Assigning CoS Components to Interfaces

After you have defined CoS components, you must assign them to logical or physical interfaces. The CoS Quick Configuration pages allow you to assign scheduler maps to physical or logical interfaces and to assign forwarding classes, classifiers, rewrite rules, or virtual channel groups to logical interfaces.

Figure 41 shows the initial Quick Configuration page for assigning CoS components to interfaces. The page displays the Services Router interfaces available for CoS component assignment and the status of existing CoS components.

Figure 41: Assignment of CoS Components to Interfaces Quick Configuration Page

Assignment
of CoS Components to Interfaces Quick Configuration Page

To assign CoS components to interfaces with Quick Configuration:

In the J-Web interface, select Configuration>Quick Configuration>Class of Service>Assign Class of Service Components to Interfaces.
Enter information into these Quick Configuration pages, as described in Table 118.
Click one of the following buttons after completing configuration on any Quick Configuration main page:
- To apply the configuration and stay in current the Quick Configuration page, click Apply.
- To apply the configuration and return to the previous Quick Configuration page, click OK.
- To cancel your entries and return to the previous Quick Configuration page, click Cancel.
To verify the CoS configuration, see the JUNOS Enhanced Services Interfaces and Routing Configuration Guide.

Table 118: Assigning CoS Components to Interfaces Quick Configuration Summary

Field	Function	Your Action
Class of Service Interfaces
Interface Name (See the interface naming conventions in the JUNOS Software with Enhanced Services Interfaces and Routing Configuration Guide.)	Lists the names of physical and logical interfaces configured on the system. Allows you to edit CoS component assignments to physical and logical interfaces.	To edit an interface's CoS assignments, click the interface.
Class of Service Overview	Displays the CoS components assigned to a particular interface—for example, information about DSCP classifiers, EXP classifiers, or DSCP rewrite rules.	None.
Add	Allows you to add a CoS service to a physical interface.	To add a CoS service to a physical interface, click Add.
Delete	Removes CoS services assigned to a specific interface.	To remove CoS services assigned to a specific interface, locate the interface name, click the check box next to it, and click Delete.
Add CoS Service to a Physical Interface/Edit CoS Physical Interface
Physical Interface Name	Specifies the name of a physical interface. Allows you to assign CoS components to a set of interfaces at the same time.	To specify an interface for CoS assignment, type its name in the Physical Interface Name box. To specify a set of interfaces for CoS assignment, use the wildcard character ()—for example, ge-0//0.
Scheduler Map	Specifies a predefined scheduler map for the physical interface. A scheduler map enables the physical interface to have more than one set of output queues. Note: For 4-port Fast Ethernet ePIMs, if you apply a CoS scheduler map on outgoing (egress) traffic, the router does not divide the bandwidth appropriately among the CoS queues. As a workaround configure enforced CoS shaping on the ports.	To specify a map for an interface, select it from the Scheduler Map list.
Add	Allows you to add a CoS service to a logical interface on a specified physical interface.	To add a CoS Service to a logical interface, click Add.
Add CoS Service to a Logical Interface Unit/Edit CoS Logical Interface Unit
Logical Interface Unit Name	Specifies the name of a logical interface. Allows you to assign CoS components to all logical interfaces configured on a physical interface at the same time.	To specify an interface for CoS assignment, type its name in the Logical Interface Unit Name box. To assign CoS services to all logical interfaces configured on this physical interface, type the wildcard character (*).
Scheduler Map	Specifies a predefined scheduler map for this interface. Note: You can configure either a scheduler map or a virtual channel group on a logical interface, not both.	To assign a scheduler map to the interface, select it from the list.
Forwarding Class	Assigns a predefined forwarding class to incoming packets on a logical interface.	To assign a forwarding class to the interface, select it.
Virtual Channel Group	Applies a virtual channel group to a logical interface. Applying a virtual channel group creates a set of eight queues for each virtual channel in the group. Note: You can configure either a scheduler map or a virtual channel group on a logical interface, not both.	To specify a virtual channel group for the interface, select it from the list.
Classifiers	Allows you to apply classification maps to a logical interface. Classifiers assign a forwarding class and loss priority to an incoming packet based on its CoS value.	To assign a classification map to the interface, select an appropriate classifier for each CoS value type used on the interface.
Rewrite Rules	Allows you to apply rewrite rule configurations to a logical interface. Rewrite rules rewrite the CoS values in an outgoing packet based on forwarding class and loss priority. You can choose to apply your own rewrite rule or a default one. The default rewrite assignments are based on the default bit definitions of DSCP, DSCP IPv6, MPLS EXP, and IP precedence.	To apply a rewrite rule configuration to the interface, select a rule for each CoS value type used on the interface.

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