XE.C

XE is a program that displays the LINE counters for a DEUNA,DEQNA,
DELUA,DEBNA,DESVA or DELQA in a MONITOR type format. This is the
equivalent of a MONITOR version of "NCP SHO LINE xxxx COUNTERS".

Install by executing INSTALL.COM.

Syntax:
	$ XE [device] [/INTERVAL=5]

If no device is specified, XE searchs for (in order): NI$DEVICE,
ESA0:, XQA0:, ETA0: and XEA0:.
If you have several interfaces, or wish to use a particular device,
then specify a device parameter, eg.

	$ XE XQB0

Use CTRL/Z,CTRL/Y,CTRL/C to exit from XE.
Use CTRL/W to repaint the screen.
Use CTRL/R to cause the counters to be zeroed at the next scan.

Note that the time since last zeroed is a word counter (in seconds).
Therefore a maximum time of "0 18:12:15" can be displayed before the
counter stops.
When the time reaches its limit, XE will display a leading ">" before
the time, eg. ">18:12:15", to indicate that the counter has overflowed.
If the counter has reached its limit when you first enter XE, then
the initial calculated average rates will be inaccurate. Use CTRL/R to
reset the counters on the next scan.

If there are any receive failures (packets lost), XE will attempt to
determine the reasons for failure, a brief text will be displayed after
the "Received:" lable:

	Text		Meaning
	------		-------
	BlkChk		Block check error
	FrmErr		Framing error
	FrmLng		Frame too long

Similarly, if any send failures (resulting in packet loss) are detected,
text will be displayed after the "Transmitted:" lable:

	Text		Meaning
	------		-------
	ExcCol		Excessive collisions
	CarFail		Carrier check fail
	ShtCir		Short circuit
	OpnCir		Open circuit
	FrmLng		Frame too long
	RemDef		Remote failure to defer

Note also that only one instance of XE may be active at any one time.
This is because XE uses a non-shared protocol when talking to the driver.

The interface to [XE|XQ|ET|ES]DRIVER uses an undocumented SENSEMODE
modifier.

I have found this utility very useful for looking at ethernet traffic
during flood testing.

Known Problems
--------------
Looking at help confuses the average rate calcualtions for the scan
in progress when the HELP key was hit. The actual effect is that the
rates for the next scan will be increased (but only for the next scan).

Nick de Smith
Applied Telematics Group
7 Vale Avenue
Tunbridge Wells
Kent TN1 1DJ
England
+44 892 511000
PSI%234213300154::NICK