Alcatel-Lucent OmniSwitch 6250 - Qos Default Servicing Mode

QoS Commands
OmniSwitch CLI Reference Guide November 2009 page 38-7
qos default servicing mode
Configures the default queuing scheme for destination (egress) ports.
qos default servicing mode {strict-priority | wrr [w0 w1 w2 w3 w4 w5 w6 w7] | drr] [w0 w1 w2 w3 w4
w5 w6 w7]}
Syntax Definitions
strict-priority Selects the strict priority queuing scheme as the default servicing mode.
All eight available queues on a port are serviced strictly by priority.
wrr Selects the weighted round robin (WRR) queuing scheme as the default
servicing mode. Traffic is serviced based on the weight of each queue.
drr Selects the deficit round robin (DRR) queuing scheme as the default
servicing mode. Traffic is serviced based on the weight of each queue.
w0 w1 w2 w3 w4 w5 w6 w7 The value of the desired weight for each of the queues when WRR,
priority-WRR, or DRR is the active queuing scheme. The range is 0 to
15.
Defaults
Platforms Supported
OmniSwitch 6250
Usage Guidelines
• Each queue can have a different weight value and configuring these values in ascending or descending
order is not required. When a queue is given a weight of 0, it is configured as a Strict-Priority queue.
• Use the wrr parameter to configure a Priority-WRR queuing scheme, which consists of a combination
of Strict-Priority queues (zero weight) and WRR queues (non-zero weight).
• Using the qos default servicing mode command does not override configuration values that were set
on a per port basis with the qos port servicing mode command.
• The servicing mode only applies to destination (egress) ports because this is where traffic shaping
occurs. Even though the qos port servicing mode and qos default servicing mode commands are
allowed on source (ingress) ports, they do not affect traffic on these ports.
Examples
-> qos default servicing mode strict-priority
-> qos default servicing mode wrr 1 2 3 4 5 6 7 8
-> qos default servicing mode drr 10 0 12 14 0 0 8 1
parameter default
strict-priority | priority-wrr |
wrr | drr
strict-priority
w0 w1 w2 w3 w4 w5 w6 w7 1 (best effort)