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Implementation Profile
About NDIS Mode
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About NDIS Mode
Surveyor in NDIS mode uses an NDIS driver and interfaces to a variety of network
adapters. All basic capture, transmit, and monitor functions are the same in NDIS
mode. However, it is not recommended that an NDIS module be used to transmit
packets; the transmit rate is likely to fall below the specified transmission rate and
transmission of error packets is not supported.
The unique capabilities in the software interface due to using an NDIS driver are
described below:
Captured Packets
Since the NDIS interface filters out frames with errors, only “good” Ethernet frames
are captured. In addition, Surveyor in NDIS mode captures both frames received by
the Ethernet adapter as well as frames transmitted by the Ethernet adapter.
Capture Rate / Transmit Speed
Capture/transmit rates depend on the network adapter and the CPU. Typically, the
rate will fall below the full line-rate of the network.
Counters
The error counters supported through the NDIS interface are those counters sup-
ported by the network adapter. Some vendors do not support any error counters.
Only supported error counters are incremented and shown within data views.
Rx Counter Display
Counters not supported by the NDIS module will display with an “N/A” next to the
counter.
Transmit Specification
Transmission of error packets is not supported.
The minimum and maximum values for the
Packet Size field are 64 and 1518 bytes.
The radio button for setting the packet gap in microseconds is grayed. Packet gaps
in microseconds are not supported.
Entering a zero in the
Packet Gap field forces the shortest gap possible.