Intel 460T manual Configure Advanced Switch Settings

C H A P T E R 5 Intel Express 460T Standalone Switch Users Guide

Configure Advanced Switch Settings

LOCATION

Main Menu

Configure Device

Switch Settings Advanced Switch Settings

Description

Auto-partition capability on all ports: If this option is enabled, the switch partitions the port when more than 61 consecutive collisions occur while receiving data. The first time the switch receives a good packet it unpartitions the port. If a port is partitioned the switch can transmit data over this port, but cannot receive data.

Head of Line (HOL) Blocking Prevention: If this option is enabled it prevents the forwarding of data to a port that is blocked. Normally, when the switch sends traffic to a port it goes to the port’s transmit queue and is sent out. If the port’s transmit queue is already busy trying to send out data, the switch places the waiting traffic in the buffer memory until the port is ready to send it out.

However, if the port’s transmit queue remains full, the switch fills up more of the buffer with traffic waiting to be sent on that port. HOL blocking assumes that it is better to drop the traffic waiting in the buffer than to continue using more memory and impacting performance across all the ports.

High-priority packet service ratio: Determines how many high-priority packets the switch sends before sending a low-priority packet. For example, a ratio of 8 high:1 low means that the switch sends out eight high-priority packets before sending out one low-priority packet.

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