CANOGA PERKINS 9145E Standard NID Software Version 1.0 - Manual (Page 69)

Port Information 9145E NID Software User’s Manual
Layer 2 Statistics
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5.3.2 Counter Controls
Use the controls as listed to view the Layer 2 Statistics screen. Press Esc to return to the Port
Information screen.
Change Counter Frame Size - The 9145E has a programmable counter for frames greater than the
programmed size. Type C and press Enter. Type in the desired frame size, between 64 and 10,000,
and press Enter to accept change.
Error Counters - Type E and press Enter to view the Layer 2 Error Statistics screen (Figure 5-13).
Frame Type Counters - Type T and press Enter to view the Layer 2 Frame Type Statistics screen
(Figure 5-14).
Raw Counters - These are the total counters since the last time the 9145E was reset. Press Ctrl+T to
view raw layer 2 statistics.
Reset Counters - Press Ctrl+R to reset the counters. The counters are reset independently of the
raw counters. The raw counters can not be cleared.
Frame Counters - Press F (available on Layer 2 Error Statistics and Layer 2 Frame Type Statistics
menus) to return to the Layer 2 Statistics screen.
5.3.3 Layer 2 Counter Definitions
The following are definitions of the counters encountered on the Layer 2 Error Statistics screen
(Figure 5-13) and Layer 2 Frame Type Statistics screens (Figure 5-14).
5.3.3.1 Layer 2 Error Statistics Screen
Frames Sent - reports the total number of frames sent from the interface since the last reset
(Raw) or the last counter reset (Current).
Frames Rcvd - reports the total number of valid frames received on the interface since the last
reset (Raw) or the last counter reset (Current).
Collisions - reports the number of collisions that the interface encountered when attempting to
transmit a frame over a half duplex connection.
Late Collisions - reports the number of collisions that the interface encountered later than 512 bit-
times into the frame when attempting to transmit a frame over a half duplex connection.
Alignment Errors - reports the number of frames received on the interface that had a non-integral
number of octets and a bad CRC. The interface will discard the frame.
Undersize < 64 - reports the number of frames received on the interface that were less than 64
bytes in length (excluding framing bits, but including the CRC), and were otherwise well formed.
The interface will discard the frame.
Oversize > MaxFrameSize- reports the number of frames received on the interface that had a
length (excluding framing bits, but including the CRC) greater than the Maximum Frame Size set
for the unit, inclusive.
See the Functional Configuration screen for information on how to set the Maximum Frame Size.
The interface will discard the frame.
Fragments - reports the number of frames received on the interface that were not an integral
number of bytes in length or that had a bad CRC, and were less than 64 bytes in length (excluding
framing bits but including the CRC). The interface will discard the frame.