Avaya 580, 882 Queue-Servicing Algorithms

Document No. 10-300077, Issue 2 25-33
80-Series QoS
Queue-Servicing Algorithms
The following queue-servicing algorithms are available for egress queues:
■Weighted fair queueing (WFQ)
■Strict Priority
■Class-based queueing (CBQ)
■Class-based weighted fair queueing (CBWFQ)
* Note: In earlier versions of the switch software, you could set ingress
queues to use the weighted fair queuing (WFQ) and strict
priority queue-servicing algorithms. In v5.3.1 and late r , you can
set only egress queues to use these queue-servicing algorithms.
To service ingress queues, use the policing feature.
This section contains the following information and procedures:
■WFQ
■Strict Priority Queueing
■CBQ
■CBWFQ
■Management Traffic
■Setting Up WFQ
■Setting Up Strict Priority Queueing
■Setting Up CBQ
■Setting Up CBWFQ
■Displaying the Queue-Service Sett ings
WFQ
How WFQ Works WFQ is the default queue-servicing algorithm. When a port is set to use the
WFQ algorithm, each queue:
■Is assigned a weight increment. This value never changes.
■Maintains an accumulated weight. After the switch services a
queue, its accumulated weight is reset to the value of its weight
increment, and the accumulated we ig ht for the other queues is
increased by their respective weight increments.