ZyXEL ADSL Prestige 660HW-61 91-004-361001 Benutzerhandbuch

Prestige 660H/HW Series User’s Guide

Chapter 18 Media Bandwidth Management Advanced Setup

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Borrow bandwidth 

from parent class 

Select this option to allow a child-class to borrow bandwidth from its parent class 

if the parent class is not using up its bandwidth budget. 
Bandwidth borrowing is governed by the priority of the child-classes. That is, a 

child-class with the highest priority (7) is the first to borrow bandwidth from its 

parent class. 
Do not select this for the classes directly below the root class if you want to leave 

bandwidth available for other traffic types or you want to set the interface’s 

speed to match what the next device in network can handle (see the Speed field 

description in the Summary screen).

Bandwidth Filter
The Prestige uses a bandwidth filter to identify the traffic that belongs to a bandwidth class.

Active

Select the check box to have the Prestige use this bandwidth filter when it 

performs bandwidth management. 

Service

You can select a predefined service instead of configuring the Destination Port, 

Source Port and Protocol ID fields. 
SIP (Session Initiation Protocol) is a signaling protocol used in Internet 

telephony, instant messaging and other VoIP (Voice over IP) applications. Select 

SIP from the drop-down list box to configure this bandwidth filter for traffic that 

uses SIP. 
File Transfer Protocol (FTP) is an Internet file transfer service that operates on 

the Internet and over TCP/IP networks. A system running the FTP server 

accepts commands from a system running an FTP client. The service allows 

users to send commands to the server for uploading and downloading files. 

Select FTP from the drop-down list box to configure this bandwidth filter for FTP 

traffic. 
H.323 is a standard teleconferencing protocol suite that provides audio, data and 

video conferencing. It allows for real-time point-to-point and multipoint 

communication between client computers over a packet-based network that 

does not provide a guaranteed quality of service. Select H.323 from the drop-

down list box to configure this bandwidth filter for traffic that uses H.323. 
When you select None, the bandwidth class applies to all services unless you 

specify one by configuring the Destination Port, Source Port and Protocol ID 

fields. 

Destination IP 

Address

Enter the destination IP address in dotted decimal notation. A blank destination 

IP address means any destination IP address.

Destination Subnet 

Mask 

Enter the destination subnet mask. This field is N/A if you do not specify a 

Destination IP Address. Refer to the appendix for more information on IP 

subnetting.

Destination Port 

Enter the port number of the destination. A blank destination port means any 

destination port.

Source IP Address 

Enter the source IP address. A blank source IP address means any source IP 

address.

Source Subnet 

Mask 

Enter the source subnet mask. This field is N/A if you do not specify a Source IP 

Address. Refer to the appendix for more information on IP subnetting.

Source Port

Enter the port number of the source. See the following table for some common 

services and port numbers. A blank source port means any source port number.

Protocol ID 

Enter the protocol ID (service type) number, for example: 1 for ICMP, 6 for TCP 

or 17 for UDP. A blank protocol ID means any protocol number.

Back

Click Back to go to the main Media Bandwidth Management screen.

Table 60   Media Bandwidth Management: Class Configuration (continued)