2,196 research outputs found
ICONA: Inter Cluster ONOS Network Application
Several Network Operating Systems (NOS) have been proposed in the last few
years for Software Defined Networks; however, a few of them are currently
offering the resiliency, scalability and high availability required for
production environments. Open Networking Operating System (ONOS) is an open
source NOS, designed to be reliable and to scale up to thousands of managed
devices. It supports multiple concurrent instances (a cluster of controllers)
with distributed data stores. A tight requirement of ONOS is that all instances
must be close enough to have negligible communication delays, which means they
are typically installed within a single datacenter or a LAN network. However in
certain wide area network scenarios, this constraint may limit the speed of
responsiveness of the controller toward network events like failures or
congested links, an important requirement from the point of view of a Service
Provider. This paper presents ICONA, a tool developed on top of ONOS and
designed in order to extend ONOS capability in network scenarios where there
are stringent requirements in term of control plane responsiveness. In
particular the paper describes the architecture behind ICONA and provides some
initial evaluation obtained on a preliminary version of the tool.Comment: Paper submitted to a conferenc
VINEA: a policy-based virtual network embedding architecture
Network virtualization has enabled new business models by allowing infrastructure providers to lease or share their physical network. To concurrently run multiple customized virtual network services, such infrastructure providers need to run a virtual network embedding protocol. The virtual network embedding is the (NP-hard) problem of matching constrained virtual networks onto the physical network.
We present the design and implementation of a policy-based architecture for the virtual network embedding problem. By policy, we mean a variant aspect of any of the (invariant) embedding mechanisms: resource discovery, virtual network mapping, and allocation on the physical infrastructure. Our architecture adapts to different scenarios by instantiating appropriate policies, and has bounds on embedding efficiency and on convergence embedding time, over a single provider, or across multiple federated providers. The performance of representative novel policy configurations are compared over a prototype implementation. We also present an object model as a foundation for a protocol specification, and we release a testbed to enable users to test their own embedding policies, and to run applications within their virtual networks. The testbed uses a Linux system architecture to reserve virtual node and link capacities.National Science Foundation (CNS-0963974
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