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This paper dissects the source of forwarding latency on the data plane in proactive SDN, and reveals that TCAM insertions with increasing priority can lead to incredibly large forwarding delay. As far as we know, this is the first work that identifies the pseudo-TCP congestion problem caused by long data plane latency. Preliminary experimental results on forwarding delay and TCP performance are presented.
This paper studies information dissemination in wireless ad hoc networks, using standard routing protocols, such as OLSR, as well as Information-Centric Networking. We performed simulations using NS-3 and ndnSIM with different node counts and transport protocols. Our simulations show that TCP performs better in lower hop count scenarios, while NDN performs better in higher hop count scenarios.
In Named Data Networking (NDN), routers have caches to store frequently requested contents, and hence cache management scheme becomes a key factor for efficient content delivery. In this paper, we propose the sharing of cache summaries using a Bloom filter among neighboring routers for efficient content delivery and high cache utilization at NDN. When an Interest packet is received, a router can forward...
This paper explores the feasibility of entirely disaggregated memory from compute and storage for a particular, widely deployed workload, Spark SQL [9] analytics queries. We measure the empirical rate at which records are processed and calculate the effective memory bandwidth utilized based on the sizes of the columns accessed in the query. Our findings contradict conventional wisdom: not only is...
The P4 language is an emerging domain-specific language for describing the data plane processing at a network device. P4 has been mapped to a wide range of forwarding devices including NPUs, programmable NICs and FPGAs, except for General Purpose Graphics Processing Unit (GPGPU) which is a salient parallel architecture for processing network flows. In this work, we design a heterogeneous architecture...
By means of a management framework and programmable routing tables, Software Defined Network (SDN) architectures offer network's adaptability to today's computer systems. In Networks-on-Chip (NoC) based systems, management methods have been implemented as specific solutions unable to be reused in further designs. A Software Defined NoC (SDNoC) architecture will permit on-the-fly re/configuration and...
Connection setup in software-defined networks (SDN) requires considerable amounts of processing, communication, and memory resources. Attackers can target SDN controllers with simple attacks to cause denial of service. We proposed a defense mechanism based on a proof-of-work protocol. The key characteristics of this protocol, namely its one-way operation, its requirement for freshness in proofs of...
With a bandwidth reservation mechanism, we propose that LTE can assist existing WiFi networks to improve the Quality of Experience (QoE) of wireless communication in enterprise and meanwhile increase the available spectrum. To address the associated network selection problem between WiFi and LTE, in this paper based on the 3GPP standard Access Network Discovery and Selection Function (ANDSF) framework,...
Named Data Networking (NDN), an information-centric Internet architecture, introduces a new forwarding model, in which the forwarding plane can choose between multiple interfaces when forwarding a packet. While the forwarding module brings new opportunities it also introduces challenges when the application's performance or correctness is affected by a conflict between the application design and the...
Buffering architectures and policies for their efficient management constitute one of the core ingredients of a network architecture. In this work we introduce a new specification language, BASEL, that allows to express virtual buffering architectures and management policies representing a variety of economic models. BASEL does not require the user to implement policies in a high-level language; rather,...
Software-Defined Networking (SDN) provides the capability to steer traffic in a network to lower the management cost. Network Function Virtualization (NFV) gives the chance to implement network functions at the right time and the right place to increase operation flexibility. Together SDN and NFV show the potential to create an agile system with a low operations cost and a high customer satisfaction...
Network packet classification is a key functionality for packet filters and firewalls, and its performance is crucial for such systems to maintain a high packet throughput under heavy load situations. However, many existing packet filters employ slow classification algorithms which cannot provide the required lookup performance due to slow rule set traversal. In this work, we address this problem...
The most demanding tenants of shared clouds require complete isolation from their neighbors, in order to guarantee that their application performance is not affected by other tenants. Unfortunately, while shared clouds can offer an option whereby tenants obtain dedicated servers, they do not offer any network provisioning service, which would shield these tenants from network interference. In this...
In this paper, we propose ParaRegex, a novel approach for fast parallel regular expression matching. ParaRegex is a framework that implements data-parallel regular expression matching for deterministic finite automaton based methods. Experimental evaluation shows that ParaRegex produces a fast matching engine with speeds of up to 6 times compared to sequential implementations on a commodity 8-thread...
Software defined networks provide new opportunities for automating the process of network debugging. Many tools have been developed to verify the correctness of network configurations on the control plane. However, due to software bugs and hardware faults of switches, the correctness of control plane may not readily translate into that of data plane. To bridge this gap, we present VeriDP, which can...
Many in the networking community believe that Software-Defined Networking, in which entire networks are managed centrally, has the potential to revolutionize the field. However, SDN faces several challenges that have prevented its wide-spread adoption. Current SDN technologies, such as OpenFlow, provide powerful and flexible APIs, but can be unreasonably complex for implementing nontrivial network...
The live migration technology of virtual machine is very helpful for dynamic workload balance, server consolidation and fault tolerance in cloud computing environment. It is important to build live migration strategies which lead to low migration time, thus helping reduce migration cost while achieving migration goal. So we look into the topic of building a model to quantitatively predict live migration...
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