Quality of Service (QoS): Managing Bandwidth More Effectively

Differentiated Services Codepoint (DSCP) Mapping

Table 5-9.The Default DSCP Policy Table

 

 

 

 

 

 

 

 

DSCP Policy

802.1p Priority

DSCP Policy

802.1p Priority

DSCP Policy

802.1p Priority

 

 

 

 

 

 

000000

No-override

010110

3*

101011

No-override

000001

No-override

010111

No-override

101100

No-override

000010

No-override

011000

No-override

101101

No-override

000011

No-override

011001

No-override

101110

7**

000100

No-override

011010

4*

101111

No-override

000101

No-override

011011

No-override

110000

No-override

000110

No-override

011100

4*

110001

No-override

000111

No-override

011101

No-override

110010

No-override

001000

No-override

011110

5*

110011

No-override

001001

No-override

011111

No-override

110100

No-override

001010

1*

100000

No-override

110101

No-override

001011

No-override

100001

No-override

110110

No-override

001100

1*

100010

6*

110111

No-override

001101

No-override

100011

No-override

111000

No-override

001110

2*

100100

6*

111001

No-override

001111

No-override

100101

No-override

111010

No-override

010000

No-override

100110

7*

111011

No-override

010001

No-override

100111

No-override

111100

No-override

010010

0 *

101000

No-override

111101

No-override

010011

No-override

101001

No-override

111110

No-override

010100

0 *

101010

No-override

111111

No-override

010101

No-override

 

 

 

 

 

 

 

*Assured Forwarding codepoints; configured by default on the switches covered in this guide.

These codepoints are configured as “No-override”.

 

 

**Expedited Forwarding codepoint configured by default.

 

 

 

 

 

 

 

 

Default Priority Settings for Selected Codepoints

In a few cases, such as 001010 and 001100, a default policy (implied by the DSCP standards for Assured-Forwarding and Expedited-Forwarding) is used. You can change the priorities for the default policies by using qos dscp-map

<codepoint > priority < 0 - 7 >).(These policies are not in effect unless you have either applied the policies to a QoS classifier or configured QoS Type-of- Service to be in diff-servicesmode.)

Quickly Listing Non-Default Codepoint Settings

Table 5-9 lists the switch’s default codepoint/priority settings. If you change the priority of any codepoint setting to a non-default value and then execute write memory, the switch will list the non-default setting in the show config display.

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