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D-Link DGS-1210-28XS/ME [233/519] Show scheduling_mechanism

D-Link DGS-1210-52/ME rev.B [233/519] Show scheduling_mechanism

DGS-1210/ME Metro Ethernet Switch CLI Reference Guide

215

Description

The config scheduling_mechanism command

configures the

scheduling mechanism for the QoS function. It

allows the user to

select between a round robin (WRR) and a s

trict mechanism for

emptying the priority classes of service of the QoS function. The

Switch contains four hardware priority classes of service. Incoming

packets must be mapped to one of these four

hardware priority

classes of service, or queues. This command is used to specify the

rotation by which these four hardware priority queues are emptied.

The Switch’s default is to empty the four hardware priority queues in

order − from the highest priority hardware queue (class 3

) to the

lowest priority hardware queue (class 0). Each queue will transmit all

of the packets in its buffer before allowing the next lower priority

queue to transmit its packets. A lower priority hardware queue will

be pre-empted from emptying its queue if a packet is received on a

higher priority hardware queue. The packet received on the higher

priority hardware queue transmits its packet b

efore allowing the

lower priority hardware queue to resume clearing its queue.

Parameters

strict – Specifies

that the highest class of service is the first to be

processed. That is, the highest class of service should finish

emptying before the others begin.

wrr – Specifies that the priority classes of service are to empty

packets in a weighted roundrobin (WRR) order.

1st7wrr – Specifies that the highest priority queue of service to be a

strict mechanism and be the first to be processed. Others will be the

round robin (WRR) mode.

2st6wrr – Specifies that the first and second highest priority queue of

service to be strict mechanism, others will be the round robin (WRR)

mode.

Restrictions Only administrator or operator level users can issue this command.

Example usage:

To configure the traffic scheduling mechanism for each COS queue:

DGS-1210-28MP/ME:5# config scheduling_mechanism strict

Command: config scheduling_mechanism strict

Success.

DGS-1210-28MP/ME:5#

show scheduling_mechanism

Purpose To display the current traffic scheduling mechanisms in use on the

Switch.

Syntax

show scheduling_mechanism

Description

The show scheduling_mechanism command displays the current

traffic scheduling mechanisms in use on the Switch.

Parameters None.

Restrictions None.

Example usage:

To show the scheduling mechanism:

DGS-1210-28MP/ME:5# show scheduling_mechanism

D-Link DGS-1210-28XS/ME [233/519] Show scheduling_mechanism

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