A 7250 SROS VLAN QoS policy defines queue parameters for VLAN egress queues. The policy allows configuration of CIR weight profiles, CIR/PIR values, and the assignment of 7250 SROS Queue Management policies.

The 7250 SROS VLAN QoS policy also allows viewing of the mapping of forwarding classes to queues. FCs are mapped to queues by default; the mapping is not user-configurable.

The 7250 SROS VLAN QoS policy allows the enabling or disabling of VOQ (Virtual Output Queue) statistics collection, for supporting 7250 IXR chassis types. Statistics collection is enabled using the Stat Mode parameter.

For supporting NEs, the policy allows configuration of a Packet Byte Offset value. See the NE documentation for more information about PBO on the 7250 IXR.

The 7250 SROS VLAN QoS policy is assigned to L2 access interfaces on VPLS and VLL services, to L3 access interfaces on IES and VPRN services, and to network interfaces. See the following procedures:

• for VLL: To assign ingress and egress QoS policies to a VLL L2 access interface

• for VPLS services: To assign QoS policies or to enable a MAC override address to a VPLS or MVPLS L2 access interface

• for IES: To assign ingress and egress QoS policies to an IES L3 access interface

• for VPRN: To assign ingress and egress QoS policies to a VPRN L3 access interface

• for L3 network interfaces: To create an L3 network interface on a routing instance and To configure L3 network interfaces

7250 SROS VLAN QoS policies are identified by the policy name; policy ID numbers are not used.

A default 7250 VLAN QoS policy is applied if no user-configured policy is explicitly used. The default policy cannot be deleted or modified.

The 7250 IXR supports 7250 SROS VLAN QoS policies. For more information about QoS policy support on the 7250 IXR, see 7250 IXR QoS policies.

Support for specific parameters and features varies, depending on the chassis type. Local definitions of the policy do not necessarily support all configurations in the global policy.