Cisco Cisco ASR 5000
GGSN Service Configuration Mode Commands
▀ ip qos-dscp
▄ Command Line Interface Reference, StarOS Release 18
5254
+
Indicates that more than one of the keywords can be entered in a single command.
Usage
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.
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:
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:
Table 30. Class structure for assured forwarding (af) levels
Drop Precedence
Class
Class 1
Class 2
Class 3
Class 4
Low
af11
af21
af31
af41
Medium
af12
af22
af32
af41
High
af13
af23
af33
af43
Table 31. DSCP Precedence
Precedence (low to high)
DSCP
0
Best Effort (be)
1
Class 1
2
Class 2
3
Class 3
4
Class 4
5
Express Forwarding (ef)
The DSCP level can be configured for multiple traffic patterns within a single instance of this command.
The
The
no ip qos-dscp
command can be issued to remove a QoS setting and return it to its default setting.
Example
The following command configures the DSCP level for QCI to be Expedited Forwarding,
ef
:
ip qos-dscp qci 1 ef