User manual

11-15
Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide R8.5
78-18133-01
Chapter 11 Configuring Quality of Service on the ML-Series Card
Configuring QoS
Attaching a Traffic Policy to an Interface
Use the service-policy interface configuration command to attach a traffic policy to an interface and to
specify the direction in which the policy should be applied (either on packets coming into the interface
or packets leaving the interface). Only one traffic policy can be applied to an interface in a given
direction.
Use the no form of the command to detach a traffic policy from an interface. The service-policy
command syntax is as follows:
service-policy {input | output} policy-map-name
no service-policy {input | output} policy-map-name
ML_Series (config-pmap-c)# priority kbps
Specifies low latency queuing for the currently selected class. This
command can only be applied to an output. When the policy-map is
applied to an output, an output queue with strict priority is created for this
class. The only valid rate choice is in kilobits per second.
Note This priority command does not apply to the default class.
Note When using the priority action, the traffic in that class is given a
100 percent CIR, regardless of the rate entered as the priority rate.
To ensure that other bandwidth commitments are met for the
interface, a policer must be configured on the input of all interfaces
that might deliver traffic to this output class, limiting the peak rate
to the priority rate entered.
Note The true configurable bandwidth in kilobits per second is per port
and depends on how the ML-Series card is configured. The show
interface command shows the maximum bandwidth of a port (for
example, BW 100000 Kbit). The sum of all bandwidth and priority
actions applied to the interface, plus the cos priority-mcast
bandwidth, is not allowed to exceed the maximum bandwidth of
the port.
ML_Series (config-pmap-c)# set cos
cos-value
Specifies a CoS value or values to associate with the packet. The number
is in the range from 0 to 7.
This command can only be used in a policy-map applied to an output. It
specifies the VLAN CoS priority to set for the outbound packets in the
currently selected class. If QinQ is used, the top-level VLAN tag is
marked. If outbound packets have no VLAN tag, the action has no effect.
This action is applied to the packet after any set-cos action done by a
policer, and therefore overrides the CoS set by a policer action.
If a packet is marked by the policer and forwarded out through an interface
that also has a set-cos action assigned for the traffic class, the value
specified by the police action takes precedence in setting the IEEE 802.1p
CoS field.
This command also sets the CoS value in the RPR header for packets
exiting the ML-Series on the RPR interface.
Table 11-2 Traffic Policy Commands (continued)
Command Purpose