How MPLS QoS Works

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How MPLS QoS Works
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Traffic Flow- Customer CPE

• Customer CPE
• Customer CPE -identifies and tags each of the 6
  types of the traffic with TOS
• Customer CPE WAN Port CPE places traffic into
  configured output queues based on identifiers
  sent toward PR

Packet flow
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Traffic Flow- Ingress

• PR Ingress
• Traffic arrives at the PR which checks for
  identifiers and if it matches, it sends to the
  associated policer
• if it exceeds the policer, an action is taken
  (for Premium and Premium Plus it is dropped)
• if it does not exceed the policer, it is counted,
  the loss-priority is set, the forwarding class is
  set
• The core configuration then looks at the
  loss-priority and forwarding class that has been
  set, and sets the EXP to one of 6 values

GC IPVPN
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Traffic Flow

• IP VPN Network Backbone
• Differentiated traffic is sent through the IP
  VPN network cloud

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Destination PR- Egress

• Destination PR- Egress
• Based on the EXP bit setting and loss priority
  bit, the traffic will be queued on egress for all
  6 CoS
• Traffic is taken from the queues and placed on
  the outbound interface

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Flexible - IP VPN Billing Models

• All billing models have the following
• Ability to tier bandwidth the overall amount of
  traffic (except for load balancing)
• Policing for the Premium, Premium Plus, GC VOIP
  and GC Video traffic.
• A port charge will be billed for every billing
  model
• All billing will be aggregated for each overall
  Class of Service (Enhanced/Enhanced Plus will be
  added together, Basic/Basic Plus will be added
  together, and Premium/Premium Plus will be added
  together.)
• Each overall Class of Service will have one
  billing rate (Enhanced/Enhanced Plus will be one
  rate, Basic/Basic Plus will be one rate, and
  Premium/Premium Plus will be one rate)
• All default traffic/untagged traffic will
  selected by the customer to be Basic, Basic Plus,
  Enhanced or Enhanced Plus
• Billing models will only be applicable to on-net
  sites.

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Real Time Class of Service Considerations

• Real time traffic is separated into three
  different products
• Global Crossing VOIP (Premium Plus)
• Global Crossing VIDEO (Premium Plus)
• DATA Premium and Premium Plus
• Each real time type of traffic
• Is identified separately
• Is policed separately (Bandwidth does NOT
  overlap)
• Combined real-time traffic never exceeds port
  speed
• Always is prioritized over Enhanced /Enhanced
  Plus or Basic /Basic Plus Traffic