A P T E R
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Port Types Supported by PFC QoS
Overview
PFC QoS Feature Processing Overview
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2shows traffic flow and PFC QoS features with a PFC3
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3shows traffic flow and PFC QoS features with a PFC2
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Ingress LAN Port PFC QoS Features
Component Overview
Flowchart of Ingress LAN Port PFC QoS Features
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PFC and DFC QoS Features
Port Trust
Ingress Congestion Avoidance
These sections describe PFCs and DFCs as they relate to QoS
Supported Policy Feature Cards
PFC and DFC QoS Feature List and Flowchart
Feature
Supported Distributed Forwarding Cards
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Ingress PFC QoS
Internal Dscp Values
Initial Internal Dscp Value
Final Internal Dscp Value
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PFC QoS Egress Port Features
These sections describe PFC QoS egress port features
Port-Based PFC QoS and VLAN-Based PFC QoS
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Flowchart of PFC QoS Egress LAN Port Features
Egress CoS Values
Egress Dscp Mutation with a PFC3
Egress ToS Byte
Egress PFC QoS Interfaces
Egress ACL Support for Remarked Dscp
Marking on Egress OSM Ports
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Understanding Classification and Marking
Classification and Marking at Untrusted Ingress Ports
Ingress Classification and Marking at Trusted Ports
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Classification and Marking at Ingress OSM Ports
Ingress Classification and Marking at Trust CoS LAN Ports
Ingress Classification and Marking at Trust Dscp Ports
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Policers
Classification and Marking on the Msfc
Overview of Policers
These sections describe policers
Aggregate Policers
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Microflow Policers
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Understanding Port-Based Queue Types
Ingress and Egress Buffers and Layer 2 CoS-Based Queues
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Ingress Queue Types
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Egress Queue Types
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Module to Queue Type Mappings
Ingress Egress Queue Drop
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PFC QoS Global Settings
Following global PFC QoS settings apply
Feature Default Value
= CoS Egress CoS set from final internal Dscp values
Default Values With PFC QoS Enabled
Receive-Queue Limits
Transmit-Queue Limit s
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Default Drop-Threshold Percentages and CoS Value Mappings
Bandwidth Allocation Ratios
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1q2t Receive Queues
1q4t Receive Queues
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1p1q4t Receive Queues
1p1q0t Receive Queues
1p1q8t Receive Queues
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1q8t Receive Queues
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2q8t Receive Queues
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8q4t Receive Queues
Standard receive queue Threshold CoS Lowest priority
11, 13, 15-17, 19, 21, 23
27, 29, 31, 33, 39, 41-45
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48-63
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8q8t Receive Queues
2q2t Transmit Queues
1p2q2t Transmit Queues
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1p3q8t Transmit Queues
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1p7q4t Transmit Queues
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Tail-drop 100% nonconfigurable
1p7q8t Transmit Queues
1p3q1t Transmit Queues
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Default Values With PFC QoS Disabled
1p2q1t Transmit Queues
General Guidelines
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PFC3 Guidelines
Wrr-queue bandwidth except Gigabit Ethernet LAN ports
PFC2 Guidelines
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Class Map Command Restrictions
Policy Map Command Restrictions
Policy Map Class Command Restrictions
Supported Granularity for CIR and PIR Rate Values
Supported Granularity for CIR and PIR Token Bucket Sizes
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IP Precedence and Dscp Values
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Command Purpose
Enabling PFC QoS Globally
Enables ignore port trust globally on the router
Disables ignore port trust globally on the router
Default
Enabling Ignore Port Trust
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Configuring Dscp Transparency
Enabling Queueing-Only Mode
Enabling Microflow Policing of Bridged Traffic
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Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports
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Enabling Egress ACL Support for Remarked Dscp
Creating Named Aggregate Policers
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Configuring a PFC QoS Policy
These sections describe PFC QoS policy configuration
PFC QoS Policy Configuration Overview
Protocol Numbered ACLs Extended ACLs Named ACLs
IPv4 Yes 100 to 1300 to 2000 to IPv6 Yes named
Yes 800 to Yes 900 to Supported only with PFC2 MAC Layer
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Configuring MAC ACLs
Configuring Protocol-Independent MAC ACL Filtering
Enabling VLAN-Based MAC QoS Filtering
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Configuring MAC ACLs
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Configuring ARP ACLs for QoS Filtering
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Configuring a Class Map
Creating a Class Map
Configuring Filtering in a Class Map
Optional Configures the class map to filter using an ACL
Clears the ACL configuration from the class map
Class Map Filtering Guidelines and Restrictions
Verifying Class Map Configuration
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Configuring a Policy Map
Policy Map Class Configuration Guidelines and Restrictions
Creating a Policy Map
To create a policy map, perform this task
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Creating a Policy Map Class and Configuring Filtering
Configuring Policy Map Class Actions
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Configuring Policy Map Class Marking
Configuring the Policy Map Class Trust State
Configuring Policy Map Class Policing
Using a Named Aggregate Policer
Configuring a Per-Interface Policer
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Verifying Policy Map Configuration
To verify policy map configuration, perform this task
Exits policy map class configuration mode
Additional classes in the policy map
Attaching a Policy Map to an Interface
To attach a policy map to an interface, perform this task
Attaches a policy map to the interface
Removes the policy map from the interface
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Router# show policy-map interface fastethernet 5/36
Configuring Egress Dscp Mutation on a PFC3
Configuring Named Dscp Mutation Maps
To configure a named Dscp mutation map, perform this task
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Attaching an Egress Dscp Mutation Map to an Interface
Attaches an egress Dscp mutation map to the interface
Removes the egress Dscp mutation map from
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Configuring Ingress CoS Mutation Maps
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Configuring Dscp Value Maps
Mapping Received CoS Values to Internal Dscp Values
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Configuring Dscp Markdown Values
Configures a Dscp markdown map
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Configures the internal Dscp to egress CoS map
Mapping Internal Dscp Values to Egress CoS Values
Configuring the Trust State of Ethernet LAN and OSM Ports
Configures the trust state of the port
Reverts to the default trust state untrusted
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Configuring the Ingress LAN Port CoS Value
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Configuring Standard-Queue Drop Threshold Percentages
Configures the ingress LAN port CoS value
Reverts to the default port CoS value
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Configuring a Tail-Drop Receive Queue
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Configuring a WRED-Drop Transmit Queue
Configuring a WRED-Drop and Tail-Drop Receive Queue
Configuring a WRED-Drop and Tail-Drop Transmit Queue
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Configuring 1q4t/2q2t Tail-Drop Threshold Percentages
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Configures the receive- and transmit-queue tail-drop
Reverts to the default receive- and transmit-queue
Tail-drop thresholds
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Configuring DSCP-Based Queue Mapping
Mapping QoS Labels to Queues and Drop Thresholds
Configuring Ingress DSCP-Based Queue Mapping
Configuring the Port to Trust Dscp
Enabling DSCP-Based Queue Mapping
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Reverts to the default mapping
Mapping Dscp Values to Standard Receive-Queue Thresholds
Maps Dscp values to the standard receive queue
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Queueing interface command
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Mapping Dscp Values to Standard Transmit-Queue Thresholds
Maps Dscp values to a standard transmit-queue
Mapping Dscp Values to the Transmit Strict-Priority Queue
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Configuring CoS-Based Queue Mapping
Mapping CoS Values to Standard Receive-Queue Thresholds
Maps CoS values to the standard receive queue
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Mapping CoS Values to Standard Transmit-Queue Thresholds
Maps CoS values to a standard transmit-queue threshold
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Mapping CoS Values to Strict-Priority Queues
Maps CoS values to the receive and transmit
Maps CoS values to a tail-drop threshold
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Allocating Bandwidth Between Standard Transmit Queues
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Setting the Receive-Queue Size Ratio
Reverts to the default size ratio
Sets the size ratio between the receive queues
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Configuring the Transmit-Queue Size Ratio
Configures the queue size ratio between transmit queues
Configures the strict priority queue size
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Access Layer
Distribution and Core Interswitch Links
Sample Network Design Overview
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Identify the Voice Signaling Traffic from an IP Phone Vvlan
Identify the Voice Traffic from an IP Phone Vvlan
Identify the SAP Traffic from the PC Dvlan
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Set dscp ef
Accepting the Traffic Priority Value on Interswitch Links
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Prioritizing Traffic on Interswitch Links
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Voice Strict Priority Voice signaling Queue 2, Threshold
Traffic Type
CoS from DSCP-to-CoS map Output Queue
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Using Policers to Limit the Amount of Traffic from a PC
Class map commands
To monitor the policing operation, use these commands
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PFC QoS Glossary
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