ZyXEL Communications P-2302R-P1 Series, Руководство пользователя, Страница: 161 / 294

P-2302R-P1 Series User’s Guide
Chapter 15 Bandwidth MGMT 161
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H A P T E R
15
Bandwidth MGMT
Use these screens to manage the amount of traffic the ZyXEL Device routes through each
interface.
15.1 Bandwidth Management Overview
Bandwidth management allows you to allocate an interface’s outgoing capacity to specific
types of traffic. It can also help you make sure that the ZyXEL Device forwards certain types
of traffic (especially real-time applications) with minimum delay. With the use of real-time
applications such as Voice-over-IP (VoIP) increasing, the requirement for bandwidth
allocation is also increasing.
Bandwidth management addresses questions such as:
• Who gets how much access to specific applications?
• What priority level should you give to each type of traffic?
• Which traffic must have guaranteed delivery?
• How much bandwidth should be allotted to guarantee delivery?
Bandwidth management also allows you to configure the allowed output for an interface to
match what the network can handle. This helps reduce delays and dropped packets at the next
routing device. For example, you can set the WAN interface speed to 1024 kbps (or less) if the
broadband device connected to the WAN port has an upstream speed of 1024 kbps.
15.1.1 Bandwidth Classes and Filters
Use bandwidth classes and sub-classes to allocate specific amounts of bandwidth capacity
(bandwidth budgets). Configure a bandwidth filter to define a bandwidth class (or sub-class)
based on a specific application and/or subnet. Use the
Bandwidth Class Setup Screen to set up
a bandwidth class’s name, bandwidth allotment, and bandwidth filter. You can configure up to
one bandwidth filter per bandwidth class. You can also configure bandwidth classes without
bandwidth filters. However, it is recommended that you configure sub-classes with filters for
any classes that you configure without filters. The ZyXEL Device leaves the bandwidth
budget allocated and unused for a class that does not have a filter or sub-classes with filters.
View your configured bandwidth classes and sub-classes in the
Bandwidth Class Setup
Screen .
The total of the configured bandwidth budgets for sub-classes cannot exceed the configured
bandwidth budget speed of the parent class.