Cos-Queue Random-Detect - Dell Networking 7048 Reference Manual

User Guidelines
The maximum number of queues supported per interface is seven. It is
recommended that the operator avoid the use of queue 5-7 in order to avoid
conflicts with inter- and intra-network control traffic.
In order to better accommodate bursty traffic, it is recommended that the
sum of the configured min-bandwidths be much less than 100%. Configuring
the minimum bandwidths such that they sum to 100% effectively locks the
scheduler such that bandwidth sharing by lower priority queues cannot be
accommodated under congestion conditions.
When ETS is operational on a switch, this command overrides the ETS
assignments and assigns minimum bandwidth constraints across traffic class
groups. This allows the administrator to ensure that the frame scheduler does
not completely starve lower priority groups when strict priority is enabled on a
high numbered TCG. Specifically, assigning a minimum bandwidth to a
lower numbered TCG, even when strict priority is enabled on a higher
numbered TCG, will alter the normal scheduler behavior and cause the
scheduler to process frames from the lower numbered TCG to conform to the
min-bandwidth constraint.
Example
The following example displays how to specify the minimum transmission
bandwidth guarantee for cos-queues 0 through 6.
console(config)#cos-queue min-bandwidth 5 5 10 10 0 0 0

cos-queue random-detect

Use the cos-queue random-detect command in Global Configuration or
Interface Configuration mode to enable WRED queue management policy
on an interface CoS queue. Use the no form of the command to disable
WRED policy for a CoS queue on an interface.
Syntax
queue-id1 queue-id2 queue-idn
cos-queue {random-detect [ .. ]}
queue-id1 queue-id2 queue-idn
no cos-queue {random-detect [ .. ]}
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QoS Commands