Configuring Modular Quality of Service Congestion Management on Cisco IOS XR Software

How to Configure QoS Congestion Management on Cisco IOS XR Software

 

Command or Action

Purpose

Step 13

 

 

service-policy {input output} policy-map

Attaches a policy map to an input or output interface to be

 

 

used as the service policy for that interface.

 

Example:

The traffic policy evaluates all traffic leaving that

 

RP/0/RP0/CPU0:router(config-if)# service-policy

interface.

 

output policy1

 

Step 14

 

 

end

Saves configuration changes.

 

or

When you issue the end command, the system prompts

 

 

 

commit

you to commit changes:

 

 

Uncommitted changes found, commit them before

 

Example:

exiting(yes/no/cancel)?

 

RP/0/RP0/CPU0:router(config-if)# end

[cancel]:

 

 

 

or

Entering yes saves configuration changes to the

 

RP/0/RP0/CPU0:router(config-if)# commit

 

running configuration file, exits the configuration

 

 

session, and returns the router to EXEC mode.

 

 

Entering no exits the configuration session and

 

 

returns the router to EXEC mode without

 

 

committing the configuration changes.

 

 

Entering cancel leaves the router in the current

 

 

configuration session without exiting or

 

 

committing the configuration changes.

 

 

Use the commit command to save the configuration

 

 

changes to the running configuration file and remain

 

 

within the configuration session.

Step 15

 

 

show policy-map interface type instance [input

(Optional) Displays policy configuration information for all

 

output]

classes configured for all service policies on the specified

 

 

interface.

 

Example:

 

 

RP/0/RP0/CPU0:router# show policy-map interface

 

 

POS 0/2/0/0

 

 

 

 

Configuring Low-Latency Queueing with Strict Priority Queueing

The priority command configures low-latency queueing (LLQ), providing strict priority queueing (PQ). Strict PQ allows delay-sensitive data, such as voice, to be dequeued and sent before packets in other queues are dequeued. When a class is marked as high priority using the priority command, we recommend that you configure a policer to limit the priority traffic. This configuration ensures that the priority traffic does not starve all of the other traffic on the line card, which protects low priority traffic from starvation. Use the police command to explicitly configure the policer.

Restrictions

Within a policy map, you can give one or more classes priority status. When multiple classes within a single policy map are configured as priority classes, all traffic from these classes is queued to the same single priority queue.

The bandwidth, priority, and shape average commands should not be configured together in the same class.

Cisco IOS XR Modular Quality of Service Configuration Guide

QC-40

Page 12
Image 12
Cisco Systems QC-29 manual QC-40

QC-29 specifications

Cisco Systems has long been recognized as a leading provider of networking solutions, and its QC-29 model is a testimony to this legacy. Designed to address the increasing demands for cloud integration, high bandwidth, and low-latency applications, the QC-29 is positioned as an ideal solution for both enterprise and service providers.

One of the standout features of the QC-29 is its robust architecture. Capable of handling extensive data processing, the model incorporates advanced computational power with a focus on efficiency. This architecture enables seamless support for various applications, making it suitable for data-intensive environments. The QC-29 supports multi-tenancy, allowing multiple users to operate independently on a single device, which is essential for modern data centers.

In terms of connectivity, the QC-29 is equipped with various high-speed interfaces. These include multiple 10/25/40/100 Gigabit Ethernet ports that facilitate rapid data transfer between systems, ensuring minimal latency. This connectivity not only enhances data throughput but also improves overall network reliability. The device supports both traditional and emerging protocols, ensuring versatility in deployment scenarios.

A significant technological advancement integrated within the QC-29 is its support for software-defined networking (SDN). This enables organizations to programmatically adjust their network configurations, leading to increased flexibility and optimized resource usage. Furthermore, the QC-29 is compatible with various cloud ecosystems, providing organizations with the ability to leverage cloud-based services efficiently.

Security is another critical characteristic of the QC-29. Cisco has embedded advanced security measures, including end-to-end encryption and network segmentation, ensuring protection against data breaches and cyber threats. As the landscape of cyber threats continues to evolve, these security features help organizations maintain compliance with stringent regulatory requirements.

Management and monitoring of the QC-29 are facilitated through Cisco's robust software tools. With an intuitive interface, IT teams can gain insights into network performance, identify potential issues, and make data-driven decisions quickly. Additionally, automation capabilities streamline operations, making it easier to manage complex networks.

Overall, the Cisco Systems QC-29 stands out due to its cutting-edge features, adaptability, and robust security, making it a valuable asset for organizations aiming to enhance their network infrastructure and meet the demands of the digital landscape.