Chapter 42 Configuring PFC QoS

Configuring PFC QoS

•The valid range of values for the pir bits_per_second parameter is as follows:

–Minimum—32 kilobits per second, entered as 32000 (the value cannot be smaller than the CIR bits_per_second parameters)

–Maximum with Release 12.2(18)SXE and later releases:

10 gigabits per second, entered as 10000000000

–Maximum with releases earlier than Release 12.2(18)SXE:

4 gigabits per second, entered as 4000000000

•(Optional) You can specify a conform action for matched in-profile traffic as follows:

–The default conform action is transmit, which sets the policy map class trust state to trust DSCP unless the policy map class contains a trust command.

–To set PFC QoS labels in untrusted traffic, enter the set-dscp-transmitkeyword to mark matched untrusted traffic with a new DSCP value or enter the set-prec-transmitkeyword to mark matched untrusted traffic with a new IP precedence value. The set-dscp-transmitand set-prec-transmitkeywords are only supported for IP traffic. PFC QoS sets egress ToS and CoS from the configured value.

–Enter the drop keyword to drop all matched traffic.

Note When you configure drop as the conform action, PFC QoS configures drop as the exceed action and the violate action.

•(Optional) For traffic that exceeds the CIR, you can specify an exceed action as follows:

–The default exceed action is drop, except with a maximum_burst_bytes parameter (drop is not supported with a maximum_burst_bytes parameter).

Note When the exceed action is drop, PFC QoS ignores any configured violate action.

–Enter the policed-dscp-transmitkeyword to cause all matched out-of-profile traffic to be marked down as specified in the markdown map.

Note When you create a policer that does not use the pir keyword and the maximum_burst_bytes parameter is equal to the normal_burst_bytes parameter (which is the case if you do not enter the maximum_burst_bytes parameter), the exceed-actionpoliced-dscp-transmitkeywords cause PFC QoS to mark traffic down as defined by the policed-dscpmax-burstmarkdown map.

•(Optional) For traffic that exceeds the PIR, you can specify a violate action as follows:

–To mark traffic without policing, enter the transmit keyword to transmit all matched out-of-profile traffic.

–The default violate action is equal to the exceed action.

–Enter the policed-dscp-transmitkeyword to cause all matched out-of-profile traffic to be marked down as specified in the markdown map.

–For marking without policing, enter the transmit keyword to transmit all matched out-of-profile traffic.

 

 

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OL-4266-08 specifications

Cisco Systems OL-4266-08 is a robust and versatile certification that focuses on the essentials of implementing and troubleshooting Cisco collaborations solutions. As enterprises increasingly rely on unified communications, having professionals who are knowledgeable in the latest Cisco technologies becomes a necessity. This certification is part of the Cisco Certified Network Associate (CCNA) program, which serves as a foundational stepping stone for individuals aspiring to build a career in networking and collaboration technologies.

One of the main features of OL-4266-08 is its emphasis on collaboration foundations, which includes an understanding of voice, video, messaging, and conferencing technologies. Professionals who obtain this certification demonstrate proficiency in deploying, configuring, and troubleshooting Cisco collaboration solutions like Cisco Unified Communications Manager and Cisco Webex. This knowledge is critical as businesses seek to enhance communication and productivity through integrated systems.

Technologically, OL-4266-08 covers a wide array of essential concepts, including IP telephony, voicemail, and collaborative tools. Candidates learn about the architecture of unified collaboration systems, involving integration with routing and switching networks. Additionally, it delves into security protocols to ensure secure transmissions of voice and video data, thereby protecting sensitive corporate communication.

In terms of characteristics, OL-4266-08 is designed to be both comprehensive and practical. The certification emphasizes hands-on experience, which is essential for understanding real-world applications of Cisco technologies. The coursework provides extensive exposure to simulations and labs that mimic actual network environments. This hands-on approach enables candidates to troubleshoot issues effectively using Cisco's troubleshooting tools and methodologies.

Moreover, the certification aligns with industry standards, ensuring that individuals gain relevant and in-demand skills. Given the evolving landscape of network technologies, OL-4266-08 prepares individuals for future growth and specialization in various areas, including cloud collaboration and Internet of Things (IoT) communications.

In conclusion, Cisco Systems OL-4266-08 equips networking professionals with the necessary skills to implement and support Cisco collaboration solutions. The focus on hands-on experience, along with in-depth coverage of technology and security protocols, makes it a valuable certification in the fast-paced world of network communications. With the rise of remote work and digital collaboration, this certification is pivotal for anyone looking to enhance their career in networking and technology.
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