Cisco OL-4266-08 - Manual

Cisco OL-4266-08

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Table of Contents:

  • Page 2 – Understanding How PFC QoS Works; Port Types Supported by PFC QoS; Overview
  • Page 6 – Component Overview; Ingress LAN Port PFC QoS Features
  • Page 7 – Flowchart of Ingress LAN Port PFC QoS Features
  • Page 8 – Port Trust; Ingress Congestion Avoidance; PFC and DFC QoS Features
  • Page 9 – Supported Policy Feature Cards; Feature
  • Page 11 – Internal DSCP Values
  • Page 12 – Port-Based PFC QoS and VLAN-Based PFC QoS; PFC QoS Egress Port Features
  • Page 13 – Flowchart of PFC QoS Egress LAN Port Features
  • Page 14 – Egress DSCP Mutation with a PFC3; Egress ToS Byte; Egress PFC QoS Interfaces; Egress ACL Support for Remarked DSCP
  • Page 15 – Marking on Egress OSM Ports
  • Page 16 – Understanding Classification and Marking; Classification and Marking at Untrusted Ingress Ports; Ingress Classification and Marking at Trusted Ports
  • Page 17 – Classification and Marking at Ingress OSM Ports
  • Page 18 – match
  • Page 19 – Classification and Marking on the MSFC; Policers; Overview of Policers
  • Page 20 – Aggregate Policers; police
  • Page 21 – Microflow Policers; police flow; drop
  • Page 22 – conform-action transmit; Understanding Port-Based Queue Types; Ingress and Egress Buffers and Layer 2 CoS-Based Queues
  • Page 24 – Ingress Queue Types; CoS
  • Page 25 – Egress Queue Types
  • Page 26 – Module to Queue Type Mappings; Supervisor Engines; Modules
  • Page 28 – PFC QoS Default Configuration
  • Page 29 – PFC QoS Global Settings; Feature Default
  • Page 30 – Default Values With PFC QoS Enabled; Receive-Queue Limits
  • Page 31 – Bandwidth Allocation Ratios
  • Page 32 – q2t Receive Queues
  • Page 33 – p1q4t Receive Queues; Feature Default
  • Page 34 – p1q8t Receive Queues
  • Page 35 – q8t Receive Queues
  • Page 36 – q8t Receive Queues
  • Page 37 – q4t Receive Queues
  • Page 38 – Default Value
  • Page 41 – q8t Receive Queues
  • Page 42 – p2q2t Transmit Queues
  • Page 43 – p3q8t Transmit Queues
  • Page 44 – p7q4t Transmit Queues
  • Page 47 – p7q8t Transmit Queues
  • Page 48 – p3q1t Transmit Queues
  • Page 49 – p2q1t Transmit Queues; Default Values With PFC QoS Disabled; PFC QoS Configuration Guidelines and Restrictions
  • Page 50 – General Guidelines
  • Page 51 – PFC3 Guidelines; show mls qos ipv6
  • Page 52 – match protocol ipv6; PFC2 Guidelines; match protocol
  • Page 53 – Class Map Command Restrictions; Policy Map Command Restrictions; Policy Map Class Command Restrictions; Supported Granularity for CIR and PIR Rate Values; CIR and PIR Rate Value Range
  • Page 54 – Supported Granularity for CIR and PIR Token Bucket Sizes
  • Page 55 – IP Precedence and DSCP Values; Configuring PFC QoS
  • Page 56 – Enabling PFC QoS Globally; Command
  • Page 57 – Enabling Ignore Port Trust
  • Page 58 – Configuring DSCP Transparency; no mls qos rewrite; Enabling Queueing-Only Mode
  • Page 59 – Enabling Microflow Policing of Bridged Traffic; mls qos bridged
  • Page 60 – Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports; switchport; no mls qos vlan-based
  • Page 61 – Enabling Egress ACL Support for Remarked DSCP
  • Page 64 – AgId; Configuring a PFC QoS Policy
  • Page 65 – PFC QoS Policy Configuration Overview; transmit; Protocol
  • Page 66 – Configuring MAC ACLs; Configuring Protocol-Independent MAC ACL Filtering
  • Page 67 – Enabling VLAN-Based MAC QoS Filtering
  • Page 68 – vlan
  • Page 69 – deny any any; Configuring ARP ACLs for QoS Filtering
  • Page 70 – deny ip any mac any; Configuring a Class Map; Creating a Class Map
  • Page 71 – Class Map Filtering Guidelines and Restrictions; Configuring Filtering in a Class Map
  • Page 72 – Verifying Class Map Configuration
  • Page 73 – Configuring a Policy Map; Creating a Policy Map
  • Page 74 – Creating a Policy Map Class and Configuring Filtering
  • Page 77 – flow
  • Page 79 – Verifying Policy Map Configuration
  • Page 80 – Attaching a Policy Map to an Interface
  • Page 82 – Configuring Egress DSCP Mutation on a PFC3; Configuring Named DSCP Mutation Maps
  • Page 83 – Attaching an Egress DSCP Mutation Map to an Interface; Configuring Ingress CoS Mutation on IEEE 802.1Q Tunnel Ports
  • Page 85 – Configuring Ingress CoS Mutation Maps; Applying Ingress CoS Mutation Maps to IEEE 802.1Q Tunnel Ports
  • Page 86 – Configuring DSCP Value Maps; Mapping Received CoS Values to Internal DSCP Values
  • Page 87 – Mapping Received IP Precedence Values to Internal DSCP Values
  • Page 88 – pir
  • Page 89 – Mapping Internal DSCP Values to Egress CoS Values
  • Page 90 – Configuring the Trust State of Ethernet LAN and OSM Ports; mls qos trust; mls qos trust dscp
  • Page 91 – Configuring the Ingress LAN Port CoS Value
  • Page 92 – Configuring Standard-Queue Drop Threshold Percentages
  • Page 93 – Configuring a Tail-Drop Receive Queue
  • Page 94 – Configuring a WRED-Drop Transmit Queue
  • Page 95 – Configuring a WRED-Drop and Tail-Drop Transmit Queue
  • Page 96 – Configuring 1q4t/2q2t Tail-Drop Threshold Percentages
  • Page 98 – Mapping QoS Labels to Queues and Drop Thresholds; Queue and Drop Threshold Mapping Guidelines and Restrictions; Configuring DSCP-Based Queue Mapping
  • Page 99 – Enabling DSCP-Based Queue Mapping
  • Page 101 – show
  • Page 102 – Mapping DSCP Values to Standard Transmit-Queue Thresholds
  • Page 103 – show queueing interface; Mapping DSCP Values to the Transmit Strict-Priority Queue
  • Page 104 – Configuring CoS-Based Queue Mapping; Mapping CoS Values to Standard Receive-Queue Thresholds
  • Page 105 – Mapping CoS Values to Standard Transmit-Queue Thresholds
  • Page 106 – Mapping CoS Values to Strict-Priority Queues
  • Page 107 – Mapping CoS Values to Tail-Drop Thresholds on 1q4t/2q2t LAN Ports
  • Page 108 – Allocating Bandwidth Between Standard Transmit Queues
  • Page 109 – bandwidth
  • Page 110 – Setting the Receive-Queue Size Ratio
  • Page 111 – Configuring the Transmit-Queue Size Ratio
  • Page 112 – Common QoS Scenarios; Sample Network Design Overview
  • Page 113 – Classifying Traffic from PCs and IP Phones in the Access Layer
  • Page 116 – Accepting the Traffic Priority Value on Interswitch Links
  • Page 117 – Prioritizing Traffic on Interswitch Links
  • Page 119 – Traffic Type
  • Page 120 – Using Policers to Limit the Amount of Traffic from a PC; set dscp
  • Page 122 – PFC QoS Glossary
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C H A P T E R

42-1

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

OL-4266-08

42

Configuring PFC QoS

This chapter describes how to configure quality of service (QoS) as implemented on the Policy Feature
Card (PFC) and Distributed Forwarding Cards (DFCs) on the Cisco 7600 series routers.

Note

•

For complete syntax and usage information for the commands used in this chapter, refer to the

Cisco 7600 Series Router Cisco IOS Command Reference

at this URL:

http://www.cisco.com/univercd/cc/td/doc/product/core/cis7600/software/122sx/cmdref/index.htm

•

For information about QoS and MPLS, see

Chapter 43, “Configuring PFC3BXL or PFC3B Mode

MPLS QoS.”

•

QoS on the Cisco 7600 series routers (PFC QoS) uses some Cisco IOS modular QoS CLI (MQC).
Because PFC QoS is implemented in hardware, it supports only a subset of the MQC syntax.

•

The PFC3 does not support Network-Based Application Recognition (NBAR).

•

With a Supervisor Engine 2, PFC2, and MSFC2, you can configure NBAR on Layer 3 interfaces
instead of PFC QoS:

–

The PFC2 provides hardware support for input ACLs on ports where you configure NBAR.

–

When PFC QoS is enabled, the traffic through ports where you configure NBAR passes through
the ingress and egress queues and drop thresholds.

–

When PFC QoS is enabled, the MSFC2 sets egress CoS equal to egress IP precedence in NBAR
traffic.

–

After passing through an ingress queue, all traffic is processed in software on the MSFC2 on
interfaces where you configure NBAR.

–

To configure NBAR, refer to this publication:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t8/dtnba
rad.htm

This chapter contains these sections:

•

Understanding How PFC QoS Works, page 42-2

•

PFC QoS Default Configuration, page 42-28

•

PFC QoS Configuration Guidelines and Restrictions, page 42-49

•

Configuring PFC QoS, page 42-55

•

Common QoS Scenarios, page 42-112

•

PFC QoS Glossary, page 42-122

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Summary

Page 2 - Understanding How PFC QoS Works; Port Types Supported by PFC QoS; Overview

42-2 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Understanding How PFC QoS Works Understanding How PFC QoS Works The term “PFC QoS” refers to QoS on the Cisco 7600 series router. PFC QoS is implemented on various router co...

Page 6 - Component Overview; Ingress LAN Port PFC QoS Features

42-6 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Understanding How PFC QoS Works Figure 42-4 PFC QoS Features and Component Overview Component Overview These sections provide more detail about the role of the following com...

Page 7 - Flowchart of Ingress LAN Port PFC QoS Features

42-7 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Understanding How PFC QoS Works Flowchart of Ingress LAN Port PFC QoS Features Figure 42-5 shows how traffic flows through the ingress LAN port PFC QoS features. Figure 42-5...

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