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Configuring Traffic Filters and Protocol Prioritization
1-6 117348-A Rev. A
Traffic Filter Components
The Configuration Manager creates traffic filters from template files that contain
filtering information. Traffic filter templates consist of three components:
Criteria
The portion of the incoming packet, frame, or datagram header to be
examined
Ranges
Numeric values (often addresses) to be compared with the contents of
examined packets
Actions
What happens to packets that match the criteria and ranges specified in a filter
To create a traffic filter, you apply a filter template to a particular router interface.
T
able 1-5 (at the end of this chapter) summarizes the inbound and outbound traffic
filter criteria and actions supported on specific interfaces.
Criteria
A filter criterion is the portion of a packet, frame, or datagram header to be
examined. You can break down any packet into at least three components:
The DLC (or data link) header. Examples of data link header types include:
-- Token ring (802.5)
-- Ethernet V.2 and IEEE 802.3
-- FDDI
-- PPP and Bay Networks Standard
-- Frame Relay
The upper-level protocol header. Examples of protocol header types include:
-- IP and TCP
-- Source route bridging (SRB)
-- DLSw
User data
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