Endace Measurement Systems.
http://www.endace.com
EDM01.05-10r1 DAG 4.3S Card User Manual
29
Revision 6. 22 September 2005.
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.
