On-path vs off-path traffic steering, that is the question
Authors: 
Karima Khandaker, Dirk Trossen, Jinze Yang, Zoran Despotovic, Georg CarleAuthors Info & Claims
Karima Khandaker, Dirk Trossen, Jinze Yang, Zoran Despotovic, Georg CarleAuthors Info & ClaimsPages 37 - 42
Abstract
Service-level traffic steering in the Internet has been using an indirection-based model for decades now, using the DNS to resolve a name to a locator, often complemented with load balancing techniques. Contrasting this off-path realization, service information as part of the data packet itself may determine the one of possibly many communication endpoints on-path while traversing the network. This paper compares both design choices regardless of the specific decision mechanism used. For this, we assume a compute-aware traffic steering mechanism for both approaches and determine latency penalties through off-path resolution steps as well as distributing scheduling decisions to on-path network ingress points. Lastly, we investigate latency variances and resilience in an AR/VR scenario.
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August 2022
105 pages
ISBN:9781450393287
DOI:10.1145/3527974
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Published: 23 September 2022
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