
Using Traffic Filters
1-5
Site Manager also supports one to ten priority queues at the TCP level for DLSw
traffic. Refer to
Configuring DLSw Services
to learn about TCP-based protocol
prioritization for DLSw traffic.
What Do Traffic Filters Do?
You use inbound traffic filters primarily for security, to deflect certain traffic from
destination nodes in your network. You use outbound filters primarily to ensure
timely delivery of critical data.
Ensure Consistent Service
When a router treats all packets equally, there is no way to ensure consistent
network services to users who are working interactively. Bulk transfer
applications use too much of the available bandwidth and slow down interactive
response times. These problems are especially visible on low-speed WAN links.
Reduce Network Congestion
Both inbound and outbound traffic filters reduce network congestion by
minimizing the flow of unnecessary traffic over LAN and WAN segments.
Prioritize Important Traffic
You can use protocol prioritization to expedite traffic coming from a particular
source or going to a certain destination.
Reduce Loss of Critical Data
You can improve application response time and eliminate session timeouts by
implementing protocol prioritization.
Enhance Security
Inbound and outbound traffic filters are an integral part of a comprehensive
network security strategy. You can control access to individual stations, networks,
and network resources through predefined or user-defined filter criteria. You can
use outbound filters to drop completely (
clip
) any traffic you do not want leaving
the local network.
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