1q8t Receive Queues, 42-35 | Cisco Systems OL-4266-08 manual

Chapter 42 Configuring PFC QoS

PFC QoS Default Configuration

1q8t Receive Queues

Feature			Default Value

Standard receive queue	Threshold 1	CoS	0

		Tail-drop	50%

		WRED-drop	Not supported

	Threshold 2	CoS	None

		Tail-drop	50%

		WRED-drop	Not supported

	Threshold 3	CoS	1, 2, 3, 4

		Tail-drop	60%

		WRED-drop	Not supported

	Threshold 4	CoS	None

		Tail-drop	60%

		WRED-drop	Not supported

	Threshold 5	CoS	6 and 7

		Tail-drop	80%

		WRED-drop	Not supported

	Threshold 6	CoS	None

		Tail-drop	80%

		WRED-drop	Not supported

	Threshold 7	CoS	5

		Tail-drop	100%

		WRED-drop	Not supported

	Threshold 8	CoS	None

		Tail-drop	100%

		WRED-drop	Not supported

	Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX

OL-4266-08		42-35
OL-4266-08		42-35

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Cisco Systems OL-4266-08 manual 1q8t Receive Queues, 42-35

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.

Contents

42-1 A P T E R 42-2 Port Types Supported by PFC QoSOverview 42-3 PFC QoS Feature Processing Overview 42-4 2shows traffic flow and PFC QoS features with a PFC3 42-5 3shows traffic flow and PFC QoS features with a PFC2 42-6 Ingress LAN Port PFC QoS FeaturesComponent Overview 42-7 Flowchart of Ingress LAN Port PFC QoS Features These sections describe PFCs and DFCs as they relate to QoS PFC and DFC QoS FeaturesPort Trust Ingress Congestion Avoidance Supported Distributed Forwarding Cards Supported Policy Feature CardsPFC and DFC QoS Feature List and Flowchart Feature Ingress PFC QoS 42-10 42-11 Internal Dscp ValuesInitial Internal Dscp Value Final Internal Dscp Value 42-12 PFC QoS Egress Port FeaturesThese sections describe PFC QoS egress port features Port-Based PFC QoS and VLAN-Based PFC QoS 42-13 Flowchart of PFC QoS Egress LAN Port FeaturesEgress CoS Values Egress ACL Support for Remarked Dscp Egress Dscp Mutation with a PFC3Egress ToS Byte Egress PFC QoS Interfaces 42-15 Marking on Egress OSM Ports 42-16 Understanding Classification and MarkingClassification and Marking at Untrusted Ingress Ports Ingress Classification and Marking at Trusted Ports 42-17 Classification and Marking at Ingress OSM PortsIngress Classification and Marking at Trust CoS LAN Ports Ingress Classification and Marking at Trust Dscp Ports 42-18 These sections describe policers PolicersClassification and Marking on the Msfc Overview of Policers 42-20 Aggregate Policers 42-21 Microflow Policers 42-22 Understanding Port-Based Queue TypesIngress and Egress Buffers and Layer 2 CoS-Based Queues 42-23 42-24 Ingress Queue Types 42-25 Egress Queue Types 42-26 Module to Queue Type MappingsIngress Egress Queue Drop 42-27 42-28 = CoS Egress CoS set from final internal Dscp values PFC QoS Global SettingsFollowing global PFC QoS settings apply Feature Default Value 42-30 Default Values With PFC QoS EnabledReceive-Queue Limits Transmit-Queue Limit s 42-31 Default Drop-Threshold Percentages and CoS Value MappingsBandwidth Allocation Ratios 42-32 1q2t Receive Queues1q4t Receive Queues 42-33 1p1q4t Receive Queues1p1q0t Receive Queues 42-34 1p1q8t Receive Queues 42-35 1q8t Receive Queues 42-36 2q8t Receive Queues 27, 29, 31, 33, 39, 41-45 8q4t Receive QueuesStandard receive queue Threshold CoS Lowest priority 11, 13, 15-17, 19, 21, 23 42-38 42-39 48-63 42-40 42-41 8q8t Receive Queues2q2t Transmit Queues 42-42 1p2q2t Transmit Queues 42-43 1p3q8t Transmit Queues 42-44 1p7q4t Transmit Queues 42-45 42-46 42-47 Tail-drop 100% nonconfigurable1p7q8t Transmit Queues 42-48 1p3q1t Transmit Queues 42-49 Default Values With PFC QoS Disabled1p2q1t Transmit Queues 42-50 General Guidelines 42-51 PFC3 GuidelinesWrr-queue bandwidth except Gigabit Ethernet LAN ports 42-52 PFC2 Guidelines Supported Granularity for CIR and PIR Rate Values Class Map Command RestrictionsPolicy Map Command Restrictions Policy Map Class Command Restrictions 42-54 Supported Granularity for CIR and PIR Token Bucket Sizes 42-55 IP Precedence and Dscp Values 42-56 Command PurposeEnabling PFC QoS Globally Enabling Ignore Port Trust Enables ignore port trust globally on the routerDisables ignore port trust globally on the router Default 42-58 Configuring Dscp TransparencyEnabling Queueing-Only Mode 42-59 Enabling Microflow Policing of Bridged Traffic 42-60 Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports 42-61 Enabling Egress ACL Support for Remarked DscpCreating Named Aggregate Policers 42-62 42-63 42-64 Configuring a PFC QoS PolicyThese sections describe PFC QoS policy configuration Yes 800 to Yes 900 to Supported only with PFC2 MAC Layer PFC QoS Policy Configuration OverviewProtocol Numbered ACLs Extended ACLs Named ACLs IPv4 Yes 100 to 1300 to 2000 to IPv6 Yes named 42-66 Configuring MAC ACLsConfiguring Protocol-Independent MAC ACL Filtering 42-67 Enabling VLAN-Based MAC QoS Filtering 42-68 Configuring MAC ACLs 42-69 Configuring ARP ACLs for QoS Filtering 42-70 Configuring a Class MapCreating a Class Map Class Map Filtering Guidelines and Restrictions Configuring Filtering in a Class MapOptional Configures the class map to filter using an ACL Clears the ACL configuration from the class map 42-72 Verifying Class Map Configuration To create a policy map, perform this task Configuring a Policy MapPolicy Map Class Configuration Guidelines and Restrictions Creating a Policy Map 42-74 Creating a Policy Map Class and Configuring FilteringConfiguring Policy Map Class Actions 42-75 Configuring Policy Map Class MarkingConfiguring the Policy Map Class Trust State 42-76 Configuring Policy Map Class PolicingUsing a Named Aggregate Policer Configuring a Per-Interface Policer 42-77 42-78 Additional classes in the policy map Verifying Policy Map ConfigurationTo verify policy map configuration, perform this task Exits policy map class configuration mode Removes the policy map from the interface Attaching a Policy Map to an InterfaceTo attach a policy map to an interface, perform this task Attaches a policy map to the interface Router# show policy-map interface fastethernet 5/36 42-81 42-82 Configuring Egress Dscp Mutation on a PFC3Configuring Named Dscp Mutation Maps To configure a named Dscp mutation map, perform this task 42-83 Attaching an Egress Dscp Mutation Map to an InterfaceAttaches an egress Dscp mutation map to the interface Removes the egress Dscp mutation map from 42-84 42-85 Configuring Ingress CoS Mutation Maps 42-86 Configuring Dscp Value MapsMapping Received CoS Values to Internal Dscp Values 42-87 Configuring Dscp Markdown ValuesConfigures a Dscp markdown map 42-88 42-89 Configures the internal Dscp to egress CoS mapMapping Internal Dscp Values to Egress CoS Values 42-90 Configuring the Trust State of Ethernet LAN and OSM PortsConfigures the trust state of the port Reverts to the default trust state untrusted 42-91 Configuring the Ingress LAN Port CoS Value 42-92 Configuring Standard-Queue Drop Threshold PercentagesConfigures the ingress LAN port CoS value Reverts to the default port CoS value 42-93 Configuring a Tail-Drop Receive Queue 42-94 Configuring a WRED-Drop Transmit QueueConfiguring a WRED-Drop and Tail-Drop Receive Queue 42-95 Configuring a WRED-Drop and Tail-Drop Transmit Queue 42-96 Configuring 1q4t/2q2t Tail-Drop Threshold Percentages 42-97 Configures the receive- and transmit-queue tail-dropReverts to the default receive- and transmit-queue Tail-drop thresholds 42-98 Configuring DSCP-Based Queue MappingMapping QoS Labels to Queues and Drop Thresholds 42-99 Configuring Ingress DSCP-Based Queue MappingConfiguring the Port to Trust Dscp Enabling DSCP-Based Queue Mapping 42-100 Reverts to the default mappingMapping Dscp Values to Standard Receive-Queue Thresholds Maps Dscp values to the standard receive queue 42-101 Queueing interface command 42-102 Mapping Dscp Values to Standard Transmit-Queue ThresholdsMaps Dscp values to a standard transmit-queue 42-103 Mapping Dscp Values to the Transmit Strict-Priority Queue 42-104 Configuring CoS-Based Queue MappingMapping CoS Values to Standard Receive-Queue Thresholds Maps CoS values to the standard receive queue 42-105 Mapping CoS Values to Standard Transmit-Queue ThresholdsMaps CoS values to a standard transmit-queue threshold 42-106 Mapping CoS Values to Strict-Priority QueuesMaps CoS values to the receive and transmit 42-107 Maps CoS values to a tail-drop threshold 42-108 Allocating Bandwidth Between Standard Transmit Queues 42-109 42-110 Setting the Receive-Queue Size RatioReverts to the default size ratio Sets the size ratio between the receive queues 42-111 Configuring the Transmit-Queue Size RatioConfigures the queue size ratio between transmit queues Configures the strict priority queue size 42-112 Access LayerDistribution and Core Interswitch Links Sample Network Design Overview 42-113 42-114 Identify the Voice Signaling Traffic from an IP Phone VvlanIdentify the Voice Traffic from an IP Phone Vvlan Identify the SAP Traffic from the PC Dvlan Set dscp ef 42-115 42-116 Accepting the Traffic Priority Value on Interswitch Links 42-117 Prioritizing Traffic on Interswitch Links 42-118 42-119 Voice Strict Priority Voice signaling Queue 2, ThresholdTraffic Type CoS from DSCP-to-CoS map Output Queue 42-120 Using Policers to Limit the Amount of Traffic from a PCClass map commands 42-121 To monitor the policing operation, use these commands 42-122 PFC QoS Glossary 42-123 42-124