D-Link DES-3250TG Reference Manual page 117

DES-3250TG Layer 2 Fast Ethernet Switch User's Guide
config scheduling
max_packet and max_latency parameters
are set to 0) is to empty the 4 hardware
priority queues in order − from the highest
priority queue (hardware queue 3) to the
lowest priority queue (hardware queue 0).
Each hardware queue will transmit all of the
packets in its buffer before allowing the next
lower priority queue to transmit its packets.
When the lowest hardware priority queue
has finished transmitting all of its packets,
the highest hardware priority queue can
again transmit any packets it may have
received.
The max_packets parameter allows you to
specify the maximum number of packets a
given hardware priority queue can transmit
before allowing the next lowest hardware
priority queue to begin transmitting its
packets. A value between 0 and 255 can be
specified. For example, if a value of 3 is
specified, then the highest hardware priority
queue
transmit 3 packets − then the next lowest
hardware priority queue (number 2) will be
allowed to transmit 3 packets, and so on,
until all of the queues have transmitted 3
packets. The process will then repeat.
The max_latency parameter allows you to
specify the maximum amount of time that
packets
transmitted to a given hardware priority
queue. A value between 0 and 255 can be
specified. This number is then multiplied by
(number 3) will be
are delayed before
117
allowed to
being