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...
Page 8 - Port Trust; Ingress Congestion Avoidance; PFC and DFC QoS Features
42-8 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 Port Trust In PFC QoS, trust means to accept as valid and use as the basis of the initial internal DSCP value. You can configure ports as unt...
Page 9 - Supported Policy Feature Cards; Feature
42-9 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 Supported Policy Feature Cards The policy feature card (PFC) is a daughter card that resides on the supervisor engine. The PFC provides QoS i...
Page 11 - Internal DSCP Values
42-11 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 Internal DSCP Values During processing, PFC QoS represents the priority of all traffic (including non-IP traffic) with an internal DSCP valu...
Page 12 - Port-Based PFC QoS and VLAN-Based PFC QoS; PFC QoS Egress Port Features
42-12 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 Port-Based PFC QoS and VLAN-Based PFC QoS You can configure each ingress LAN port for either physical port-based PFC QoS (default) or VLAN-b...
Page 13 - Flowchart of PFC QoS Egress LAN Port Features
42-13 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 PFC QoS Egress LAN Port Features Figure 42-7 shows how traffic flows through the QoS features on egress LAN ports. Figure 42-7 ...
Page 14 - Egress DSCP Mutation with a PFC3; Egress ToS Byte; Egress PFC QoS Interfaces; Egress ACL Support for Remarked DSCP
42-14 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 Egress DSCP Mutation with a PFC3 With a PFC3, you can configure 15 egress DSCP mutation maps to mutate the internal DSCP value before it is ...
Page 15 - Marking on Egress OSM Ports
42-15 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 On interfaces where egress ACL support for remarked DSCP is configured, the PFC3 processes each QoS-filtered IP packet twice: once to apply ...
Page 16 - Understanding Classification and Marking; Classification and Marking at Untrusted Ingress Ports; Ingress Classification and Marking at Trusted Ports
42-16 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 Classification and Marking The following sections describe where and how classification and marking occur on the Cisco 7600 se...
Page 17 - Classification and Marking at Ingress OSM Ports
42-17 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 These sections describe classification and marking at trusted ingress ports: • Ingress Classification and Marking at Trust CoS LAN Ports, pa...
Page 18 - match
42-18 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 • Trust CoS (CoS is always zero for POS and ATM OSM ports because the port CoS value is not configurable on POS and ATM OSM ports.) Classifi...
Page 19 - Classification and Marking on the MSFC; Policers; Overview of Policers
42-19 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 Classification and Marking on the MSFC PFC QoS sends IP traffic to the MSFC with the final internal DSCP values. CoS is equal to IP preceden...
Page 20 - Aggregate Policers; police
42-20 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 The PFC2 supports only ingress PFC QoS, which includes ingress policing. The PFC3 supports both ingress and egress PFC QoS, which includes i...
Page 21 - Microflow Policers; police flow; drop
42-21 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 Microflow Policers PFC QoS applies the bandwidth limit specified in a microflow policer separately to each flow in matched traffic. For exam...
Page 22 - conform-action transmit; Understanding Port-Based Queue Types; Ingress and Egress Buffers and Layer 2 CoS-Based Queues
42-22 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 With a PFC3, policing uses the Layer 2 frame size. With a PFC2, policing uses the Layer 3 packet size. You specify the bandwidth utilization...
Page 24 - Ingress Queue Types; CoS
42-24 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 42-10 illustrates the drop thresholds for a 1q4t ingress LAN port. Drop thresholds in other configurations function similarly. Figure...
Page 25 - Egress Queue Types
42-25 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 • 1p1q0t indicates: – One strict-priority queue – One standard queue with no configurable threshold (effectively a tail-drop threshold at 10...
Page 26 - Module to Queue Type Mappings; Supervisor Engines; Modules
42-26 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 • 1p7q8t indicates the following: – One strict-priority queue – Seven standard queues, each with eight thresholds, each threshold configurab...
Page 28 - PFC QoS Default Configuration
42-28 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration PFC QoS Default Configuration These sections describe the PFC QoS default configuration: • PFC QoS Global Settings, page 42-29 • Default Value...
Page 29 - PFC QoS Global Settings; Feature Default
42-29 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 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 e...
Page 30 - Default Values With PFC QoS Enabled; Receive-Queue Limits
42-30 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration Default Values With PFC QoS Enabled These sections list the default values that apply when PFC QoS is enabled: • Receive-Queue Limits, page 42...
Page 31 - Bandwidth Allocation Ratios
42-31 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration Bandwidth Allocation Ratios Default Drop-Threshold Percentages and CoS Value Mappings The following tables list the default drop-thresholds va...
Page 32 - q2t Receive Queues
42-32 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration • 1p2q2t Transmit Queues, page 42-42 • 1p3q8t Transmit Queues, page 42-43 • 1p7q4t Transmit Queues, page 42-44 • 1p7q8t Transmit Queues, page ...
Page 33 - p1q4t Receive Queues; Feature Default
42-33 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 1p1q4t Receive Queues 1p1q0t Receive Queues Feature Default Value Standard receive queue Threshold 1 CoS 0 and 1 Tail-drop 50% WRED-drop Not s...
Page 34 - p1q8t Receive Queues
42-34 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 1p1q8t Receive Queues Feature Default Value Standard receive queue Threshold 1 CoS 0 Tail-drop Disabled; 70% WRED-drop Enabled; 40% low, 70% h...
Page 35 - q8t Receive Queues
42-35 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 1q8t Receive Queues Feature Default Value Standard receive queue Threshold 1 CoS 0 Tail-drop 50% WRED-drop Not supported Threshold 2 CoS None ...
Page 36 - q8t Receive Queues
42-36 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 2q8t Receive Queues Feature Default Value Standard receive queue 1(low priority) Threshold 1 CoS 0 and 1 Tail-drop 70% WRED-drop Not supported...
Page 37 - q4t Receive Queues
42-37 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 8q4t Receive Queues Feature Default Value Standard receive queue 1(lowest priority) Threshold 1 CoS 0 and 1 DSCP 0–9, 11, 13, 15–17, 19, 21, 2...
Page 38 - Default Value
42-38 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration Standard receive queue 3 (intermediate priority) Threshold 1 CoS None DSCP 22 Tail-drop Enabled; 100% WRED-drop Disabled; 100% low, 100% high ...
Page 41 - q8t Receive Queues
42-41 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 8q8t Receive Queues 2q2t Transmit Queues Feature Default Value Standard receive queue 1(lowest priority) Threshold 1 CoS 0 and 1 Tail-drop Dis...
Page 42 - p2q2t Transmit Queues
42-42 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 1p2q2t Transmit Queues Standard transmit queue 2 (high priority) Threshold 1 CoS 4 and 5 Tail-drop 80% WRED-drop Not supported Threshold 2 CoS...
Page 43 - p3q8t Transmit Queues
42-43 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 1p3q8t Transmit Queues Feature Default Value Standard transmit queue 1(lowest priority) Threshold 1 CoS 0 Tail-drop Disabled; 70% WRED-drop En...
Page 44 - p7q4t Transmit Queues
42-44 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 1p7q4t Transmit Queues Feature Default Value Standard receive queue 1(lowest priority) Threshold 1 CoS 0 and 1 DSCP 0–9, 11, 13, 15–17, 19, 21...
Page 47 - p7q8t Transmit Queues
42-47 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 1p7q8t Transmit Queues Standard receive queue 7(intermediate priority) Threshold 1 CoS None DSCP None Tail-drop Enabled; 100% WRED-drop Disabl...
Page 48 - p3q1t Transmit Queues
42-48 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Default Configuration 1p3q1t Transmit Queues Standard transmit queue 2 (intermediate priority) Threshold 1 CoS 2 Tail-drop Disabled; 70% WRED-drop Enabled; 40% low,...
Page 49 - p2q1t Transmit Queues; Default Values With PFC QoS Disabled; PFC QoS Configuration Guidelines and Restrictions
42-49 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Configuration Guidelines and Restrictions 1p2q1t Transmit Queues Default Values With PFC QoS Disabled PFC QoS Configuration Guidelines and Restrictions When configu...
Page 50 - General Guidelines
42-50 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Configuration Guidelines and Restrictions General Guidelines • The match ip precedence and match ip dscp commands filter only IPv4 traffic. • In Release 12.2(18)SXE...
Page 51 - PFC3 Guidelines; show mls qos ipv6
42-51 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Configuration Guidelines and Restrictions • For these commands, PFC QoS applies identical configuration to all LAN ports controlled by the same application-specific...
Page 52 - match protocol ipv6; PFC2 Guidelines; match protocol
42-52 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Configuration Guidelines and Restrictions • The QoS features implemented in the port ASICs (queue architecture and dequeuing algorithms) support IPv4 and IPv6 traff...
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
42-53 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Configuration Guidelines and Restrictions Class Map Command Restrictions • With Release 12.2(18)SXE and later releases, PFC QoS supports the match any class map com...
Page 54 - Supported Granularity for CIR and PIR Token Bucket Sizes
42-54 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Configuration Guidelines and Restrictions Within each range, PFC QoS programs the PFC with rate values that are multiples of the granularity values. Supported Granu...
Page 55 - IP Precedence and DSCP Values; Configuring PFC QoS
42-55 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS IP Precedence and DSCP Values Configuring PFC QoS These sections describe how to configure PFC QoS on the Cisco 7600 series routers: • Enabling PFC QoS ...
Page 56 - Enabling PFC QoS Globally; Command
42-56 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS • Enabling Microflow Policing of Bridged Traffic, page 42-59 • Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports, page 42-60 • Enabling Egress ACL Suppor...
Page 57 - Enabling Ignore Port Trust
42-57 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS IP packets with COS changed by policing: 59998 Non-IP packets with COS changed by policing: 0 Router# Enabling Ignore Port Trust In Release 12.2(18)SXF5...
Page 58 - Configuring DSCP Transparency; no mls qos rewrite; Enabling Queueing-Only Mode
42-58 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Configuring DSCP Transparency Note • In addition to support for other IP traffic, the PFC3B and PFC3BXL support the no mls qos rewrite ip dscp command f...
Page 59 - Enabling Microflow Policing of Bridged Traffic; mls qos bridged
42-59 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Note The router applies the port CoS value to untagged ingress traffic and to traffic that is received through ports that cannot be configured to trust ...
Page 60 - Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports; switchport; no mls qos vlan-based
42-60 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports Note • With a PFC2, PFC QoS does not support VLAN-based QoS with DFCs installed. • With a PFC3, PFC QoS...
Page 61 - Enabling Egress ACL Support for Remarked DSCP
42-61 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Enabling Egress ACL Support for Remarked DSCP To enable egress ACL support for remarked DSCP on an ingress interface, perform this task: When configurin...
Page 64 - AgId; Configuring a PFC QoS Policy
42-64 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Note When you apply both ingress policing and egress policing to the same traffic, both the input policy and the output policy must either mark down tra...
Page 65 - PFC QoS Policy Configuration Overview; transmit; Protocol
42-65 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS PFC QoS Policy Configuration Overview Note To mark traffic without limiting bandwidth utilization, create a policer that uses the transmit keywords for ...
Page 66 - Configuring MAC ACLs; Configuring Protocol-Independent MAC ACL Filtering
42-66 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS • class-map (optional)—Enter the class-map command to define one or more traffic classes by specifying the criteria by which traffic is classified. • po...
Page 67 - Enabling VLAN-Based MAC QoS Filtering
42-67 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS When configuring protocol-independent MAC ACL filtering, note the following information: • Do not configure protocol-independent MAC ACL filtering on VL...
Page 68 - vlan
42-68 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS To disable VLAN-based QoS filtering in MAC ACLs, perform this task: Configuring MAC ACLs You can configure named ACLs that filter IPX, DECnet, AppleTalk...
Page 69 - deny any any; Configuring ARP ACLs for QoS Filtering
42-69 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS • ACL entries are scanned in the order you enter them. The first matching entry is used. To improve performance, place the most commonly used entries ne...
Page 70 - deny ip any mac any; Configuring a Class Map; Creating a Class Map
42-70 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS With a PFC3 and Release 12.2(18)SXD and later releases, you can configure named ACLs that filter ARP traffic (EtherType 0x0806) for QoS. To configure an...
Page 71 - Class Map Filtering Guidelines and Restrictions; Configuring Filtering in a Class Map
42-71 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Class Map Filtering Guidelines and Restrictions When configuring class map filtering, follow these guidelines and restrictions: • With Release 12.2(18)S...
Page 72 - Verifying Class Map Configuration
42-72 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Verifying Class Map Configuration To verify class map configuration, perform this task: This example shows how to create a class map named ipp5 and how ...
Page 73 - Configuring a Policy Map; Creating a Policy Map
42-73 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS This example shows how to verify the configuration: Router# show class-map ipp5 Class Map match-all ipp5 (id 1) Match ip precedence 5 Configuring a Poli...
Page 74 - Creating a Policy Map Class and Configuring Filtering
42-74 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Creating a Policy Map Class and Configuring Filtering To create a policy map class and configure it to filter with a class map, perform this task: Confi...
Page 77 - flow
42-77 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS When configuring a per-interface policer, note the following information: • Aggregate policing works independently on each DFC-equipped switching module...
Page 79 - Verifying Policy Map Configuration
42-79 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS • (Optional) For traffic that exceeds the CIR, you can specify an exceed action as follows: – For marking without policing, you can enter the transmit k...
Page 80 - Attaching a Policy Map to an Interface
42-80 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS This example shows how to verify the configuration: Router# show policy-map max-pol-ipp5 Policy Map max-pol-ipp5 class ipp5 class ipp5 police flow 10000...
Page 82 - Configuring Egress DSCP Mutation on a PFC3; Configuring Named DSCP Mutation Maps
42-82 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Configuring Egress DSCP Mutation on a PFC3 Note The PFC2 does not support egress DSCP mutation. These sections describe how to configure egress DSCP mut...
Page 83 - Attaching an Egress DSCP Mutation Map to an Interface; Configuring Ingress CoS Mutation on IEEE 802.1Q Tunnel Ports
42-83 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Note In the DSCP mutation map displays, the marked-down DSCP values are shown in the body of the matrix; the first digit of the original DSCP value is i...
Page 85 - Configuring Ingress CoS Mutation Maps; Applying Ingress CoS Mutation Maps to IEEE 802.1Q Tunnel Ports
42-85 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Configuring Ingress CoS Mutation Maps To configure an ingress CoS mutation map, perform this task: This example shows how to configure a CoS mutation ma...
Page 86 - Configuring DSCP Value Maps; Mapping Received CoS Values to Internal DSCP Values
42-86 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS This example shows how to attach the ingress CoS mutation map named testmap to Gigabit Ethernet port 1/1: Router# configure terminal Enter configuration...
Page 87 - Mapping Received IP Precedence Values to Internal DSCP Values
42-87 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS This example shows how to verify the configuration: Router# show mls qos maps | begin Cos-dscp map Cos-dscp map: cos: 0 1 2 3 4 5 6 7 ------------------...
Page 88 - pir
42-88 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS When configuring a DSCP markdown map, note the following information: • You can enter the normal-burst keyword to configure the markdown map used by the...
Page 89 - Mapping Internal DSCP Values to Egress CoS Values
42-89 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Maximum Burst Policed-dscp map: (dscp= d1d2) d1 : d2 0 1 2 3 4 5 6 7 8 9 ------------------------------------- 0 : 00 01 02 03 04 05 06 07 08 09 1 : 10 ...
Page 90 - Configuring the Trust State of Ethernet LAN and OSM Ports; mls qos trust; mls qos trust dscp
42-90 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS This example shows how to verify the configuration: Router# show mls qos map | begin Dscp-cos map Dscp-cos map: (dscp= d1d2) d1 : d2 0 1 2 3 4 5 6 7 8 9...
Page 91 - Configuring the Ingress LAN Port CoS Value
42-91 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS • The mls qos trust cos command enables CoS-based receive-queue drop thresholds. To avoid dropping traffic because of inconsistent CoS values, configure...
Page 92 - Configuring Standard-Queue Drop Threshold Percentages
42-92 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS To configure the CoS value for an ingress LAN port, perform this task: This example shows how to configure the CoS value 5 on Fast Ethernet port 5/24 an...
Page 93 - Configuring a Tail-Drop Receive Queue
42-93 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS When you configure multiple-threshold standard queues, note the following information: • The first percentage that you enter sets the lowest-priority th...
Page 94 - Configuring a WRED-Drop Transmit Queue
42-94 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS This example shows how to verify the configuration: Router# show queueing interface gigabitethernet 1/1 | begin Receive queues Receive queues [type = 1p...
Page 95 - Configuring a WRED-Drop and Tail-Drop Transmit Queue
42-95 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS To configure the drop thresholds, perform this task: Configuring a WRED-Drop and Tail-Drop Transmit Queue These port types have both WRED-drop and tail-...
Page 96 - Configuring 1q4t/2q2t Tail-Drop Threshold Percentages
42-96 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS This example shows how to configure the low-priority transmit queue high-WRED-drop thresholds for Gigabit Ethernet port 1/1: Router# configure terminal ...
Page 98 - Mapping QoS Labels to Queues and Drop Thresholds; Queue and Drop Threshold Mapping Guidelines and Restrictions; Configuring DSCP-Based Queue Mapping
42-98 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Mapping QoS Labels to Queues and Drop Thresholds These sections describe how to map QoS labels to queues and drop thresholds: Note Enter the show queuei...
Page 99 - Enabling DSCP-Based Queue Mapping
42-99 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Enabling DSCP-Based Queue Mapping To enable DSCP-based queue mapping, perform this task: This example shows how to enable DSCP-based queue mapping on 10...
Page 101 - show
42-101 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Note The receive queue mapping is shown in the second “queue thresh dscp-map” displayed by the show queueing interface command. This example shows how ...
Page 102 - Mapping DSCP Values to Standard Transmit-Queue Thresholds
42-102 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Mapping DSCP Values to Standard Transmit-Queue Thresholds To map DSCP values to standard transmit-queue thresholds, perform this task: When mapping DSC...
Page 103 - show queueing interface; Mapping DSCP Values to the Transmit Strict-Priority Queue
42-103 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Note The eighth queue is the strict priority queue in the output of the show queueing interface command. This example shows how to verify the configura...
Page 104 - Configuring CoS-Based Queue Mapping; Mapping CoS Values to Standard Receive-Queue Thresholds
42-104 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS When mapping DSCP values to the strict-priority queue, note the following information: • The queue number is always 1. • You can enter up to 8 DSCP val...
Page 105 - Mapping CoS Values to Standard Transmit-Queue Thresholds
42-105 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS This example shows how to map the CoS values 0 and 1 to threshold 1 in the standard receive queue for Gigabit Ethernet port 1/1: Router# configure term...
Page 106 - Mapping CoS Values to Strict-Priority Queues
42-106 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Mapping CoS Values to Strict-Priority Queues To map CoS values to the receive and transmit strict-priority queues, perform this task: When mapping CoS ...
Page 107 - Mapping CoS Values to Tail-Drop Thresholds on 1q4t/2q2t LAN Ports
42-107 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Mapping CoS Values to Tail-Drop Thresholds on 1q4t/2q2t LAN Ports Note Enter the show queueing interface { ethernet | fastethernet | gigabitethernet | ...
Page 108 - Allocating Bandwidth Between Standard Transmit Queues
42-108 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Allocating Bandwidth Between Standard Transmit Queues The router transmits frames from one standard queue at a time using one of these dequeuing algori...
Page 109 - bandwidth
42-109 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS To allocate bandwidth between standard transmit queues, perform this task: This example shows how to allocate a 3-to-1 bandwidth ratio for Gigabit Ethe...
Page 110 - Setting the Receive-Queue Size Ratio
42-110 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Setting the Receive-Queue Size Ratio You can set the size ratio between the standard receive queues on 2q8t , 8q4t , and 8q8t ports and between the str...
Page 111 - Configuring the Transmit-Queue Size Ratio
42-111 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Configuring PFC QoS Configuring the Transmit-Queue Size Ratio To configure the transmit-queue size ratio, perform this task: When configuring the transmit-queue size ratio...
Page 112 - Common QoS Scenarios; Sample Network Design Overview
42-112 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Common QoS Scenarios This example shows how to set the transmit-queue size ratio for Gigabit Ethernet port 1/2: Router# configure terminal Enter configuration commands, on...
Page 113 - Classifying Traffic from PCs and IP Phones in the Access Layer
42-113 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Common QoS Scenarios These are the three traffic classes in the sample network: • Voice • High-priority application traffic • Best-effort traffic The QoS configuration des...
Page 116 - Accepting the Traffic Priority Value on Interswitch Links
42-116 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Common QoS Scenarios Class Map match-any class-default (id 0) Match any Class Map match-all CLASSIFY-PC-SAP (id 2) Match access-group name CLASSIFY-PC-SAP Class Map match-...
Page 117 - Prioritizing Traffic on Interswitch Links
42-117 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Common QoS Scenarios If you know that all traffic entering a particular port can be trusted (as is the case on access-distribution or distribution-core uplink ports), you ...
Page 119 - Traffic Type
42-119 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Common QoS Scenarios 3 5 3 6 3 7 3 8 4 1 5 <output truncated> You want voice traffic mapped to the strict priority queue, which is queue 4 on 1p3q8t ports. The examp...
Page 120 - Using Policers to Limit the Amount of Traffic from a PC; set dscp
42-120 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS Common QoS Scenarios The WRR algorithm uses relative weights that are assigned to the WRR queues. If there are three queues and their weights are 22:33:45 (which are the d...
Page 122 - PFC QoS Glossary
42-122 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX OL-4266-08 Chapter 42 Configuring PFC QoS PFC QoS Glossary PFC QoS Glossary This section defines some of the QoS terminology used in this chapter: • Buffers —A storage area used for handling data in transit. Buffe...
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