Allied-telesis AT-S21 Manual do Utilizador descarregar pdf (Página 46)

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Menu:

System configuration>No backpressure

Backpressure is disabled as a default.

Note

Although listed in the software, this option is not available and should

remain disabled.

In half-duplex mode, the switch implements the backpressure

methodology when its input buffer is running out of resources; for

example, outbound packets are traversing a single uplink port. When

backpressure is enabled, the switch simulates a collision when its

input buffers are filled up so that sending devices will defer

transmissions. These sending devices will retry transmissions

according to the Ethernet back-off algorithm. Once switch resources

are available again, it stops sending the collision signals and devices

may freely transmit again.

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Allied-telesis AT-S21 Manual do Utilizador Página 46