| 1. |
- Alfredsson, Rebecka, et al.
(författare)
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Accelerating a Transport Layer based 5G Multi-Access Proxy on SmartNIC
- 2022
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Ingår i: Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22). - : Würzburgs universitet. ; , s. 4-
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Utilizing multiple access technologies such as 5G,4G, and Wi-Fi within a coherent framework is currentlystandardized by 3GPP within 5G ATSSS. Indeed, distributingpackets over multiple networks can lead to increased robustness,resiliency and capacity. A key part of such a framework isthe multi-access proxy, which transparently distributes packetsover multiple paths. As the proxy needs to serve thousands ofcustomers, scalability and performance are crucial for operatordeployments. In this paper, we leverage recent advancementsin data plane programming, implement a multi-access proxybased on the MP-DCCP tunneling approach in P4 and hardwareaccelerate it by deploying the pipeline on a smartNIC. Thisis challenging due to the complex scheduling and congestioncontrol operations involved. We present our pipeline and datastructures design for congestion control and packet schedulingstate management. Initial measurements in our testbed showthat packet latency is in the range of 25 μs demonstrating thefeasibility of our approach.
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| 2. |
- Bhamare, Deval, et al.
(författare)
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IntOpt : In-band Network Telemetry optimization framework to monitor network slices using P4
- 2022
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Ingår i: Computer Networks. - : Elsevier. - 1389-1286 .- 1872-7069. ; 216
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Tidskriftsartikel (refereegranskat)abstract
- The emergence of Network Functions Virtualization (NFV) is being heralded as an enabler of the recent technologies such as 5G/6G, IoT and heterogeneous networks. Existing NFV monitoring frameworks either do not have the capabilities to express the range of telemetry items needed to perform management or do not scale to large traffic volumes and rates. We present IntOpt, a scalable and expressive telemetry system designed for flexible NFV monitoring using active probing and P4. IntOpt allows us to specify monitoring requirements for individual service chain, which are mapped to telemetry item collection jobs that fetch the required telemetry items from P4 programmable data-plane elements. We propose mixed integer linear program (MILP) as well as a simulated annealing based random greedy (SARG) meta-heuristic approach to minimize the overhead due to active probing and collection of telemetry items. Using P4-FPGA, we benchmark the overhead for telemetry collection. Our numerical evaluation shows that the proposed approach can reduce monitoring overheads by 39% and monitoring delays by 57%. Such optimization may as well enable existing expressive monitoring frameworks to scale for larger real-time networks.
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| 3. |
- Bhamare, Deval, et al.
(författare)
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IntOpt: In-Band Network Telemetry Optimization for NFV Service Chain Monitoring
- 2019
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Ingår i: 2019 IEEE International Conference on Communications (ICC) Próceedings. - : IEEE. - 9781538680896 - 9781538680889
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Konferensbidrag (refereegranskat)abstract
- Managing and scaling virtual network function(VNF) service chains require the collection and analysis ofnetwork statistics and states in real time. Existing networkfunction virtualization (NFV) monitoring frameworks either donot have the capabilities to express the range of telemetryitems needed to perform management or do not scale tolarge traffic volumes and rates. We present IntOpt, a scalableand expressive telemetry system designed for flexible VNFservice chain network monitoring using active probing. IntOptallows to specify monitoring requirements for individual servicechain, which are mapped to telemetry item collection jobsthat fetch the required telemetry items from P4 (programmingprotocol-independent packet processors) programmable dataplaneelements. In our approach, the SDN controller creates theminimal number of monitoring flows to monitor the deployedservice chains as per their telemetry demands in the network.We propose a simulated annealing based random greedy metaheuristic(SARG) to minimize the overhead due to activeprobing and collection of telemetry items. Using P4-FPGA, webenchmark the overhead for telemetry collection and compareour simulated annealing based approach with a na¨ıve approachwhile optimally deploying telemetry collection probes. Ournumerical evaluation shows that the proposed approach canreduce the monitoring overhead by 39% and the total delays by57%. Such optimization may as well enable existing expressivemonitoring frameworks to scale for larger real-time networks.
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| 4. |
- Brisch, Fabian, et al.
(författare)
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Accelerating Transport Layer Multipath Packet Scheduling for 5G-ATSSS
- 2023
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Konferensbidrag (refereegranskat)abstract
- Utilizing multiple access networks such as 5G, 4G, and Wi-Fi simultaneously can lead to increased robustness, resiliency, and capacity for mobile users. However, transparently implementing packet distribution over multiple paths within the core of the network faces multiple challenges including scalability to a large number of customers, low latency, and high-capacity packet processing requirements. In this paper, we offload congestion-aware multipath packet scheduling to a smartNIC. However, such hardware acceleration faces multiple challenges due to programming language and platform limitations. We implement different multipath schedulers in P4 with different complexity in order to cope with dynamically changing path capacities. Using testbed measurements, we show that our CMon scheduler, which monitors path congestion in the data plane and dynamically adjusts scheduling weights for the different paths based on path state information, can process more than 3.5 Mpps packets 25 μs latency.
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| 5. |
- Dahlberg, Rasmus, et al.
(författare)
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Aggregation-Based Certificate Transparency Gossip
- 2019
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Ingår i: Proceedings of the The Thirteenth International Conference on Emerging Security Information, Systems and Technologies - SECURWARE 2019, October 27, 2019 to October 31, 2019 - Nice, France. - : International Academy, Research and Industry Association (IARIA). - 9781713800521
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Konferensbidrag (refereegranskat)abstract
- Certificate Transparency (CT) requires that every certificate which is issued by a certificate authority must be publicly logged. While a CT log can be untrusted in theory, it relies on the assumption that every client observes and cryptographically verifies the same log. As such, some form of gossip mechanism is needed in practice. Despite CT being adopted by several major browser vendors, no gossip mechanism is widely deployed. We suggest an aggregation-based gossip mechanism that passively observes cryptographic material that CT logs emit in plain text, aggregating at packet processors (such as routers and switches) to periodically verify log consistency off-path. In other words, gossip is provided as-a-service by the network. Our proposal can be implemented for a variety of programmable packet processors at line-speed without aggregation distinguishers (throughput), and, based on 20 days of RIPE Atlas measurements that represent clients from 3500 autonomous systems, we show that significant protection against split-viewing CT logs can be achieved with a realistic threat model and an incremental deployment scenario.
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| 7. |
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| 8. |
- Vestin, Jonathan, 1989-, et al.
(författare)
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CloudMAC : Towards Software Defined WLANs
- 2012
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Ingår i: Mobicom '12 Proceedings of the 18th annual international conference on Mobile computing and networking. - New York, NY, USA : Association for Computing Machinery (ACM). - 9781450311595 ; , s. 393-396
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Konferensbidrag (refereegranskat)
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| 9. |
- Vestin, Jonathan, 1989-, et al.
(författare)
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FastReact : In-Network Control And Caching For Industrial Control Networks Using Programmable Data Planes
- 2018
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Ingår i: 2018 IEEE 23RD INTERNATIONAL CONFERENCE ON EMERGING TECHNOLOGIES AND FACTORY AUTOMATION (ETFA). - : IEEE. - 9781538671085 ; , s. 219-226
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Konferensbidrag (refereegranskat)abstract
- Providing network reliability as well as low and predictable latency is important especially for Industrial Automation and Control Networks. However, diagnosing link status from the control plane has high latency and overhead. In addition, the communication with the industrial controller may impose additional network latency. We present FastReact - a system enabling In-Network monitoring, control and caching for Industrial Automation and Control Networks. FastReact outsources simple monitoring and control actions to evolving programmable data planes using the P4 language. As instructed by the Industrial Controller through a Northbound API, the SDN controller composes control actions using Boolean Logic which are then installed in the data plane. The data plane parses and caches sensor values and performs simple calculations on them which are connected to fast control actions that are executed locally. For resiliency, FastReact monitors liveness and response of sensors/actuators and performs a fast local link repair in the data plane if a link failure is detected. Our testbed measurement show that FastReact can reduce the sensor/actuator delay while being resilient against several failure events.
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| 10. |
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