DGS-6604
m
qos deficit-round-robin
CLI Reference Guide
508
All queues are serviced until their credit counter is zero or negative and a packet
is transmitted completely. As this condition happens, the credits are replenished.
When the credits are replenished, as a quantum of credits are added to each
CoS queue credit counter. The quantum for each CoS queue may different
based on the user configuration.
To set a CoS in strict priority mode, any higher priority CoS must be in strict
priority mode. For example, to set CoS 5 in strict priority mode, CoS 6 and 7 have
to be in strict priority mode.
WRR operates by transmitting permitted packets into the transmit queue in round
robin order. Initially, each queue sets its weight to a configurable weighting. Every
time a packet from a higher priority CoS queue is sent, the number of the packet
is subtracted from the corresponding weight. When the credit counter reaches
zero, the queue is no longer serviced until its weight is replenished. After this
repeats for each queue, the next lower priority CoS queue is serviced in turn.
All queues are serviced until their weight is zero and a packet is transmitted
completely. As this condition happens, the weights are replenished. When the
weights are replenished, weight is added to each CoS queue credit counter. The
weight for each CoS queue may different based on the user configuration.
Examples
In the following example, deficit round robin is configured on eth 3.1. For this
case, quantum for queue 0 is set to 32 Kbytes; quantum for queue 1 is set to 32
Kbytes; quantum for queue 2 is set to 64 Kbytes; quantum for queue 3 is set to
64 Kbytes; quantum for queue 4 is set to 128 Kbytes; quantum for queue 5 is set
to 128 Kbytes; quantum for queue 6 is set to 32 Kbytes; and quantum for queue
7 remains as 0.
Switch(config)# interface eth3.1
Switch(config-if)# qos deficit-round-robin 0 quantum 2
Switch(config-if)# qos deficit-round-robin 1 quantum 2
Switch(config-if)# qos deficit-round-robin 2 quantum 4
Switch(config-if)# qos deficit-round-robin 3 quantum 4
Switch(config-if)# qos deficit-round-robin 4 quantum 8
Switch(config-if)# qos deficit-round-robin 5 quantum 8
Switch(config-if)# qos deficit-round-robin 6 quantum 2
Switch(config-if)# qos deficit-round-robin 7 quantum 0
Summary of Contents for DGS-6600 Series
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