Endace Measurement Systems.
http://www.endace.com
EDM01.05-10r1 DAG 4.3S Card User Manual
27
Revision 6. 22 September 2005.
5.3 DAG Card Packet Transmission Capabilities
Description
The firmware included with the DAG 4.3S card allows the DAG to
transmit as well as receive packets, however the DAG does not appear as a
network interface to the operating system.
In this chapter
This chapter covers the following sections of information.
•
DAG Packet Transmission
•
Inline Forwarding
5.3.1 DAG Packet Transmission
Process
The following information describes the DAG capabilities of the DAG
firmware for the transmission and receiving of packets.
Process Description
Explicit packet
transmission.
The DAG will not respond to ARP, ping, or
router discovery protocols. It will only transmit
packets explicitly provided by the user.
This capability allows the DAG card to be used
as a simple traffic load generator.
The DAG can also be used to retransmit
previously recorded packet traces.
By default, the packet trace will be transmitted
at 100% line rate, the packet timing of the
original trace file is not reproduced.
Packet transmission
utility.
The
dagflood
utility can transmit ERF format
packet traces. The ERF trace file to be
transmitted must contain only ERF records of
the type matching the current link configuration.
The ERF records to be transmitted must all have
a length which is a multiple of 64-bits. When
capturing a packet trace for later transmission,
you can set 64-bit alignment using the
dagfour
align64
command.
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