Cisco Cisco Packet Data Gateway (PDG)
Table 1: Default DSCP Value Matrix
3
2
1
Allocation Priority
Traffic Handling Priority
ef
ef
ef
1
ef
ef
ef
2
af21
af21
af21
3
af21
af21
af21
+
Indicates that more than one of the keywords can be entered in a single command.
Usage Guidelines
DSCP levels can be assigned to specific traffic patterns in order to ensure that data packets are delivered
according to the precedence with which they are tagged. The diffserv markings are applied to the outer IP
header of every GTP data packet. The diffserv marking of the inner IP header is not modified.
according to the precedence with which they are tagged. The diffserv markings are applied to the outer IP
header of every GTP data packet. The diffserv marking of the inner IP header is not modified.
The traffic patterns are defined by QCI (1 to 9). Data packets falling under the category of each of the traffic
patterns are tagged with a DSCP that further indicate their precedence as shown in the following tables:
patterns are tagged with a DSCP that further indicate their precedence as shown in the following tables:
Table 2: Class structure for assured forwarding (af) levels
Class
Drop Precedence
Class 4
Class 3
Class 2
Class 1
af41
af31
af21
af11
Low
af41
af32
af22
af12
Medium
af43
af33
af23
af13
High
Table 3: DSCP Precedence
DSCP
Precedence (low to high)
Best Effort (be)
0
Class 1
1
Class 2
2
Class 3
3
Class 4
4
Command Line Interface Reference, Modes G - H, StarOS Release 19
49
GGSN Service Configuration Mode Commands
ip qos-dscp