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Prestige 660H Series User’s Guide 

18-10 Bandwidth 

Management 

Class Name 

Use the auto-generated name or enter a descriptive name of up to 20 alphanumeric 
characters, including spaces. 

BW Budget (kbps) 

Specify the maximum bandwidth allowed for the class in kbps. The recommendation is 
a setting between 20 kbps and 20000 kbps for an individual class.  

Priority 

Enter a number between 0 and 7 to set the priority of this class. The higher the 
number, the higher the priority. The default setting is 3. 

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 (see section 18.6.1) 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 Table 18-9). 

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. At the time 
of writing, SIP was the only predefined service. 

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. 

TOS (Type of 
Service) 

TOS defines the DS(Differentiated Service) field in the IP header.  

Enter the new TOS value of the outgoing packet (between 0 and 255). 0 is the lowest 
priority.