Hirschmann BAT 11b, Management Manual

Page: 63 / 128

Configuration: Statistics
63
BAT 11b
Release 1.0 03/04
LAN Statistics:
• TX Total
Total number of packets sent successfully.
• TX Dropped
Total number of dropped packets; refers to the packets to be
sent.
• TX Collision
Total number of packets which were dropped due to collisions on
the medium; refers to the packets to be sent.
• TX Late Collision
A late collision indicates that another system attempted to
transmit after your machine (the one displaying the message) has
transmitted at least the first 60 bytes of its frame (packet) Since
the amount of time it takes to send 60 bytes (50.2 microseconds)
is long enough for round trip propagation delay on even the
largest network, a correctly configured network will never allow
this transmission condition. Something related to the network
topology is causing a problem.
A late collision invariably indicates that one or more packets were
lost by the Ethernet. They will almost always be retransmitted by
the “higher network layers,” but only after a delay.
• TX Excessive Collision
Total number of packets where collisions occurred repeatedly.
• TX Total
Total number of packets received successfully.
• RX Dropped
Total number of dropped packets; refers to the packets to be
received.
• RX Overflow
Total number of packets which were dropped due to insufficient
buffer; refers to the packets to be received.
• RX Too Long
Total number of packets whose length exceeds the standard
Ethernet packet length (> 1518 bytes).