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Quality of Service (QoS): Managing Bandwidth More Effectively
Differentiated Services Codepoint (DSCP) Mapping
Table 5-9. The Default DSCP Policy Table
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-services mode.)
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.
DSCP Policy 802.1p Priority DSCP Policy 802.1p Priority DSCP Policy 802.1p Priority
000000
000001
000010
000011
000100
000101
000110
000111
001000
001001
001010
001011
001100
001101
001110
001111
010000
010001
010010
010011
010100
010101
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
1*
No-override
1*
No-override
2*
No-override
No-override
No-override
0 *
No-override
0 *
No-override
010110
010111
011000
011001
011010
011011
011100
011101
011110
011111
100000
100001
100010
100011
100100
100101
100110
100111
101000
101001
101010
3*
No-override
No-override
No-override
4*
No-override
4*
No-override
5*
No-override
No-override
No-override
6*
No-override
6*
No-override
7*
No-override
No-override
No-override
No-override
101011
101100
101101
101110
101111
110000
110001
110010
110011
110100
110101
110110
110111
111000
111001
111010
111011
111100
111101
111110
111111
No-override
No-override
No-override
7**
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
No-override
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.