Asante Technologies 8000 사용자 설명서

Page B-3

Implementors may wish to consider selecting the ShortEventMaxTime 
towards the lower end of the allowed tolerance range to accommodate bit 
losses suffered through physical channel devices not budgeted for within this 
standard.

The approximate minimum time for rollover of this counter is 16 hours."

Reference: IEEE 802.3 Rptr Mgt, 19.2.6.2, aShortEvents

"This counter is incremented by one for each CarrierEvent on this port that 
meets one of the following two conditions.  Only one test need be made.  

a) The ActivityDuration is greater than ShortEventMaxTime and less than 
ValidPacketMinTime and the CollisionEvent signal is deasserted.  

b) The OctetCount is less than 64, the ActivityDuration is greater than 
ShortEventMaxTime and the CollisionEvent signal is deasserted. 
ValidPacketMinTime is greater than or equal to 552 bit times and less than 
565 bit times.

An event whose length is greater than 74 bit times but less than 82 bit times 
shall increment either the shortEvents counter or the runts counter but not 
both.  A CarrierEvent greater than or equal to 552 bit times but less than 565 
bit times may or may not be counted as a runt.

ValidPacketMinTime has tolerances included to provide for circuit losses 
between a conformance test point at the AUI and the measurement point 
within the state machine.

Runts usually indicate collision fragments, a normal network event.  In 
certain situations associated with large diameter networks a percentage of 
collision fragments may exceed ValidPacketMinTime.

The approximate minimum time for rollover of this counter is 16 hours."

Reference: IEEE 802.3 Rptr Mgt, 19.2.6.2, aRunts

"This counter is incremented by one for any CarrierEvent signal on any port 
for which the CollisionEvent signal on this port is also asserted.

The approximate minimum time for rollover of this counter is 16 hours."

Reference: IEEE 802.3 Rptr Mgt, 19.2.6.2, aCollisions