ZyXEL Communications 10 User Manual page 331

FIELD
BW Budget (kbps)
Priority
Borrow bandwidth
from parent class
Enable Bandwidth
Filter
Destination Address
Subnet Mask
Destination Port
Source Address
Subnet Mask
Source Port
Protocol ID
Click Apply to save your changes back to the ZyWALL. Click Reset to begin configuring this screen afresh.
Bandwidth Management
Table 25-4 Bandwidth Manager: Class Configuration
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.
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.
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 25.6.1) 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 25-2).
Select Enable Bandwidth Filter to have the ZyWALL use this bandwidth filter when
it performs bandwidth management.
You must enter a value in at least one of the following fields (other than the Subnet
Mask fields which are only available when you enter the destination or source IP
address).
Enter the destination IP address in dotted decimal notation.
Enter the destination subnet mask. This field is N/A if you do not specify a
Destination Address. Refer to the appendices for more information on IP
subnetting.
Enter the port number of the destination. See the chapter on creating custom firewall
rules for a table of services and port numbers.
Enter the source IP address.
Enter the source subnet mask. This field is N/A if you do not specify a Source
Address. Refer to the appendices for more information on IP subnetting.
Enter the port number of the source. See the following table for some common
services and port numbers.
Enter the protocol ID (service type) number, for example: 1 for ICMP, 6 for TCP or
17 for UDP.
ZyWALL 10~100 Series Internet Security Gateway
DESCRIPTION
25-15