Enterprise QoS Solution Reference Network Design Guide

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Customer Edge QoS Design Considerations 5-12 Figure 5-6 Four-Class Provider-Edge Model Re-Marking Diagram Enterprise Application Routing Voice Interactive-Video Streaming-Video Mission-Critical Data Call-Signaling Transactional Data Network-Management Scavenger Best-Effort Enterprise QoS Solution Reference Network Design Guide DSCP CS6 EF AF41 CS5 CS4 AF21 DSCP 25 AF31 AF31/CS3 CS5 AF21 CS3 CS2 Bulk Data AF11 CS1 Chapter 5 MPLS VPN QoS Design Example 5-4 shows an example CE configuration for an advanced enterprise model mapping (over a dual-T1 link) into a four-class service-provider model. Example 5-4 CE Configuration for Four-Class Provider-Edge Model 0 PE Classes Real-Time 35% Critical Data 25% Best-Effort 25% ! class-map match-all ROUTING match ip dscp cs6 class-map match-all VOICE match ip dscp ef class-map match-all INTERACTIVE-VIDEO match ip dscp af41 class-map match-all STREAMING-VIDEO match ip dscp cs4 class-map match-all MISSION-CRITICAL-DATA match ip dscp 25 class-map match-any CALL-SIGNALING match ip dscp af31 match ip dscp cs3 class-map match-all TRANSACTIONAL-DATA match ip dscp af21 class-map match-all NETWORK-MANAGEMENT match ip dscp cs2 class-map match-all SCAVENGER match ip dscp cs1 ! ! policy-map CE-FOUR-CLASS-SP-MODEL class ROUTING bandwidth percent 3 ! Routing is assigned (by default) to Critical SP class class VOICE priority percent 18 ! Voice is admitted to Realtime SP class class INTERACTIVE-VIDEO priority percent 15 set ip dscp cs5 ! Interactive-Video is assigned to the Realtime SP class X EF CS5 CS6 AF31 CS3 AF21 CS2 Video 15% Version 3.3
Chapter 5 MPLS VPN QoS Design Version 3.3 Customer Edge QoS Design Considerations class STREAMING-VIDEO bandwidth percent 13 set ip dscp af21 ! Streaming-Video is assigned to the Video SP class class CALL-SIGNALING priority percent 2 ! Call-Signaling gets LLQ for this scenario set ip dscp cs5 ! Call-Signaling is assigned to the Realtime SP class class MISSION-CRITICAL-DATA bandwidth percent 12 random-detect set ip dscp af31 ! MC Data is assigned to the Critical SP class class TRANSACTIONAL-DATA bandwidth percent 10 random-detect set ip dscp cs3 ! Transactional Data is assigned to Critical SP class class NETWORK-MANAGEMENT bandwidth percent 2 ! Net Mgmt (mainly UDP) is admitted to Video SP class class SCAVENGER bandwidth percent 1 class class-default bandwidth percent 24 random-detect ! Verification commands: show policy show policy interface The max-reserved-bandwidth command might be required on the interface to which the previously discussed policy is applied. Five-Class Provider-Edge Model: CE Design Building again on the previous model, a fifth class is added that also can be used for either Bulk Data or Streaming-Video (whichever wasn’t used under the four-class model). The admission criterion for this new class is either DSCP AF11 or CS1, which necessitates the previously unrequired re-marking of the Scavenger class to DSCP 0 (so that it will not be admitted into the Bulk Data class, but will fall into the Best-Effort class). Figure 5-7 illustrates the re-marking required when using this new class for Bulk Data. Enterprise QoS Solution Reference Network Design Guide 5-13
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QoS Overview What is QoS? Version 3
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