Cisco ME-3400G-12CS-A-RF - Ethernet Access Switch Manual de usuario Pagina 130

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© 2009 Cisco Systems, Inc. All rights reserved.
131
Cisco PublicBRKBBA-2006
FTTH QoS Strategy
End-to-End QoS based on DiffServ model
Traffic Marking
Rely on classification capability of access switch
Smart IP addressing makes this extremely easy
Or…rely on CPE device (not recommended)
Per service policing can be done on access switch
Certainly needed for Voice and Video
Per class queuing on customer facing ports
Voice added to Strict Priority Queue (Policing is needed!)
Video added to Weighted Round Robin Queue with highest weight
Per class queuing and congestion avoidance on uplinks (strict priority
queuing, WRR queuing, weighted RED or taildrop)
Fairness between subscribers can be achieved using per-subscriber
In/Out contract policing and WRED at the Internet access router
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