D-Link TM DES-6500 manual Config scheduling classid 0-6 maxpacket value

Models: TM DES-6500

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xStack DES-6500 Modular Layer 3 Chassis Ethernet Switch CLI Manual

DES-6500:4#show bandwidth_control 1:1-1:10

Command: show bandwidth_control 1:1-1:10

Bandwidth Control Table

Port

RX Rate (Mbit/sec) TX_RATE (Mbit/sec)

----

------------------------

----------------------

1:1

no_limit

10

1:2

no_limit

10

1:3

no_limit

10

1:4

no_limit

10

1:5

no_limit

10

1:6

no_limit

10

1:7

no_limit

10

1:8

no_limit

10

1:9

no_limit

10

1:10

no_limit

10

DES-6500:4#

config scheduling

Purpose

Used to configure traffic scheduling for each of the Switch’s

 

hardware priority classes.

Syntax

config scheduling <class_id 0-6> {max_packet <value 0-15>}

Description

The Switch contains seven hardware classes of service per

 

device. The Switch’s default settings draw down seven hardware

 

classes of service in order, from the highest priority class (Class 6)

 

to the lowest priority class (Class 0). Starting with the highest

 

priority class (Class 6), the highest priority class will transmit all of

 

the packets and empty its buffer before allowing the next lower

 

priority class to transmit its packets. The next highest priority class

 

will empty before proceeding to the next class and so on. Lower

 

priority classes are allowed to transmit only if the higher priority

 

classes in the buffer are completely emptied. Packets in the higher

 

priority classes are always emptied before any in the lower priority

 

classes.

 

The default settings for QoS scheduling employ this strict priority

 

scheme to empty priority classes.

 

The config scheduling command can be used to specify the

 

weighted round-robin (WRR) rotation by which these seven

 

hardware priority classes of service are reduced. To use a

 

weighted round-robin (WRR) scheme, the max_packets

 

parameters must not have a value of zero (0). (See Combination

 

Queue below.)

 

The max_packet parameter allows specification of the maximum

 

number of packets a given priority class can transmit per weighted

 

round-robin (WRR) scheduling cycle. This provides for a

 

controllable CoS behavior while allowing for other classes to

 

empty as well. A value between 0 and 15 packets can be specified

 

per priority queue.

 

Entering a 0 into the <value 0-15>field of the max_packet

 

parameter allows for the creation of a Combination Queue for the

 

forwarding of packets. This Combination Queue allows for a

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D-Link TM DES-6500 manual Config scheduling classid 0-6 maxpacket value