ZyXEL Communications Prestige 2602R Series, Руководство пользователя

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Prestige 2602R Series User’s Guide
Chapter 18 Media Bandwidth Management Advanced Setup 209
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.
Apply Click Apply to save your changes back to the Prestige.
Cancel Click Cancel to begin configuring this screen afresh.
Table 61 Media Bandwidth Management: Class Configuration (continued)
LABEL DESCRIPTION