Dscp Values - Cisco 10000 Series Configuration Manual

IP Differentiated Services Code Point Marking

DSCP Values

The following differentiated services (DiffServ) RFCs define DSCP values:
•
•
•
•
The RFCs do not dictate the way to implement PHBs; this is the responsibility of the vendor. Cisco
implements queuing techniques that can base their PHB on the IP precedence or DSCP value in the IP
header of a packet. Based on DSCP or IP precedence, traffic can be put into a particular service class.
Packets within a service class are treated the same way.
Table 7-4
Table 7-4
DSCP Value
0
8
16
24
32
40
48
56
10
12
14
18
20
22
26
28
30
34
36
38
46
Cisco 10000 Series Router Quality of Service Configuration Guide
7-8
RFC-2474, Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers
RFC-2475, An Architecture for Differentiated Services
RFC-2597, Assured Forwarding PHB Group
RFC-2598, An Expedited Forwarding PHB
lists only the DSCP values suggested by the DiffServ RFCs.
DSCP Values
DSCP Name
Best Effort or Default
CS1
CS2
CS3
CS4
CS5
CS6
CS7
AF11
AF12
AF13
AF21
AF22
AF23
AF31
AF32
AF33
AF41
AF42
AF43
EF
Chapter 7
Binary Value Defined in RFC
000000 2475
001000
010000
011000
100000
101000
110000
111000
001010 2597
001100
001110
010010
010100
010110
011010
011100
011110
100010
100100
100110
101110 2598
Marking Traffic
OL-7433-09