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User Guide for the Cisco Network Analysis Module (NAM) Traffic Analyzer, 5.0
OL-22617-01
Chapter 4 Capturing and Decoding Packet Data
Viewing Packet Decode Information
Tab l e 4-11 Custom Decode Filter Dialog Box
Field Description Usage Notes
Filter Name The name of the capture filter. Enter the name of the filter to be created.
Description The description of the capture filter. Enter a description of the filter.
Protocol The protocol to match with the packet. Choose a protocol from the list. (Select All to match all
packets regardless of protocol.)
Address
(MAC or IP)
Indicates whether to filter by MAC or IP
address.
Choose MAC to filter using the source/destination MAC
address of the packets.
Choose IP to filter using the source/destination addresses of
the packets.
Both Directions Indicates whether the filter is applied to traffic
in both directions.
If the source is host A and the destination is host B, enabling
both directions filters packets from A to B and B to A.
If the source is host A and the destination is not specified,
enabling both directions filters packets both to and from host
A.
Offset The offset (in bytes) from the Base where
packet data-matching begins.
Enter a decimal number.
Base The base from which the offset is calculated.
If you select absolute, the offset is calculated
from the absolute beginning of the packet (for
example, the beginning of the Ethernet
frame).
If you select protocol, the offset is calculated
from the beginning of the protocol portion of
the packet. If the packet does not contain the
protocol, the packet fails this match.
Choose absolute or a protocol.