Endace DAG 3.7G Series, Руководство пользователя

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EDM01-07: DAG 3.7G Card User Guide
Version 7: May 2006 4 ©2005
NIC Functionality
The DAG 3.7G series card have two 10/100/1000 Mbps Copper Ethernet
There default configuration is as if the DAG card was a NIC, and can be
connected to a hub, switch or router port directly.
Each DAG 3.7G port can also be connected to a NIC card. The DAG 3.7G
cards support automatic MDI/MDI-X switching, so can be connected to a
NIC using either an Ethernet straight-through or cross-over cable. When
using the failsafe feature of the DAG 3.7GF, there are some advantages to
using a straight through cable rather than a cross-over one. The DAG card
captures all packets received on each port, similar to a NIC in promiscuous
mode.
Memory Holes
Memory hole configuration is dependant on the application requirements. For
a receive-only configuration, two memory holes are available, on each port.
For packet forwarding applications, only one memory hole can be utilised.
Failsafe Relays
The DAG 3.7GF card failsafe relays are capable of either:
•
Connecting the two ports together as a pass-through link
•
Connecting both ports to the FPGA to enable data capture. This feature
is not available on 3.7GP cards.