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Chapter 1
Using Traffic Filters
To help you understand and plan for traffic filter configurations on Bay Networks
routers, this chapter describes
• Types of traffic filters
• Uses for traffic filters
• Strategies for filtering
• Components of traffic filters
• Filter templates
What Are Traffic Filters?
Traffic filters are configuration files that enable an interface to selectively handle
specified network traffic (packets, frames, or datagrams). Using traffic filters, you
can instruct a router to block, forward, log, or prioritize certain traffic.
You determine which packets receive special handling based on information fields
within the headers of supported protocols. You can apply as many as 31 traffic
filters to a single interface. The order of filters determines the final filtering result.
The Configuration Manager supports two types of traffic filters:
•
Inbound traffic filters
, which act on packets coming
in to the router
•
Outbound
traffic filters
, which act on packets that the router is forwarding
Note:
Be careful not to confuse traffic filters with other router filters such as
route filters
, which force filtered routed protocol traffic to take particular
routes.
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