Long Custom Filter Example; Filtering Problem - 3Com 4007 Implementation Manual

Long Custom Filter
Example

Filtering Problem

Loading groups — The Administration Console has no explicit menu
item for loading port groups that are defined in a file on a remote
host. However, you can load groups by creating a script on a remote
host (which includes your port group) and then running that script on
your Administration Console host.
The following example shows a script that builds two port groups: one
named Mktg and the other named Sales:
bridge packetFilter portGroup create
15
Mktg
1,2,3
bridge packetFilter portGroup create
32
Sales
5,6
When you run the script, your groups are automatically created and
stored on the system.
The following solution shows a complex packet filter built from three
simple packet filters. Each of the shorter, simpler packet filters can be
used on its own to accomplish its own task. Combined, these filters
create a solution for a larger filtering problem.
Your network contains market data feed servers that receive time-critical
financial data needed for trading floor applications. At the center of the
trading floor networks is a system that is being used to switch Ethernet
traffic and to concentrate the market data feed servers onto the FDDI
departmental backbone.
The difficulty is that the market data feed servers transmit data to users
with broadcast packets that are forwarded to all stations on all segments
attached to the system. Not all of the segments attached to the system
have stations that require these broadcast updates. To optimize the
performance of these Ethernet segments, you need to filter the
broadcasts.

Long Custom Filter Example

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