Traffic Leaving Service Provider Network

Managed CE

Managed CE

Service provider enforces SLA using the output QoS policy on PE.

Output policy uses queuing, dropping, and, optionally, shaping. May require LFI or cRTP. No input QoS policy on CE needed.

Service provider enforces SLA using the output QoS policy on PE.

Output policy uses queuing, dropping, and, optionally, shaping. May require LFI or cRTP. Input QoS policy on CE irrelevant.

Service provider enforces SLA using the output QoS policy on PE.

Output policy uses queuing, dropping, and, optionally, shaping. May require LFI or cRTP. Input QoS policy on CE irrelevant.

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For traffic leaving the service provider PE router toward the enterprise CE router, the figure illustrates the general QoS requirements on the CE and PE routers.

For both managed and unmanaged CE service, the service provider can enforce the SLA for each traffic class using the output QoS policy on the PE. For example, use LLQ or CBWFQ to give a maximum bandwidth guarantee to the real-time voice and video traffic class, give a minimum bandwidth guarantee to the data traffic classes, and use class-based shaping to provide a maximum rate limit to each data traffic class.

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