Allied-telesis AT-S21 Manual do Utilizador descarregar pdf (Página 63)

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4-9

Expect transmit errors to be very small. The switch may receive

a number of bad frames, but the switch drops those and sends

only good frames.

See Table 4-2 for a definition of transmit frames.

To view transmitted statistics per port

1. Select Individual Port Overview from the Transmit

Statistics Graph screen to display a list of ports.

2. Select a port number to view a graph of that port’s transmit

statistics.

Table 4-2

Transmit Ethernet Frames

Frame Type Description

Total good transmits Total frames transmitted by the switch without errors since the last

reset

Broadcasts Frames forwarded by the switch destined for

ALL

nodes on the

network, excluding multicast frames

Multicasts Frames forwarded by the switch destined for multiple but specific

addresses, excluding broadcast frames

Transmits deferred Frames whose transmission has been deferred by the switch due to

lack of resources; they are not stored in the buffer and eventually

dropped

Single collision Frames from two ports that collided because they were sent at the

same time; considered normal

Multiple collisions The same frames collide more than once; they are expected to be

far less than single collisions and may indicate a problem with the

sending devices

Late collisions Collisions that occur after 64-byte times of the frame had elapsed

Excessive collisions A frequency of frame collisions detected by the port that causes the

interface to fail to transmit frames

Transmit timeouts Number of times the switch has stopped trying to transmit due to

collisions

1 2 ... 58 59 60 61 62 63 64 65 66 67 68 ... 89 90

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