Enterasys Networks Matrix E7, 6000 manual Broadcasts, Collisions, Hard Errors, Soft Errors

Managing Ethernet MicroLAN Modules

Bytes

Displays the total number of bytes – including error packets – that have been processed by the selected repeater, board, or port. Note that this byte count includes errors.

Broadcasts

Displays the total number of broadcast frames that have been processed by the repeater, board, or port. Broadcast packets have a single address recognized by each station on the net; this address is designated in IP address form as 255.255.255.255, or in MAC hexadecimal form as FF-FF-FF-FF-FF-FF. ARP and RARP requests sent by bridges and routers are broadcast messages.

Packets

Displays the total number of packets processed by the repeater, board, or port. Again, note that the packet count includes errors.

Collisions

Displays the combined number of transmit and receive collisions detected by the repeater, board, or port. Transmit collisions are those the Ethernet MicroLAN module detects while transmitting a packet, which means the Ethernet MicroLAN module has transmitted one of the colliding packets; receive collisions are those detected by the Ethernet MicroLAN module while it is receiving a transmission.

Hard Errors
OOW Collisions	Displays the number of collisions out of the standard collision
	window (51.2 µs) experienced by the repeater, board, or port.
	Out-of-window collisions typically indicate a network design
	flaw.
Giants	Displays the number of giant packets that the repeater, board,
	or port has detected. A giant packet exceeds the maximum
	Ethernet frame size of 1518 bytes (excluding the preamble).
Soft Errors
CRC Errors	Displays the total number of packets with CRC (Cyclical
	Redundancy Check) errors that the repeater, board, or port has
	received from the network. CRC errors occur when packets are
	somehow damaged in transit.
Alignment Errors	Displays the total number of misaligned packets received by
	the repeater, board, or port. A misaligned packet is one that
	contains a non-integral number of bytes (that is, any unit of bits
	less than a byte). Alignment errors are also known as framing
	errors.
Runts	Displays the number of runt packets that the repeater, board, or
	port has received from the network. A runt packet is one that is
	less than the minimum Ethernet frame size of 64 bytes.

5-4 Repeater Statistics