Dell N1100-ON, Reference Manual

Page: 673 / 2332

Layer 2 Switching Commands
673
When ETS is operational on an N4000 series 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 thro
ugh 6 as follows:
Cos Queue 0—5% scheduler capacity
CoS Queue 1—5% scheduler capacity
CoS Queue 2—10% scheduler capacity
CoS Queue 3—10% scheduler capacity
CoS Queue 4-7—Shared scheduler capacity.
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.
NOTE:
On the N1500 Series switches, this command enables Simple
RED since the hardware is not capable of Weighted RED.
Syntax
cos-queue { random-detect queue-id1 [queue-id2..queue-idn]}
no cos-queue {random-detect queue-id1 [queue-id2..queue-idn]}
• queue-id—An integer indicating the internal CoS queue-id which is to be
enabled for WRED. Range 0-6. Up to 7 queues may be simultaneously
specified.