Cabletron Systems EMM-E6 Ethernet manual Device Statistics

Models: EMM-E6 Ethernet

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CHAPTER 11: DEVICE STATISTICS SCREEN

11.1DEVICE STATISTICS

This section describes Device Statistics screen data fields.

BYTES RECEIVED

Displays the number of bytes received.

FRAMES RECEIVED

Displays the number of frames received.

FRAMES FILTERED

Displays the total number of frames filtered.

FRAMES TRANSMITTED

Displays the total number of frames transmitted.

ERRORS RECEIVED

Displays the total 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 so long that the round trip propagation delay is greater than 51.2 ∝s (the collision domain is too large); a station somewhere on the network violating Carrier Sense and transmitting at will; or a cable somewhere on the network failing during the transmission of a 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. Misaligned packets contain a non-integral number of bytes (i.e., some bytes contain fewer than 8 bits).

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EMM-E6 User’s Guide

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Cabletron Systems EMM-E6 Ethernet manual Device Statistics