D-Link DES-3326SR, Руководство пользователя

Страница: 76 / 240

D-Link DES-3326SR Layer 3 Switch
Configure QoS Output Scheduling
Open the QoS Output Scheduling menu to adjust settings for the four QoS Classes. You may then change the
Priority settings mapped to these Classes in the 802.1p User Priority setting menu (see below).
Figure 10- 1. QoS Output Scheduling
The MAX. Packets field specifies the number of packets that a queue will transmit before surrendering the
transmit buffer to the next lower priority queue in a round-robin fashion. The default value of 0 combined with
the default MAX. Latency value of 0 will enforce a strict scheduling for output queues. The maximum value for
MAX. Packets is 255.
The MAX. Latency field specifies the maximum amount of time—in multiples of 16 microseconds—that a
queue will have to wait before being given access to the transmit buffer. The MAX. Latency is a priority queue
timer. When it expires, it overrides the round-robin queuing and gives the priority queue that it was set for access
to the transmit buffer. The default value of 0 combined with the default MAX. Packets value of 0 will enforce a
strict scheduling for output queues. The maximum value for MAX. Latency is 255.
Type in the values desired for scheduling and click on the Apply button to make the changes.
NOTE: There is a small amount of additional latency introduced because the priority
queue that is transmitting at the time the MAX. Latency time expires will finish
transmitting its current packet before giving up the transmit buffer.
66