qosIfQueueServiceOrder

This object is used to provide an additional level of
priority that is required for certain queuing disciplines
and when the different queues that comprise a queue set
are serviced using a mix of queuing disciplines. This
object can be used to specify, for example, the order in
which queues will be serviced when priority queuing is
used. It also supports the ability to describe the
servicing hierarchy when a hybrid queuing scheme, such
as priority queuing coupled with weighted fair queuing,
is used.
              
Queue service priority is assigned such that a lower
service order value indicates a higher priority. For
example, a priority queue with a value of 1 will be
serviced (i.e., drained) before another priority queue
with a service order value of 2.
              
Note that multiple queues that are logically associated,
based on the queuing discipline that is being employed,
will be assigned the same service order value.  Under
this scenario, other parameters that are related to the
queuing discipline determine the order of queue servicing
(e.g., queue drain size is used for 'wfq'). 
              
For example, an interface that is associated with a queue
set supporting two priority queues and three queues that 
are serviced using WFQ would be modeled as follows:
              
  Q Index  Q Discipline  Q Drain Size  Q Service Order
     22         pq(1)         -              1
     23         pq(1)         -              2
     24        wfq(3)        500             3
     25        wfq(3)        350             3
     26        wfq(3)        150             3
              
The queue set presented in this example would service
all queued traffic in queue 22 first, followed by all of
the queued traffic in queue 23. Next the queued traffic
in queues 24 through 26 would be serviced in a round
robin fashion with queue 24 receiving 50% of the available
bandwidth, queue 25 receiving 35% of the available
bandwidth and queue 26 receiving 15% of the available
bandwidth. This example is presented for expository 
purposes and has been simplified accordingly.
              
Note that, in this example, queues 24, 25 and 26 form a
queue cluster. Members of a queue cluster are all assigned
the same qosIfQueueServiceOrder as there are tightly
coupled. The qosIfQueueDrainSize attribute is used to 
determine the additional processing characteristics of 
the individual queues in a cluster.

MIB

QOS-POLICY-IP-PIB

OID

.1.3.6.1.4.1.45.4.2.1.1.2.1.9

Type

column

Access

readwrite

Status

current

Parent

qosIfQueueEntry

Table

qosIfQueueTable

Siblings

11