Cabletron Systems SEHI100TX-22, User Manual

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The Device Statistics Screen
SEHI100TX User’s Guide 7-25
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 one or more of the following:
• The network being too long due to the round trip propagation delay
being greater than 5.12
µ
s (the collision domain is too large).
• A station somewhere on the network is violating Carrier Sense and is
transmitting at will.
• 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 that exceed 1518 data bytes, not
including preamble.
PORT ADMIN. STATUS
Displays the administrative status of the port selected. The two possible
status messages are Enable or Disable.