Cabletron Systems SEHI-22FL - Manual (Page 70)

The Device Statistics Screen
SEHI User’s Guide 7-21
The following sections describe Device Statistics screen fields:
BYTES RECEIVED
Displays the number of bytes received.
FRAMES RECEIVED
Displays the number of frames received.
ERRORS RECEIVED
Displays the number of errors received.
COLLISIONS
Displays the number of collisions received.
OOW COLLISIONS
Displays the number of Out Of Window collisions. OOW collisions are
usually caused by the network being too long where the round trip
propagation delay is greater than 51.2
µ
s (the collision domain is too
large), a station somewhere on the network is violating Carrier Sense and
transmitting at will, or a cable somewhere on the network failed during
the transmission of the packet.
CRC ERRORS
Displays the number of packets with bad Cyclic Redundancy Checks
(CRC) that have been received from the network. The CRC is a 4-byte
field in the data packet that ensures that the transmitted data that is
received is the same as the data that was originally sent.
ALIGNMENT ERRORS
Displays the number of errors due to misaligned packets.
RUNT PACKETS
Displays the number of runt packets received from the network. A runt
packet is less than the minimum Ethernet frame size of 64 bytes, not
including preamble.
GIANT PACKETS
Displays the number of packets received whose size exceeded 1518 data
bytes, not including preamble.
SEHI Book Page 21 Friday, April 19, 1996 10:46 AM