1p1q4t Receive Queues, 42-33 | Cisco Systems OL-4266-08 specs

Chapter 42 Configuring PFC QoS

PFC QoS Default Configuration

1p1q4t Receive Queues

Feature			Default Value

Standard receive queue	Threshold 1	CoS	0 and 1

		Tail-drop	50%

		WRED-drop	Not supported

	Threshold 2	CoS	2 and 3

		Tail-drop	60%

		WRED-drop	Not supported

	Threshold 3	CoS	4

		Tail-drop	80%

		WRED-drop	Not supported

	Threshold 4	CoS	6 and 7

		Tail-drop	100%

		WRED-drop	Not supported

Strict-priority receive queue		CoS	5

		Tail-drop	100% (nonconfigurable)

1p1q0t Receive Queues

Feature		Default Value

Standard receive queue	CoS	0, 1, 2, 3, 4, 6, and 7

	Tail-drop	100% (nonconfigurable)

	WRED-drop	Not supported

Strict-priority receive queue	CoS	5

	Tail-drop	100% (nonconfigurable)

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

OL-4266-08		42-33
OL-4266-08		42-33

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Cisco Systems OL-4266-08 manual 1p1q4t Receive Queues, 1p1q0t Receive Queues, 42-33

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 Port Types Supported by PFC QoS Overview42-2 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 Ingress LAN Port PFC QoS Features Component Overview42-6 42-7 Flowchart of Ingress LAN Port PFC QoS Features Port Trust PFC and DFC QoS FeaturesIngress Congestion Avoidance These sections describe PFCs and DFCs as they relate to QoS PFC and DFC QoS Feature List and Flowchart Supported Policy Feature CardsFeature Supported Distributed Forwarding Cards Ingress PFC QoS 42-10 Initial Internal Dscp Value Internal Dscp ValuesFinal Internal Dscp Value 42-11 These sections describe PFC QoS egress port features PFC QoS Egress Port FeaturesPort-Based PFC QoS and VLAN-Based PFC QoS 42-12 Flowchart of PFC QoS Egress LAN Port Features Egress CoS Values42-13 Egress ToS Byte Egress Dscp Mutation with a PFC3Egress PFC QoS Interfaces Egress ACL Support for Remarked Dscp 42-15 Marking on Egress OSM Ports Classification and Marking at Untrusted Ingress Ports Understanding Classification and MarkingIngress Classification and Marking at Trusted Ports 42-16 Ingress Classification and Marking at Trust CoS LAN Ports Classification and Marking at Ingress OSM PortsIngress Classification and Marking at Trust Dscp Ports 42-17 42-18 Classification and Marking on the Msfc PolicersOverview of Policers These sections describe policers 42-20 Aggregate Policers 42-21 Microflow Policers Understanding Port-Based Queue Types Ingress and Egress Buffers and Layer 2 CoS-Based Queues42-22 42-23 42-24 Ingress Queue Types 42-25 Egress Queue Types Module to Queue Type Mappings Ingress Egress Queue Drop42-26 42-27 42-28 Following global PFC QoS settings apply PFC QoS Global SettingsFeature Default Value = CoS Egress CoS set from final internal Dscp values Receive-Queue Limits Default Values With PFC QoS EnabledTransmit-Queue Limit s 42-30 Default Drop-Threshold Percentages and CoS Value Mappings Bandwidth Allocation Ratios42-31 1q2t Receive Queues 1q4t Receive Queues42-32 1p1q4t Receive Queues 1p1q0t Receive Queues42-33 42-34 1p1q8t Receive Queues 42-35 1q8t Receive Queues 42-36 2q8t Receive Queues Standard receive queue Threshold CoS Lowest priority 8q4t Receive Queues11, 13, 15-17, 19, 21, 23 27, 29, 31, 33, 39, 41-45 42-38 42-39 48-63 42-40 8q8t Receive Queues 2q2t Transmit Queues42-41 42-42 1p2q2t Transmit Queues 42-43 1p3q8t Transmit Queues 42-44 1p7q4t Transmit Queues 42-45 42-46 Tail-drop 100% nonconfigurable 1p7q8t Transmit Queues42-47 42-48 1p3q1t Transmit Queues Default Values With PFC QoS Disabled 1p2q1t Transmit Queues42-49 42-50 General Guidelines PFC3 Guidelines Wrr-queue bandwidth except Gigabit Ethernet LAN ports42-51 42-52 PFC2 Guidelines Policy Map Command Restrictions Class Map Command RestrictionsPolicy Map Class Command Restrictions Supported Granularity for CIR and PIR Rate Values 42-54 Supported Granularity for CIR and PIR Token Bucket Sizes 42-55 IP Precedence and Dscp Values Command Purpose Enabling PFC QoS Globally42-56 Disables ignore port trust globally on the router Enables ignore port trust globally on the routerDefault Enabling Ignore Port Trust Configuring Dscp Transparency Enabling Queueing-Only Mode42-58 42-59 Enabling Microflow Policing of Bridged Traffic 42-60 Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports Enabling Egress ACL Support for Remarked Dscp Creating Named Aggregate Policers42-61 42-62 42-63 Configuring a PFC QoS Policy These sections describe PFC QoS policy configuration42-64 Protocol Numbered ACLs Extended ACLs Named ACLs PFC QoS Policy Configuration OverviewIPv4 Yes 100 to 1300 to 2000 to IPv6 Yes named Yes 800 to Yes 900 to Supported only with PFC2 MAC Layer Configuring MAC ACLs Configuring Protocol-Independent MAC ACL Filtering42-66 42-67 Enabling VLAN-Based MAC QoS Filtering 42-68 Configuring MAC ACLs 42-69 Configuring ARP ACLs for QoS Filtering Configuring a Class Map Creating a Class Map42-70 Optional Configures the class map to filter using an ACL Configuring Filtering in a Class MapClears the ACL configuration from the class map Class Map Filtering Guidelines and Restrictions 42-72 Verifying Class Map Configuration Policy Map Class Configuration Guidelines and Restrictions Configuring a Policy MapCreating a Policy Map To create a policy map, perform this task Creating a Policy Map Class and Configuring Filtering Configuring Policy Map Class Actions42-74 Configuring Policy Map Class Marking Configuring the Policy Map Class Trust State42-75 Using a Named Aggregate Policer Configuring Policy Map Class PolicingConfiguring a Per-Interface Policer 42-76 42-77 42-78 To verify policy map configuration, perform this task Verifying Policy Map ConfigurationExits policy map class configuration mode Additional classes in the policy map To attach a policy map to an interface, perform this task Attaching a Policy Map to an InterfaceAttaches a policy map to the interface Removes the policy map from the interface Router# show policy-map interface fastethernet 5/36 42-81 Configuring Named Dscp Mutation Maps Configuring Egress Dscp Mutation on a PFC3To configure a named Dscp mutation map, perform this task 42-82 Attaches an egress Dscp mutation map to the interface Attaching an Egress Dscp Mutation Map to an InterfaceRemoves the egress Dscp mutation map from 42-83 42-84 42-85 Configuring Ingress CoS Mutation Maps Configuring Dscp Value Maps Mapping Received CoS Values to Internal Dscp Values42-86 Configuring Dscp Markdown Values Configures a Dscp markdown map42-87 42-88 Configures the internal Dscp to egress CoS map Mapping Internal Dscp Values to Egress CoS Values42-89 Configures the trust state of the port Configuring the Trust State of Ethernet LAN and OSM PortsReverts to the default trust state untrusted 42-90 42-91 Configuring the Ingress LAN Port CoS Value Configures the ingress LAN port CoS value Configuring Standard-Queue Drop Threshold PercentagesReverts to the default port CoS value 42-92 42-93 Configuring a Tail-Drop Receive Queue Configuring a WRED-Drop Transmit Queue Configuring a WRED-Drop and Tail-Drop Receive Queue42-94 42-95 Configuring a WRED-Drop and Tail-Drop Transmit Queue 42-96 Configuring 1q4t/2q2t Tail-Drop Threshold Percentages Reverts to the default receive- and transmit-queue Configures the receive- and transmit-queue tail-dropTail-drop thresholds 42-97 Configuring DSCP-Based Queue Mapping Mapping QoS Labels to Queues and Drop Thresholds42-98 Configuring the Port to Trust Dscp Configuring Ingress DSCP-Based Queue MappingEnabling DSCP-Based Queue Mapping 42-99 Mapping Dscp Values to Standard Receive-Queue Thresholds Reverts to the default mappingMaps Dscp values to the standard receive queue 42-100 42-101 Queueing interface command Mapping Dscp Values to Standard Transmit-Queue Thresholds Maps Dscp values to a standard transmit-queue42-102 42-103 Mapping Dscp Values to the Transmit Strict-Priority Queue Mapping CoS Values to Standard Receive-Queue Thresholds Configuring CoS-Based Queue MappingMaps CoS values to the standard receive queue 42-104 Mapping CoS Values to Standard Transmit-Queue Thresholds Maps CoS values to a standard transmit-queue threshold42-105 Mapping CoS Values to Strict-Priority Queues Maps CoS values to the receive and transmit42-106 42-107 Maps CoS values to a tail-drop threshold 42-108 Allocating Bandwidth Between Standard Transmit Queues 42-109 Reverts to the default size ratio Setting the Receive-Queue Size RatioSets the size ratio between the receive queues 42-110 Configures the queue size ratio between transmit queues Configuring the Transmit-Queue Size RatioConfigures the strict priority queue size 42-111 Distribution and Core Interswitch Links Access LayerSample Network Design Overview 42-112 42-113 Identify the Voice Traffic from an IP Phone Vvlan Identify the Voice Signaling Traffic from an IP Phone VvlanIdentify the SAP Traffic from the PC Dvlan 42-114 Set dscp ef 42-115 42-116 Accepting the Traffic Priority Value on Interswitch Links 42-117 Prioritizing Traffic on Interswitch Links 42-118 Traffic Type Voice Strict Priority Voice signaling Queue 2, ThresholdCoS from DSCP-to-CoS map Output Queue 42-119 Using Policers to Limit the Amount of Traffic from a PC Class map commands42-120 42-121 To monitor the policing operation, use these commands 42-122 PFC QoS Glossary 42-123 42-124