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Cisco Systems OL-4266-08 PFC QoS Global Settings, Following global PFC QoS settings apply, 42-29

Models: OL-4266-08

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Chapter 42 Configuring PFC QoS

PFC QoS Default Configuration

PFC QoS Global Settings

The following global PFC QoS settings apply:

Feature	Default Value

PFC QoS global enable state	Disabled

PFC QoS port enable state	Enabled when PFC QoS is globally enabled

Port CoS value	0

Microflow policing	Enabled

IntraVLAN microflow policing	Disabled

Port-based or VLAN-based PFC QoS	Port-based

Received CoS to initial internal DSCP map	CoS 0 = DSCP		0
(initial internal DSCP set from received CoS values)	CoS 1 = DSCP		8
	CoS 2 = DSCP 16
	CoS 3 = DSCP 24
	CoS 4 = DSCP 32
	CoS 5 = DSCP 40
	CoS 6 = DSCP 48
	CoS 7 = DSCP 56

Received IP precedence to initial internal DSCP map	IP precedence 0 = DSCP			0
(initial internal DSCP set from received IP	IP precedence 1 = DSCP			8
precedence values)	IP precedence 2 = DSCP 16
	IP precedence 3 = DSCP 24
	IP precedence 4 = DSCP 32
	IP precedence 5 = DSCP 40
	IP precedence 6 = DSCP 48
	IP precedence 7 = DSCP 56

Final internal DSCP to egress CoS map	DSCP	0–7 = CoS 0
(egress CoS set from final internal DSCP values)	DSCP	8–15 = CoS 1
	DSCP 16–23 = CoS 2
	DSCP 24–31 = CoS 3
	DSCP 32–39 = CoS 4
	DSCP 40–47 = CoS 5
	DSCP 48–55 = CoS 6
	DSCP 56–63 = CoS 7

Marked-down DSCP from DSCP map	Marked-down DSCP value equals original
	DSCP value (no markdown)

Policers	None

Policy maps	None

Protocol-independent MAC ACL filtering	Disabled

VLAN-based MAC ACL QoS filtering	Disabled

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

	OL-4266-08			42-29
	OL-4266-08			42-29

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Cisco Systems OL-4266-08 PFC QoS Global Settings, Following global PFC QoS settings apply, Feature Default Value, 42-29

Contents

42-1 A P T E R42-2 Port Types Supported by PFC QoSOverview 42-3 PFC QoS Feature Processing Overview42-4 2shows traffic flow and PFC QoS features with a PFC342-5 3shows traffic flow and PFC QoS features with a PFC242-6 Ingress LAN Port PFC QoS FeaturesComponent Overview 42-7 Flowchart of Ingress LAN Port PFC QoS FeaturesPort Trust PFC and DFC QoS FeaturesIngress Congestion Avoidance These sections describe PFCs and DFCs as they relate to QoSPFC and DFC QoS Feature List and Flowchart Supported Policy Feature CardsFeature Supported Distributed Forwarding CardsIngress PFC QoS 42-10Initial Internal Dscp Value Internal Dscp ValuesFinal Internal Dscp Value 42-11These sections describe PFC QoS egress port features PFC QoS Egress Port FeaturesPort-Based PFC QoS and VLAN-Based PFC QoS 42-1242-13 Flowchart of PFC QoS Egress LAN Port FeaturesEgress CoS Values Egress ToS Byte Egress Dscp Mutation with a PFC3Egress PFC QoS Interfaces Egress ACL Support for Remarked Dscp42-15 Marking on Egress OSM PortsClassification and Marking at Untrusted Ingress Ports Understanding Classification and MarkingIngress Classification and Marking at Trusted Ports 42-16Ingress Classification and Marking at Trust CoS LAN Ports Classification and Marking at Ingress OSM PortsIngress Classification and Marking at Trust Dscp Ports 42-1742-18 Classification and Marking on the Msfc PolicersOverview of Policers These sections describe policers42-20 Aggregate Policers42-21 Microflow Policers42-22 Understanding Port-Based Queue TypesIngress and Egress Buffers and Layer 2 CoS-Based Queues 42-23 42-24 Ingress Queue Types42-25 Egress Queue Types42-26 Module to Queue Type MappingsIngress Egress Queue Drop 42-27 42-28 Following global PFC QoS settings apply PFC QoS Global SettingsFeature Default Value = CoS Egress CoS set from final internal Dscp valuesReceive-Queue Limits Default Values With PFC QoS EnabledTransmit-Queue Limit s 42-3042-31 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 Queues42-35 1q8t Receive Queues42-36 2q8t Receive QueuesStandard receive queue Threshold CoS Lowest priority 8q4t Receive Queues11, 13, 15-17, 19, 21, 23 27, 29, 31, 33, 39, 41-4542-38 42-39 48-6342-40 42-41 8q8t Receive Queues2q2t Transmit Queues 42-42 1p2q2t Transmit Queues42-43 1p3q8t Transmit Queues42-44 1p7q4t Transmit Queues42-45 42-46 48-6342-47 Tail-drop 100% nonconfigurable1p7q8t Transmit Queues 42-48 1p3q1t Transmit Queues42-49 Default Values With PFC QoS Disabled1p2q1t Transmit Queues 42-50 General Guidelines42-51 PFC3 GuidelinesWrr-queue bandwidth except Gigabit Ethernet LAN ports 42-52 PFC2 GuidelinesPolicy Map Command Restrictions Class Map Command RestrictionsPolicy Map Class Command Restrictions Supported Granularity for CIR and PIR Rate Values42-54 Supported Granularity for CIR and PIR Token Bucket Sizes42-55 IP Precedence and Dscp Values42-56 Command PurposeEnabling PFC QoS Globally Disables ignore port trust globally on the router Enables ignore port trust globally on the routerDefault Enabling Ignore Port Trust42-58 Configuring Dscp TransparencyEnabling Queueing-Only Mode 42-59 Enabling Microflow Policing of Bridged Traffic42-60 Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports42-61 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 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 Layer42-66 Configuring MAC ACLsConfiguring Protocol-Independent MAC ACL Filtering 42-67 Enabling VLAN-Based MAC QoS Filtering42-68 Configuring MAC ACLs42-69 Configuring ARP ACLs for QoS Filtering42-70 Configuring a Class MapCreating a Class Map 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 Restrictions42-72 Verifying Class Map ConfigurationPolicy Map Class Configuration Guidelines and Restrictions Configuring a Policy MapCreating a Policy Map To create a policy map, perform this task42-74 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 Using a Named Aggregate Policer Configuring Policy Map Class PolicingConfiguring a Per-Interface Policer 42-7642-77 42-78 To verify policy map configuration, perform this task Verifying Policy Map ConfigurationExits policy map class configuration mode Additional classes in the policy mapTo 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 interfaceRouter# show policy-map interface fastethernet 5/36 42-81Configuring Named Dscp Mutation Maps Configuring Egress Dscp Mutation on a PFC3To configure a named Dscp mutation map, perform this task 42-82Attaches an egress Dscp mutation map to the interface Attaching an Egress Dscp Mutation Map to an InterfaceRemoves the egress Dscp mutation map from 42-8342-84 42-85 Configuring Ingress CoS Mutation Maps42-86 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 Configures the trust state of the port Configuring the Trust State of Ethernet LAN and OSM PortsReverts to the default trust state untrusted 42-9042-91 Configuring the Ingress LAN Port CoS ValueConfigures the ingress LAN port CoS value Configuring Standard-Queue Drop Threshold PercentagesReverts to the default port CoS value 42-9242-93 Configuring a Tail-Drop Receive Queue42-94 Configuring a WRED-Drop Transmit QueueConfiguring a WRED-Drop and Tail-Drop Receive Queue 42-95 Configuring a WRED-Drop and Tail-Drop Transmit Queue42-96 Configuring 1q4t/2q2t Tail-Drop Threshold PercentagesReverts to the default receive- and transmit-queue Configures the receive- and transmit-queue tail-dropTail-drop thresholds 42-9742-98 Configuring DSCP-Based Queue MappingMapping QoS Labels to Queues and Drop Thresholds Configuring the Port to Trust Dscp Configuring Ingress DSCP-Based Queue MappingEnabling DSCP-Based Queue Mapping 42-99Mapping Dscp Values to Standard Receive-Queue Thresholds Reverts to the default mappingMaps Dscp values to the standard receive queue 42-10042-101 Queueing interface command42-102 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 QueueMapping CoS Values to Standard Receive-Queue Thresholds Configuring CoS-Based Queue MappingMaps CoS values to the standard receive queue 42-10442-105 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 threshold42-108 Allocating Bandwidth Between Standard Transmit Queues42-109 Reverts to the default size ratio Setting the Receive-Queue Size RatioSets the size ratio between the receive queues 42-110Configures the queue size ratio between transmit queues Configuring the Transmit-Queue Size RatioConfigures the strict priority queue size 42-111Distribution and Core Interswitch Links Access LayerSample Network Design Overview 42-11242-113 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 42-114Set dscp ef 42-11542-116 Accepting the Traffic Priority Value on Interswitch Links42-117 Prioritizing Traffic on Interswitch Links42-118 Traffic Type Voice Strict Priority Voice signaling Queue 2, ThresholdCoS from DSCP-to-CoS map Output Queue 42-11942-120 Using Policers to Limit the Amount of Traffic from a PCClass map commands 42-121 To monitor the policing operation, use these commands42-122 PFC QoS Glossary42-123 42-124