Intel 460T - Manual (Page 68)

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C H A P T E R 5 Intel Express 460T Standalone Switch Users Guide
Configure 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.
LOCATION
Main Menu
Configure Device
Switch Settings
Advanced Switch Settings