Setting Bandwidth-On-Demand; Setting Filters; Input Filters; Output Filters - Lucent Technologies PortMaster 4 Configuration Manual

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Setting Filters

Setting Bandwidth-on-Demand

The bandwidth-on-demand feature provides a way to specify a point at which the
PortMaster establishes an additional line to a location. You use the high_water
keyword to specify the number of bytes of network traffic that must be queued before
the PortMaster opens an additional connection. The PortMaster examines the queue
several times a minute to determine if the high-water mark has been reached.
If you set a very low threshold number, the PortMaster quickly opens the maximum
number of ports you specify for this location. When selecting a threshold, bear in mind
that interactive traffic from login users queues a relatively small number of bytes—only
several hundred—while network users doing file transfers can queue several thousand
bytes of traffic.
This high-water value is used only when the maximum number of ports is greater than
one. The default high-water mark is 0 (zero).
To set the high-water mark in bytes for a location, use the following command:
Command> set location Locname high_water Number
Setting Filters
You can attach input and output filters to each location. Filters must be defined in the
filter table before they can be added to the location table. For more information about
filters, see Chapter 8, "Configuring Filters." When a filter is changed, all ports in use by
the location must be reset to have the changes take effect.
Note – If a matching filter name is not found in the filter table, this command is not
effective and all traffic is permitted.

Input Filters

Input filters cause all packets received from the interface to be evaluated against the
filter rule set. Only packets allowed by the filter are accepted.
To set an input filter for a location, use the following command:
Command> set location Locname ifilter Filtername

Output Filters

Output filters cause all packets going out to the interface to be evaluated against the
filter rule set. Only packets allowed by the filter are passed out to the interface.
To set an output filter for a location, use the following command:
Command> set location Locname ofilter Filtername
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PortMaster 4 Configuration Guide

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