Endace DAG 4.3GE, Руководство пользователя

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Endace Measurement Systems Ltd EDM01.05-01r1 DAG 4.3GE Card User Manual
www.endace.com
5.3.1 DAG Packet Transmission
, continued
Process (continued)
Process Description
Configuring DAG card
for transmission. To configure a DAG card for transmission,
some memory must be allocated to a transmit
stream.
In the
dagfour
output,
buf=nMB
indicates that
n
megabytes of memory has been allocated to this
DAG card in total. This memory can be split
between the available receive and transmit
stream buffers. The memory allocation is
displayed with
mem=X:Y
, where X is the amount
of memory allocated to receive stream 0 in MB,
and Y is the amount of memory allocated to
transmit stream 1 in MB.
By default the memory is evenly split between
the receive streams, the transmit streams have
no memory allocated.
If the card is to be used only for transmit, the
dagfour txonly
option can be used to recover
the receive buffer memory and assign all the
memory to transmit.
If the card is to be used for both transmitting
and receiving, the
rxtx
option can be used.
This allocates 16MB of memory to each
transmit stream, and divides the remaining
memory between the receive streams.
Alternatively the memory allocation can be
directly set with
mem=X:Y
option.
The stream buffer memory allocation can only
be changed when no packet capture or
transmission programs are running.
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Revision 6. 22 September 2005.