Nortel BayStack 380, Инструкция по использованию, Страница: 129 / 218

Chapter 3 Using the console interface 129
Using the BayStack 380 10/100/1000 Switch
Table 22 Policy Configuration screen fields
Field Description
Policy Type Specifies the type of policy. There are 2 types: weighted round robin, and strict.
Weighted RR Each queue is assigned a weight. This value indicates how many packets may
be transmitted out of the queue before the next highest queue is serviced.
Control may transfer to the next highest queue even though the higher priority
queues have not emptied
To determine the percentage of bandwidth allocated to each queue, add the
total weight and then divide each queue weight by that value. This formula
works only when all queues are fully utilized.
Strict The strict dequeuing algorithm empties the higher priority queues first
Once the higher priority queue is empty, then the next priority queue is
serviced.
If a packet comes out of a higher priority queue transmission out of the lower
priority queue is suspended until transmission from the higher priority queues
finish transmitting.
Q Weight .This value indicates how many packets may be transmitted out of the queue
before the next highest queue is serviced.