QoS Configuration on Cisco Device | DSCP, Traffic Policing | Lab with GNS3 and Ostinato | CCNA, CCNP

Summary

In this video, the presenter demonstrates traffic shaping and Quality of Service (QoS) configurations on a network router. They walk through setting up a policy to limit bandwidth to 40 kilobits per second, showing real-time packet drops and the impact on transmission rates. The importance of proper queuing mechanisms is highlighted, with FIFO being used in this scenario. The video also touches on alternatives like GNS3 and Packet Tracer for simulating these setups. Viewers are encouraged to engage with the content and follow for future updates on networking concepts.

Takeaways

• 😀 Traffic policing is configured on a router interface to manage bandwidth effectively.
• 📊 The target bandwidth limit was set at 40 kilobits per second.
• 📉 Packet drops were observed immediately after applying the bandwidth limit, indicating traffic exceeding the configured rate.
• 📞 Voice traffic is prioritized over other types, leading to significant drops in ICMP packets.
• ⚙️ The queuing mechanism in use is FIFO (First In, First Out), suitable for handling the current traffic types.
• 🚦 The rate of traffic stabilized at around 38 kilobits per second after adjustments were made.
• 🔧 Tools like Cisco GNS3 and Packet Tracer are useful for simulating networking scenarios and testing configurations.
• 📅 The video emphasizes the importance of going beyond basic requirements for a deeper understanding of QoS.
• 💡 The presenter encourages viewers to engage by liking and subscribing for more networking content.
• 🌐 Following the presenter on social media is suggested to stay updated with future videos and learning resources.

Q & A

What is the main focus of the video?

The video primarily focuses on configuring Quality of Service (QoS) principles in a Cisco network environment, particularly as part of the CCNA 200-301 course.

What tools does the instructor use for the lab setup?

The instructor uses GNS3 for network simulation and Ostinato, a packet generation tool, to simulate traffic between devices.

What specific QoS concepts are discussed in the video?

The instructor discusses several QoS concepts, including classification, marking, congestion management, queuing, traffic shaping, and traffic policing.

Why does the instructor emphasize practical experience in QoS configuration?

Although Cisco does not require practical configuration for certification, the instructor emphasizes hands-on experience to enhance understanding of QoS beyond theoretical knowledge.

What commands are used to configure traffic policing on the gigabit interface?

The commands used include entering interface configuration mode, applying a service policy with a specified policy map for policing, and adjusting the output rate.

What was the target transmission rate set by the instructor?

The target transmission rate set by the instructor was approximately 40 kilobits per second.

What observation does the instructor make regarding packet loss?

The instructor notes that packets are being dropped due to bandwidth limitations, indicating that the transmission rate must be regulated to meet the QoS requirements.

What type of traffic is prioritized in the network setup?

Voice traffic is prioritized in the setup, with the instructor noting that it dominates over ICMP due to its higher priority in the QoS configuration.

What queuing mechanism is identified by the instructor?

The instructor identifies that a FIFO (First In, First Out) queuing mechanism is being used, which impacts how packets are managed in the queue.

What resources does the instructor suggest for further learning?

The instructor suggests visiting cabletrans.com for more comprehensive training and encourages viewers to like and subscribe for future video content.