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P-660R-F1 Series User’s Guide
141
C
HAPTER
10
Static Route
This chapter shows you how to configure static routes for your ZyXEL Device.
10.1
Static Route
Each remote node specifies only the network to which the gateway is directly connected, and the
ZyXEL Device has no knowledge of the networks beyond. For instance, the ZyXEL Device knows
about network N2 in the following figure through remote node Router 1. However, the ZyXEL Device
is unable to route a packet to network N3 because it doesn't know that there is a route through the
same remote node Router 1 (via gateway Router 2). The static routes are for you to tell the ZyXEL
Device about the networks beyond the remote nodes.
Figure 85
Example of Static Routing Topology
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Chapter 10 Static Route
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10.2
Configuring Static Route
Click
Advanced > Static Route
to open the
Static Route
screen.
Figure 86
Static Route
The following table describes the labels in this screen.
Table 53
Static Route
LABEL
DESCRIPTION
#
This is the number of an individual static route.
Active
Select the check box to activate this static route. Otherwise, clear the check box.
Name
This is the name that describes or identifies this route.
Destination
This parameter specifies the IP network address of the final destination. Routing is
always based on network number.
Gateway
This is the IP address of the gateway. The gateway is a router or switch on the
same network segment as the device's LAN or WAN port. The gateway helps
forward packets to their destinations.
Subnet Mask
This is the IP subnet mask.
Modify
Click the Edit icon to go to the screen where you can set up a static route on the
ZyXEL Device.
Click the Delete icon to remove a static route from the ZyXEL Device. A window
displays asking you to confirm that you want to delete the route.
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Chapter 10 Static Route
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143
10.2.1
Static Route Edit
Select a static route index number and click
Edit
. The screen shown next appears. Use this screen
to configure the required information for a static route.
Figure 87
Static Route Edit
The following table describes the labels in this screen.
Table 54
Static Route Edit
LABEL
DESCRIPTION
Active
This field allows you to activate/deactivate this static route.
Route Name
Enter the name of the IP static route. Leave this field blank to delete this static
route.
Destination IP
Address
This parameter specifies the IP network address of the final destination.
Routing is
always based on network number. If you need to specify a route to a single host,
use a subnet mask of 255.255.255.255 in the subnet mask field to force the
network number to be identical to the host ID.
IP Subnet Mask
Enter the IP subnet mask here.
Gateway Type
Use either
Gateway Address
or
Gateway Node
to configure a static route.
Gateway IP
Address
This field is available when you select
Gateway Address
from
Gateway Type
.
Enter the IP address of the gateway. The gateway is a router or switch on the same
network segment as the device's LAN or WAN port. The gateway helps forward
packets to their destinations.
Gateway Node
This field is available when you select
Gateway Node
from
Gateway Type
.
Select a remote node to set the static route. A remote note is a connection point
outside of the local area network. One example of a remote node is your
connection to your ISP.
Back
Click
Back
to return to the previous screen without saving.
Apply
Click
Apply
to save your changes back to the ZyXEL Device.
Cancel
Click
Cancel
to begin configuring this screen afresh.
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Page 145 / 268
P-660R-F1 Series User’s Guide
145
C
HAPTER
11
Quality Of Service
11.1
Overview
Use the QoS 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 bandwidth. QoS allows the ZyXEL Device to group and
prioritize application traffic and fine-tune network performance.
Without QoS, all traffic data are 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
applications such as video-on-demand.
The ZyXEL Device assigns each packet a priority and then queues the packet accordingly. Packets
assigned with a high priority are processed more quickly than those with low priorities 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 Voice over IP (VoIP) or Internet gaming, and those for which jitter alone is a problem
such as Internet radio or streaming video
.
11.1.1
What You Can Do in the QoS Screens
•
Use the
General
screen to enable QoS on the ZyXEL Device, decide allowable bandwidth using
QoS and configure priority mapping settings for traffic that does not match a custom class.
•
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.
•
Use the
Monitor
screen to view the ZyXEL Device’s QoS-related packet statistics.
11.1.2
What You Need to Know About QoS
QoS versus Cos
QoS is used to prioritize source-to-destination traffic flows. All packets in the same flow are given
the same priority. Class of Service (CoS) 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 Differentiated Services (DiffServ 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 Type of Service (ToS) field in the IP header.

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