Alcatel-Lucent 6850-48 Guida Di Riferimento

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QoS Commands
OmniSwitch CLI Reference Guide
September 2009
page 52-7
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] | 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.
priority-wrr
Parameter not supported.
drr
Selects the deficit round robin (DRR) queuing scheme as the default 
servicing mode. Traffic is serviced based on the weight of each queue. 
This parameter is not supported on the OmniSwitch 6800.
w0 w1 w2 w3 w4 w5 w6 w7
The value of the desired weight for each of the queues when WRR or 
DRR is the active queuing scheme. The range is 0 to 15. 
Defaults
Platforms Supported
OmniSwitch 6400, 6850, 6855, 9000, 9000E
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. 
• When configuring the default queuing scheme on an OmniSwitch 6800, it is necessary to enter eight 
weight values, even though only six queues per port are available. The last two values entered are 
ignored.
• 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.
parameter
default
strict-priority | wrr | drr
strict-priority
w0 w1 w2 w3 w4 w5 w6 w7
1 (best effort)