A P T E R
42-1
Port Types Supported by PFC QoS
Overview
42-2
PFC QoS Feature Processing Overview
42-3
2shows traffic flow and PFC QoS features with a PFC3
42-4
3shows traffic flow and PFC QoS features with a PFC2
42-5
Ingress LAN Port PFC QoS Features
Component Overview
42-6
Flowchart of Ingress LAN Port PFC QoS Features
42-7
Ingress Congestion Avoidance
PFC and DFC QoS Features
Port Trust
These sections describe PFCs and DFCs as they relate to QoS
Feature
Supported Policy Feature Cards
PFC and DFC QoS Feature List and Flowchart
Supported Distributed Forwarding Cards
42-10
Ingress PFC QoS
Final Internal Dscp Value
Internal Dscp Values
Initial Internal Dscp Value
42-11
Port-Based PFC QoS and VLAN-Based PFC QoS
PFC QoS Egress Port Features
These sections describe PFC QoS egress port features
42-12
Flowchart of PFC QoS Egress LAN Port Features
Egress CoS Values
42-13
Egress PFC QoS Interfaces
Egress Dscp Mutation with a PFC3
Egress ToS Byte
Egress ACL Support for Remarked Dscp
Marking on Egress OSM Ports
42-15
Ingress Classification and Marking at Trusted Ports
Understanding Classification and Marking
Classification and Marking at Untrusted Ingress Ports
42-16
Ingress Classification and Marking at Trust Dscp Ports
Classification and Marking at Ingress OSM Ports
Ingress Classification and Marking at Trust CoS LAN Ports
42-17
42-18
Overview of Policers
Policers
Classification and Marking on the Msfc
These sections describe policers
Aggregate Policers
42-20
Microflow Policers
42-21
Understanding Port-Based Queue Types
Ingress and Egress Buffers and Layer 2 CoS-Based Queues
42-22
42-23
Ingress Queue Types
42-24
Egress Queue Types
42-25
Module to Queue Type Mappings
Ingress Egress Queue Drop
42-26
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42-28
Feature Default Value
PFC QoS Global Settings
Following global PFC QoS settings apply
= CoS Egress CoS set from final internal Dscp values
Transmit-Queue Limit s
Default Values With PFC QoS Enabled
Receive-Queue Limits
42-30
Default Drop-Threshold Percentages and CoS Value Mappings
Bandwidth Allocation Ratios
42-31
1q2t Receive Queues
1q4t Receive Queues
42-32
1p1q4t Receive Queues
1p1q0t Receive Queues
42-33
1p1q8t Receive Queues
42-34
1q8t Receive Queues
42-35
2q8t Receive Queues
42-36
11, 13, 15-17, 19, 21, 23
8q4t Receive Queues
Standard receive queue Threshold CoS Lowest priority
27, 29, 31, 33, 39, 41-45
42-38
48-63
42-39
42-40
8q8t Receive Queues
2q2t Transmit Queues
42-41
1p2q2t Transmit Queues
42-42
1p3q8t Transmit Queues
42-43
1p7q4t Transmit Queues
42-44
42-45
42-46
Tail-drop 100% nonconfigurable
1p7q8t Transmit Queues
42-47
1p3q1t Transmit Queues
42-48
Default Values With PFC QoS Disabled
1p2q1t Transmit Queues
42-49
General Guidelines
42-50
PFC3 Guidelines
Wrr-queue bandwidth except Gigabit Ethernet LAN ports
42-51
PFC2 Guidelines
42-52
Policy Map Class Command Restrictions
Class Map Command Restrictions
Policy Map Command Restrictions
Supported Granularity for CIR and PIR Rate Values
Supported Granularity for CIR and PIR Token Bucket Sizes
42-54
IP Precedence and Dscp Values
42-55
Command Purpose
Enabling PFC QoS Globally
42-56
Default
Enables ignore port trust globally on the router
Disables ignore port trust globally on the router
Enabling Ignore Port Trust
Configuring Dscp Transparency
Enabling Queueing-Only Mode
42-58
Enabling Microflow Policing of Bridged Traffic
42-59
Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports
42-60
Enabling Egress ACL Support for Remarked Dscp
Creating Named Aggregate Policers
42-61
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42-63
Configuring a PFC QoS Policy
These sections describe PFC QoS policy configuration
42-64
IPv4 Yes 100 to 1300 to 2000 to IPv6 Yes named
PFC QoS Policy Configuration Overview
Protocol Numbered ACLs Extended ACLs Named ACLs
Yes 800 to Yes 900 to Supported only with PFC2 MAC Layer
Configuring MAC ACLs
Configuring Protocol-Independent MAC ACL Filtering
42-66
Enabling VLAN-Based MAC QoS Filtering
42-67
Configuring MAC ACLs
42-68
Configuring ARP ACLs for QoS Filtering
42-69
Configuring a Class Map
Creating a Class Map
42-70
Clears the ACL configuration from the class map
Configuring Filtering in a Class Map
Optional Configures the class map to filter using an ACL
Class Map Filtering Guidelines and Restrictions
Verifying Class Map Configuration
42-72
Creating a Policy Map
Configuring a Policy Map
Policy Map Class Configuration Guidelines and Restrictions
To create a policy map, perform this task
Creating a Policy Map Class and Configuring Filtering
Configuring Policy Map Class Actions
42-74
Configuring Policy Map Class Marking
Configuring the Policy Map Class Trust State
42-75
Configuring a Per-Interface Policer
Configuring Policy Map Class Policing
Using a Named Aggregate Policer
42-76
42-77
42-78
Exits policy map class configuration mode
Verifying Policy Map Configuration
To verify policy map configuration, perform this task
Additional classes in the policy map
Attaches a policy map to the interface
Attaching a Policy Map to an Interface
To attach a policy map to an interface, perform this task
Removes the policy map from the interface
42-81
Router# show policy-map interface fastethernet 5/36
To configure a named Dscp mutation map, perform this task
Configuring Egress Dscp Mutation on a PFC3
Configuring Named Dscp Mutation Maps
42-82
Removes the egress Dscp mutation map from
Attaching an Egress Dscp Mutation Map to an Interface
Attaches an egress Dscp mutation map to the interface
42-83
42-84
Configuring Ingress CoS Mutation Maps
42-85
Configuring Dscp Value Maps
Mapping Received CoS Values to Internal Dscp Values
42-86
Configuring Dscp Markdown Values
Configures a Dscp markdown map
42-87
42-88
Configures the internal Dscp to egress CoS map
Mapping Internal Dscp Values to Egress CoS Values
42-89
Reverts to the default trust state untrusted
Configuring the Trust State of Ethernet LAN and OSM Ports
Configures the trust state of the port
42-90
Configuring the Ingress LAN Port CoS Value
42-91
Reverts to the default port CoS value
Configuring Standard-Queue Drop Threshold Percentages
Configures the ingress LAN port CoS value
42-92
Configuring a Tail-Drop Receive Queue
42-93
Configuring a WRED-Drop Transmit Queue
Configuring a WRED-Drop and Tail-Drop Receive Queue
42-94
Configuring a WRED-Drop and Tail-Drop Transmit Queue
42-95
Configuring 1q4t/2q2t Tail-Drop Threshold Percentages
42-96
Tail-drop thresholds
Configures the receive- and transmit-queue tail-drop
Reverts to the default receive- and transmit-queue
42-97
Configuring DSCP-Based Queue Mapping
Mapping QoS Labels to Queues and Drop Thresholds
42-98
Enabling DSCP-Based Queue Mapping
Configuring Ingress DSCP-Based Queue Mapping
Configuring the Port to Trust Dscp
42-99
Maps Dscp values to the standard receive queue
Reverts to the default mapping
Mapping Dscp Values to Standard Receive-Queue Thresholds
42-100
Queueing interface command
42-101
Mapping Dscp Values to Standard Transmit-Queue Thresholds
Maps Dscp values to a standard transmit-queue
42-102
Mapping Dscp Values to the Transmit Strict-Priority Queue
42-103
Maps CoS values to the standard receive queue
Configuring CoS-Based Queue Mapping
Mapping CoS Values to Standard Receive-Queue Thresholds
42-104
Mapping CoS Values to Standard Transmit-Queue Thresholds
Maps CoS values to a standard transmit-queue threshold
42-105
Mapping CoS Values to Strict-Priority Queues
Maps CoS values to the receive and transmit
42-106
Maps CoS values to a tail-drop threshold
42-107
Allocating Bandwidth Between Standard Transmit Queues
42-108
42-109
Sets the size ratio between the receive queues
Setting the Receive-Queue Size Ratio
Reverts to the default size ratio
42-110
Configures the strict priority queue size
Configuring the Transmit-Queue Size Ratio
Configures the queue size ratio between transmit queues
42-111
Sample Network Design Overview
Access Layer
Distribution and Core Interswitch Links
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Identify the SAP Traffic from the PC Dvlan
Identify the Voice Signaling Traffic from an IP Phone Vvlan
Identify the Voice Traffic from an IP Phone Vvlan
42-114
42-115
Set dscp ef
Accepting the Traffic Priority Value on Interswitch Links
42-116
Prioritizing Traffic on Interswitch Links
42-117
42-118
CoS from DSCP-to-CoS map Output Queue
Voice Strict Priority Voice signaling Queue 2, Threshold
Traffic Type
42-119
Using Policers to Limit the Amount of Traffic from a PC
Class map commands
42-120
To monitor the policing operation, use these commands
42-121
PFC QoS Glossary
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