Cisco Cisco ASR 5000
AAA Introduction and Overview
Supported Features ▀
AAA Interface Administration and Reference, StarOS Release 18 ▄
19
DSCP Marking for Signaling Traffic
This feature is introduced to prioritize the signaling traffic based on DSCP marking on the IP packets of the signaling
messages. Diameter signaling messages also need to be marked with DS code points to classify/manage network traffic
and provide Quality of Service (QoS).
messages. Diameter signaling messages also need to be marked with DS code points to classify/manage network traffic
and provide Quality of Service (QoS).
Command
dscp
in the Diameter endpoint configuration mode is used to set the Differential Services Code Point
(DSCP) in the IP header of the Diameter messages sent from the Diameter endpoint.
The following recommended Per-Hop-Behaviours are predefined:
PHB
Description
DSCP value
TOS value
BE
Best effort PHB (Default)
000 000 (0)
0
EF
Expedited Forwarding PHB
101 110 (46)
184
AF11
Assured Forwarding Class 1 low drop PHB
001 010 (10)
40
AF12
Assured Forwarding Class 1 medium drop PHB
001 100 (12)
48
AF13
Assured Forwarding Class 1 high drop PHB
001 110 (14)
56
AF21
Assured Forwarding Class 2 low drop PHB
001 010 (18)
72
AF22
Assured Forwarding Class 2 medium drop PHB
001 100 (20)
80
AF23
Assured Forwarding Class 2 high drop PHB
001 110 (22)
88
AF31
Assured Forwarding Class 3 low drop PHB
001 010 (26)
104
AF32
Assured Forwarding Class 3 medium drop PHB
001 100 (28)
112
AF33
Assured Forwarding Class 3 high drop PHB
001 110 (30)
120
AF41
Assured Forwarding Class 4 low drop PHB
001 010 (34)
136
AF42
Assured Forwarding Class 4 medium drop PHB
001 100 (36)
144
AF43
Assured Forwarding Class 4 high drop PHB
001 110 (38)
152
CS1
Class Selector 1 PHB
001 000 (8)
32
CS2
Class Selector 2 PHB
010 000 (16)
64
CS3
Class Selector 3 PHB
011 000 (24)
96
CS4
Class Selector 4 PHB
100 000 (32)
128
CS5
Class Selector 5 PHB
101 000 (40)
160
CS6
Class Selector 6 PHB
110 000 (48)
192
CS7
Class Selector 7 PHB
111 000 (56)
224
Note the difference between DSCP and the TOS values. TOS is an 8 bit field, but DSCP uses only the leading 6 bits of
the TOS field.
the TOS field.
For more information on the command used for configuring this feature, refer to the Command Line Interface
Reference.
Reference.