Enterprise QoS Solution Reference Network Design Guide

Chapter 5 MPLS VPN QoS Design
Version 3.3
Customer Edge QoS Design Considerations
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
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 20
random-detect
set ip dscp af31 ! MC Data is assigned to the Critical SP class
class TRANSACTIONAL-DATA
bandwidth percent 15
random-detect
set ip dscp cs3 ! Transactional Data is assigned to Critical SP class
class NETWORK-MANAGEMENT
bandwidth percent 2
set ip dscp cs3 ! Net Mgmt is assigned to Critical 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.
Four-Class Provider-Edge Model: CE Design
Building on the previous model, a fourth class is added that can be used for either Bulk Data or
Streaming-Video. The admission criterion for this new class is either DSCP AF21 or CS2. The
re-marking diagram shown in Figure 5-6 illustrates how this new class can be used for Streaming-Video
and (primarily UDP-based) Network-Management traffic.
Enterprise QoS Solution Reference Network Design Guide
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