Dell PowerConnect 2824 User Manual

Dell PowerConnect 28xx Systems User Guide 144
9
Configuring Quality of Service
This section provides information for defining and configuring Quality of Service (QoS) parameters.
To open the Quality of Service page, click Quality of Service in the tree view.
An implementation example that requires QoS includes certain types of traffic such as Voice, Video
and real-time traffic which can be assigned a high priority queue, while other traffic can be assigned
a lower priority queue. The result is an improved traffic flow for traffic with high demand.
QoS is defined by:
• Classification — Specifies which packet fields are matched to specific values. All packets
matching the user-defined specifications are classified together.
•
Action — Defines traffic management where packets being forwarded are based on packet
information, and packet field values such as VLAN priority (VPT) and DSCP (DiffServ Code
Point).
VPT Tag Classification Information
VLAN Priority Tags are used to classify the packets by mapping packets to one of the output queues.
VLAN Priority Tag to queue assignments are user-definable. The table below details the VPT to
queue default settings:
Packets arriving untagged are assigned a default VPT that is set on a per port basis. The assigned
VPT is used to map the packet to the output queue and as the egress VPT.
Table 9-1. CoS to Queue Mapping Table Default values
CoS Value Forwarding Queue Values
0q
1q1
2q1
3q
4q
5q
6q
7q

Dell PowerConnect 2824 Specifications

General

Throughput	35.6 Mpps
MAC address table	8000 entries
Jumbo frames support	Yes
Maximum data transfer rate	1 Gbit/s
Supported data transfer rates	10/100/1000 Mbps
10G support	No
Number of VLANs	64
Networking standards	IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1v, IEEE 802.1W, IEEE 802.1X, IEEE 802.3ac, IEEE 802.3ad, IEEE 802.3x
Dimensions (WxDxH)	330 x 230.5 x 42 mm
Power requirements	100 V
Networking features	Gigabit Ethernet
Connectivity technology	Wired
Dimensions (W x D x H) (imperial)	13 x 9.1 x 1.65 \
DHCP features	DHCP server, DHCP client
Switch type	Unmanaged
Switch layer	-
Data link protocols	Ethernet
Supported network protocols	IGMPv2, GARP, GVRP, GMP, IPv6
Power connector	DC-in jack
SFP/SFP+ slots quantity	2
Basic switching RJ-45 Ethernet ports quantity	24
Product color	Black
Input current	1 A
Heat dissipation	95.5 BTU/h
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	0 - 45 °C
Storage relative humidity (H-H)	10 - 95 %
Operating relative humidity (H-H)	10 - 90 %

Weight and Dimensions

Weight	2500 g