in other sections within this chapter.