Setting the Receive-Queue Size Ratio

Chapter 42 Configuring PFC QoS

Configuring PFC QoS

You can set the size ratio between the standard receive queues on 2q8t, 8q4t, and 8q8t ports and between the strict-priority and standard receive queues on 1p1q0t or 1p1q8t ports.

To set the size ratio between the receive queues, perform this task:

	Command	Purpose
Step 1
Step 1	Router(config)# interface {fastethernet	Selects the interface to configure.
	tengigabitethernet} slot/port
Step 2
Step 2	Router(config-if)#rcv-queue queue-limit	Sets the size ratio between the receive queues.
	low_priority_queue_weight
	[intermediate_priority_queue_weights]
	high_priority_queue_weight
	Or:
	Router(config-if)#rcv-queue queue-limit
	standard_queue_weight
	strict_priority_queue_weight
	Router(config-if)#no rcv-queue queue-limit	Reverts to the default size ratio.
Step 3
Step 3	Router(config-if)# end	Exits configuration mode.
Step 4
Step 4	Router# show queueing interface {fastethernet	Verifies the configuration.
	tengigabitethernet} slot/port

When setting the receive-queue size ratio, note the following information:

•The rcv-queuequeue-limitcommand configures ports on a per-ASIC basis.

•Estimate the mix of differing priority traffic on your network (for example, 80 percent standard traffic and 20 percent strict-priority traffic).

•Use the estimated percentages as queue weights.

•Valid values are from 1 to 100 percent, except on 1p1q8t ports, where valid values for the strict priority queue are from 3 to 100 percent.

This example shows how to set the receive-queue size ratio for Fast Ethernet port 2/2:

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)# interface fastethernet 2/2

Router(config-if)#rcv-queue queue-limit 75 15

Router(config-if)# end

Router#

This example shows how to verify the configuration:

Router# show queueing interface fastethernet 2/2 include queue-limit

queue-limit ratios: 75[queue 1] 15[queue 2] Router#

	Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
42-110	OL-4266-08

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.

Cisco Systems OL-4266-08 Setting the Receive-Queue Size Ratio, Reverts to the default size ratio

Models: OL-4266-08