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Page 186 / 424 Scroll up to view Page 181 - 185
Chapter 9 DNS Route
P-2612HNU-Fx User’s Guide
186
9.1.1
What You Can Do in this Chapter
The
DNS Route
screens let you view and configure DNS routes on the ZyXEL
Device (
Section 9.2 on page 186
).
9.2
The DNS Route Screen
The
DNS Route
screens let you view and configure DNS routes on the ZyXEL
Device. Click
Network Setting > DNS Route
to open the
DNS Route
screen.
Figure 68
Network Setting > DNS Route
The following table describes the labels in this screen.
Table 36
Network Setting > DNS Route
LABEL
DESCRIPTION
Add new DNS
route
Click this to create a new entry.
#
This is the number of an individual DNS route.
Status
This shows whether the DNS route is currently in use or not.
A yellow bulb signifies that this DNS route is in use. A gray bulb signifies
that this DNS route is not in use.
Domain Name
This is the domain name to which the DNS route applies.
WAN Interface
This is the WAN interface through which the matched DNS request is
routed.
Modify
Click the
Edit
icon to configure a DNS route on the ZyXEL Device.
Click the
Delete
icon to remove a DNS route from the ZyXEL Device.
Page 187 / 424
Chapter 9 DNS Route
P-2612HNU-Fx User’s Guide
187
9.2.1
Add/Edit DNS Route Edit
Click
Add new DNS route
in the
DNS Route
screen or the
Edit
icon next to an
existing DNS route. Use this screen to configure the required information for a
DNS route.
Figure 69
DNS Route: Add/Edit
The following table describes the labels in this screen.
Table 37
DNS Route: Add/Edit
LABEL
DESCRIPTION
Active
Select this to activate this DNS route.
Domain Name
Enter the domain name you want to resolve.
You can use the wildcard character, an “*” (asterisk) as the left most part
of a domain name, such as *.example.com. The ZyXEL Device forwards
DNS queries for any domain name ending in example.com to the WAN
interface specified in this route.
WAN Interface
Select a WAN interface through which the matched DNS query is sent.
You must have the WAN interface(s) already configured in the
Broadband
screen.
Apply
Click
Apply
to save your changes.
Back
Click
Back
to exit this screen without saving.
Page 188 / 424
Chapter 9 DNS Route
P-2612HNU-Fx User’s Guide
188
Page 189 / 424
P-2612HNU-Fx User’s Guide
189
C
HAPTER
10
Quality of Service (QoS)
10.1
Overview
This chapter discusses the ZyXEL Device’s
QoS
screens. Use these screens to set
up your ZyXEL Device to use QoS for traffic management.
Quality of Service (QoS) refers to both a network’s ability to deliver data with
minimum delay, and the networking methods used to control the use of
bandwidth. QoS allows the ZyXEL Device to group and prioritize application traffic
and fine-tune network performance.
Without QoS, all traffic data is equally likely to be dropped when the network is
congested. This can cause a reduction in network performance and make the
network inadequate for time-critical application such as video-on-demand.
The ZyXEL Device assigns each packet a priority and then queues the packet
accordingly. Packets assigned a high priority are processed more quickly than
those with low priority if there is congestion, allowing time-sensitive applications
to flow more smoothly. Time-sensitive applications include both those that require
a low level of latency (delay) and a low level of jitter (variations in delay) such as
Internet gaming, and those for which jitter alone is a problem such as Internet
radio or streaming video.
Note: The ZyXEL Device has built-in configurations for Voice over IP (IP). The Quality
of Service (QoS) feature does not affect VoIP traffic.
•
See
Section 10.6 on page 199
for advanced technical information on SIP.
10.1.1
What You Can Do in this Chapter
•
Use the
General
screen to enable QoS, set the bandwidth, and allow the ZyXEL
Device to automatically assign priority to upstream traffic according to the IEEE
802.1p priority level, IP precedence or packet length (
Section 10.2 on page
190
).
•
Use the
Queue Setup
screen to configure QoS queue assignment (
Section 10.3
on page 192
).
Page 190 / 424
Chapter 10 Quality of Service (QoS)
P-2612HNU-Fx User’s Guide
190
•
Use the
Class Setup
screen to set up classifiers to sort traffic into different
flows and assign priority and define actions to be performed for a classified
traffic flow (
Section 10.4 on page 194
).
•
Use the
Monitor
screen to view the ZyXEL Device’s QoS-related packet
statistics (
Section 10.5 on page 198
).
10.1.2
What You Need to Know
The following terms and concepts may help as you read this chapter.
QoS versus Cos
QoS is used to prioritize source-to-destination traffic flows. All packets in the same
flow are given the same priority. CoS (class of service) is a way of managing traffic
in a network by grouping similar types of traffic together and treating each type as
a class. You can use CoS to give different priorities to different packet types.
CoS technologies include IEEE 802.1p layer 2 tagging and DiffServ (Differentiated
Services or DS). IEEE 802.1p tagging makes use of three bits in the packet
header, while DiffServ is a new protocol and defines a new DS field, which replaces
the eight-bit ToS (Type of Service) field in the IP header.
Tagging and Marking
In a QoS class, you can configure whether to add or change the DSCP (DiffServ
Code Point) value, IEEE 802.1p priority level and VLAN ID number in a matched
packet. When the packet passes through a compatible network, the networking
device, such as a backbone switch, can provide specific treatment or service
based on the tag or marker.
10.2
The QoS General Screen
Use this screen to enable or disable QoS, set the bandwidth, and select to have
the ZyXEL Device automatically assign priority to upstream traffic according to the
IEEE 802.1p priority level, IP precedence or packet length.

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