Chapter 12 Configuring Quality of Service on the ML-Series Card

Configuring QoS

Table 12-2

Traffic Policy Commands (continued)

 

 

 

Command

 

Purpose

 

 

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

Specifies a CoS value or values to associate with the packet. The number

cos-value

 

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.

 

 

 

Attaching a Traffic Policy to an Interface

Use the service-policyinterface 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-policycommand syntax is as follows:

service-policy {input output} policy-map-nameno service-policy {input output} policy-map-name

Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2

 

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Cisco Systems ONS 15310-CL, Cisco ONS 15310-MA manual Attaching a Traffic Policy to an Interface, 12-15

ONS 15310-CL, ONS 15310-MA, Cisco ONS 15310-MA specifications

Cisco Systems has long been a leader in networking and telecommunications technology, and among its impressive lineup of products, the Cisco ONS 15310 series stands out as an essential solution for optical networking. This series includes models such as the ONS 15310-MA, ONS 15310-CL, and ONS 15310-CA, each designed to meet the diverse needs of service providers and enterprises seeking to enhance their optical transport networks.

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