Enterprise QoS Solution Reference Network Design Guide

WAN Edge Classification and Provisioning Models
3-12
Figure 3-5 Eight-Class WAN Edge Model Bandwidth Allocations Example
Scavenger 1%
Bulk Data
4%
Best-Effort
25%
Critical Data
27%
Enterprise QoS Solution Reference Network Design Guide
Chapter 3 WAN Aggregator QoS Design
Example 3-7 shows the corresponding configuration (over a dual-T1 link) for the Eight-Class Model.
Example 3-7 Eight-Class WAN Edge Model
Voice
18%
Network-Control
5%
Interactive-Video
15%
Call-Signaling
5%
*Dual-T1 Link Example
!
class-map match-all Voice
match ip dscp ef ! IP Phones mark Voice to EF
class-map match-all Interactive Video
match ip dscp af41 af42 ! Recommended markings for IP/VC
class-map match-any Call Signaling
match ip dscp cs3 ! Future Call-Signaling marking
match ip dscp af31 ! Current Call-Signaling marking
class-map match-any Network Control
match ip dscp cs6 ! Routers mark Routing traffic to CS6
match ip dscp cs2 ! Recommended marking for Network Management
class-map match-all Critical Data
match ip dscp af21 af22 ! Recommended markings for Transactional-Data
class-map match-all Bulk Data
match ip dscp af11 af12 ! Recommended markings for Bulk-Data
class-map match-all Scavenger
match ip dscp cs1 ! Scavenger marking
!
policy-map WAN-EDGE
class Voice
priority percent 18 ! Voice gets 552 kbps of LLQ
class Interactive Video
priority percent 15 ! 384 kbps IP/VC needs 460 kbps of LLQ
class Call Signaling
bandwidth percent 5 ! BW guarantee for Call-Signaling
class Network Control
bandwidth percent 5 ! Routing and Network Management get min 5% BW
class Critical Data
bandwidth percent 27 ! Critical Data gets min 27% BW
random-detect dscp-based ! Enables DSCP-WRED for Critical-Data class
class Bulk Data
bandwidth percent 4 ! Bulk Data gets min 4% BW guarantee
Version 3.3