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Page 151 / 292 Scroll up to view Page 146 - 150
NBG-419N User’s Guide
151
C
HAPTER
21
Bandwidth Management
21.1
Overview
This chapter contains information about configuring bandwidth management and editing rules.
ZyXEL’s Bandwidth Management allows you to specify bandwidth management rules based on an
application.
In the figure below, uplink traffic goes from the LAN device (
A
) to the WAN device (
B
). Bandwidth
management is applied before sending the packets out to the WAN. Downlink traffic comes back
from the WAN device (
B
)
to the LAN device (
A
). Bandwidth management is applied before sending
the traffic out to LAN.
Figure 105
Bandwidth Management Example
You can allocate specific amounts of bandwidth capacity (bandwidth budgets) to individual
applications (like VoIP, Web, FTP, and E-mail for example).
21.2
What You Can Do
•
Use the
General
screen (
Section 21.4 on page 152
) to enable bandwidth management and
assign bandwidth values.
•
Use the
Advanced
screen (
Section 21.5 on page 152
) to configure bandwidth managements rule
for the pre-defined services and applications.
•
Use the
Monitor
screen (
Section 21.6 on page 157
) to view the amount of network bandwidth
that applications running in the network are using.
A
B
-> VOIP
-> FTP
-> HTTP
-> Chat, Email
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Chapter 21 Bandwidth Management
NBG-419N User’s Guide
152
21.3
What You Need To Know
The sum of the bandwidth allotments that apply to the WAN interface (LAN to WAN, WLAN to WAN)
must be less than or equal to the
Upstream Bandwidth
that you configure in the
Bandwidth
Management
Advanced
screen (
Section 21.5 on page 152
).
The sum of the bandwidth allotments that apply to the LAN interface (WAN to LAN, WAN to WLAN)
must be less than or equal to the
Downstream Bandwidth
that you configure in the
Bandwidth
Management
Advanced
screen
Section 21.5 on page 152
.
21.4
General Screen
Use this screen to have the NBG-419N apply bandwidth management.
Click
Management
> Bandwidth MGMT
to open the bandwidth management
General
screen.
Figure 106
Management > Bandwidth Management > General
The following table describes the labels in this screen.
21.5
Advanced Screen
Use this screen to configure bandwidth management rules for the pre-defined services or
applications.
You can also use this screen to configure bandwidth management rule for other services or
applications that are not on the pre-defined list of NBG-419N. Additionally, you can define the
source and destination IP addresses and port for a service or application.
Table 66
Management > Bandwidth Management > General
LABEL
DESCRIPTION
Enable Bandwidth
Management
This field allows you to have NBG-419N apply bandwidth management.
Enable bandwidth management to give traffic that matches a bandwidth rule
priority over traffic that does not match a bandwidth rule.
Enabling bandwidth management also allows you to control the maximum or
minimum amounts of bandwidth that can be used by traffic that matches a
bandwidth rule.
Apply
Click
Apply
to save your customized settings.
Reset
Click
Reset
to begin configuring this screen afresh.
Page 153 / 292
Chapter 21 Bandwidth Management
NBG-419N User’s Guide
153
Note: The two tables shown in this screen can be configured and applied at the same
time.
Click
Management
>
Bandwidth Management
>
Advanced
to open the bandwidth
management
Advanced
screen.
Figure 107
Management > Bandwidth Management > Advanced
The following table describes the labels in this screen.
Table 67
Management > Bandwidth Management > Advanced
LABEL
DESCRIPTION
Management Bandwidth
Upstream
Bandwidth
Select the total amount of bandwidth (from 64 Kilobits to 32 Megabits) that you
want to dedicate to uplink traffic.
This is traffic from LAN/WLAN to WAN.
Downstream
Bandwidth
Select the total amount of bandwidth (from 64 Kilobits to 32 Megabits) that you
want to dedicate to uplink traffic.
This is traffic from WAN to LAN/WLAN.
Page 154 / 292
Chapter 21 Bandwidth Management
NBG-419N User’s Guide
154
Application List
Use this table to allocate specific amounts of bandwidth based on a pre-defined
service.
#
This is the number of an individual bandwidth management rule.
Priority
Select a priority from the drop down list box. Choose
High
,
Mid
or
Low
.
•
High
- Select this for voice traffic or video that is especially sensitive to jitter
(jitter is the variations in delay).
•
Mid
- Select this for "excellent effort" or better than best effort and would
include important business traffic that can tolerate some delay.
•
Low
- Select this for non-critical "background" traffic such as bulk transfers
that are allowed but that should not affect other applications and users.
Category
This is the category where a service belongs.
Service
This is the name of the service.
Select the check box to have the NBG-419N apply this bandwidth management
rule.
Advanced Setting
Click the
Edit
icon to open the
Rule Configuration
screen where you can
modify the rule.
User-defined
Service
Use this table to allocate specific amounts of bandwidth to specific applications
or services you specify.
#
This is the number of an individual bandwidth management rule.
Enable
Select this check box to have the NBG-419N apply this bandwidth management
rule.
Direction
Select
LAN
to apply bandwidth management to traffic from WAN to LAN.
Select
WAN
to apply bandwidth management to traffic from LAN/WLAN to WAN.
Select
WLAN
to apply bandwidth management to traffic from WAN to WLAN.
Service Name
Enter a descriptive name for the bandwidth management rule.
Category
This is the category where a service belongs.
Modify
Click the
Edit
icon to open the
Rule Configuration
screen. Modify an existing
rule or create a new rule in the
Rule Configuration
screen. See
Section 21.5.2
on page 156
for more information.
Click the
Remove
icon to delete a rule.
Apply
Click
Apply
to save your customized settings.
Reset
Click
Reset
to begin configuring this screen afresh.
Table 67
Management > Bandwidth Management > Advanced
(continued)
LABEL
DESCRIPTION
Page 155 / 292
Chapter 21 Bandwidth Management
NBG-419N User’s Guide
155
21.5.1
Rule Configuration: Application Rule Configuration
If you want to edit a bandwidth management rule for a pre-defined service or application, click the
Edit
icon in the
Application List
table of the
Advanced
screen. The following screen displays.
Figure 108
Bandwidth Management Rule Configuration: Application List
The following table describes the labels in this screen.
Table 68
Bandwidth Management Rule Configuration: Application List
LABEL
DESCRIPTION
#
This is the number of an individual bandwidth management rule.
Enable
Select an interface’s check box to enable bandwidth management on that
interface.
Direction
These read-only labels represent the physical interfaces. Bandwidth
management applies to all traffic flowing out of the router through the interface,
regardless of the traffic’s source.
Traffic redirect or IP alias may cause LAN-to-LAN traffic to pass through the
NBG-419N and be managed by bandwidth management.
Bandwidth
Select
Maximum Bandwidth
or
Minimum Bandwidth
and specify the
maximum or minimum bandwidth allowed for the rule in kilobits per second.
Destination Port
This is the port number of the destination that define the traffic type, for
example TCP port 80 defines web traffic.
See
Appendix E on page 259
for some common services and port numbers.
Source Port
This is the port number of the source
that define the traffic type, for example
TCP port 80 defines web traffic.
See
Appendix E on page 259
for some common services and port numbers.
Protocol
This is the protocol (
TCP
,
UDP
or user-defined) used for the service.
Apply
Click
Apply
to save your customized settings.
Cancel
Click
Cancel
to exit this screen without saving.

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