Working with the M111

Configuring Quality of Service (QoS)

Very-high, high, normal, low priority

This mechanism is unique to the M111. It enables you to assign a single priority level to all traffic on a station profile. If you enable one of these priority mechanisms, it takes precedence regardless of the existing priority assigned to the traffic when it is received.

Queue

Priority value

 

 

1

Very-high

 

 

2

High

 

 

3

Normal

 

 

4

Low

 

 

Differentiated Services (DiffServ)

This mechanism classifies traffic based on the value of the Differentiated Services (DS) codepoint field in IPv4 and IPv6 packet headers (as defined in RFC2474). The codepoint is composed of the six most significant bits of the DS field.

Queue

DiffServ

DS codepoint value

 

 

 

 

1

111000

(Network control)

 

110000

(Internetwork control)

 

 

 

2

101000

(Critical)

 

100000

(Flash override)

 

 

 

3

011000

(Flash)

 

000100

(Routine)

 

 

 

4

010000

(Immediate)

 

001000

(Priority)

 

 

 

TOS

This mechanism classifies traffic based on value of the TOS (Type of Service) field in an IP packet header.

TOS

Queue Type of Service field value

10x30, 0xE0, 0x88, 0xB8

20x28, 0xA0

30x08, 0x20

4All other TOS traffic

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