Shared-Queue QoS Policy Command Reference
664 Quality of Service Guide
Parameters percent — The percent of buffers reserved from the total buffer pool space, expressed as a decimal
integer. If 10 MB is the total buffers in the buffer pool, a value of 10 would reserve 1MB
(10%) of buffer space for the forwarding class queue. The value 0 specifies that no reserved
buffers are required by the queue (a minimal reserved size can be applied for scheduling
purposes).
Values 0 to 100
high-prio-only
Syntax high-prio-only percent
no high-prio-only
Context config>qos>shared-queue>queue
Description The high-prio-only command allows the reservation of queue buffers for use exclusively by high
priority packets as a default condition for access buffer queues for this shared queue policy.
The difference between the MBS size for the queue and the high priority reserve defines the threshold
where low priority traffic will be discarded. The result is used on the queue to define a threshold where
low priority packets are discarded, leaving the rest of the default MBS size for high priority packets
only. If the current MBS for the queue is 10MBytes, a value of 5 will result in a high priority reserve
on the queue of 500KBytes. A value of 0 specifies that none of the MBS of the queue will be reserved
for high priority traffic. This does not affect RED slope operation for packets attempting to be queued.
Modifying the current MBS for the queue through the mbs command will cause the default high-prio-
only function to be recalculated and applied to the queue. The high-prio-only command as defined for
the specific queue can be used to override the default high-prio-only setting as defined in the network
queue policy. This prevents the high-prio-only command for the shared queue policy from having an
affect on the queue.
Table 44: CBS Forwarding Class Default Values
Forwarding Class Fowarding Class Label Default CBS
Network-Control nc 3
High-1 h1 3
Expedited ef 1
High-2 h2 1
Low-1 l1 3
Assured af 1
Low-2 l2 3
Best-Effort be 1
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