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21.
Traffic Engineering as an SDN App
SDN App manages traffic demand
• Current as well as future
• IGP does not have to signal available bandwidth
• Push based telemetry or netflow based matrices can be generated
SDN App computes paths and allocates bandwidth
• Centralization yields better resource optimization
• Only creates as many tunnels as necessary
SDN App adapts to failures and repairs
• No race conditions after failures and repairs
Segment routing can be used as a simplification
• SDN controller makes this an abstraction for the APP
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