Cisco 10000 Series User Manual

7-8
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 7 Marking Traffic
IP Differentiated Services Code Point Marking
DSCP Values
The following differentiated services (DiffServ) RFCs define DSCP values:
• 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
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 lists only the DSCP values suggested by the DiffServ RFCs.
Ta b l e 7-4 DSCP Values
DSCP Value DSCP Name Binary Value Defined in RFC
0 Best Effort or Default 000000 2475
8 CS1 001000
16 CS2 010000
24 CS3 011000
32 CS4 100000
40 CS5 101000
48 CS6 110000
56 CS7 111000
10 AF11 001010 2597
12 AF12 001100
14 AF13 001110
18 AF21 010010
20 AF22 010100
22 AF23 010110
26 AF31 011010
28 AF32 011100
30 AF33 011110
34 AF41 100010
36 AF42 100100
38 AF43 100110
46 EF 101110 2598

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English