Latency-Aware Optimization of Service Chain Allocation with Joint VNF Instantiation and SDN Metro Network Control

Abstract

This demonstration showcases the open-source Net2Plan tool optimally computing and provisioning Service Chain requests with latency considerations by interfacing to an ONOS-controlled metro network and an ETSI-OSM instance orchestrating a set of OpenStack VIMs.

The Net2Plan-OpenStack Project: IT Resource Manager for Metropolitan SDN/NFV Ecosystems

“…The second component, identified as carrier represents a network operator requesting the deployment of a network service so that Net2Plan assists OSM for the SC computation and NFV instantiation, and ONOS for the flow allocation. Additionally, this demonstration expands [11] emulating an IP-over-WDM transport network with ONOS, expanding the original single layer view.…”

“…On the one hand, the IT resource manager employs the (new) open-source Net2Plan extension for interfacing multiple OpenStack instances which enables multi-tenant slicing, IT resource visualization and VM migration. On the other hand, the carrier leverages on our previous work [11] to deploy a network service performing SC computation and NFV instantiation. The network service is deployed, based on the assistance of the IT resource manager, transparently as a slice in a multi-tenant infrastructure (functionality (i) multitenant IT slicing) with awareness of the internal resources of the datacenters (functionalities (ii) advanced IT resource visualization and (iii) intra-cluster VM migration).…”

“…The Carrier(s) module emulates the behavior of a network operator that requests the deployment of a network service through the GUI of Net2Plan. This module is a Net2Plan plugin based on our experience in previous demonstrations to perform SC computation which represents an evolution of the classical Path Computation Element (PCE) tuned for service chain allocations, where the path is constrained to traverse a sequence of VNFs [11]. The combination of path computation and VNF placement decision is implemented as an algorithm in this Net2Plan plugin.…”

“…A (new) IT resource manager module proves advanced joint control and management of multiple OpenStacks-based data centers in a metropolitan IP-over-WDM network. A carrier module, based on our previous experience [11], here extended with an IP-over-WDM flavor, requests the deployment of an inter-node service chain that is internally optimized in the Net2Plan implementation for assisting OSM on the NFV instantiation, and ONOS for the flow allocation.…”

“…Within the Metro-Haul scenario, we recently demonstrated the open-source planning tool Net2Plan [9] assisting an OSM instance in the optimal allocation and instantiation of network services (SCs) in a simulated transport network [10]. Subsequently, our demonstration in [11] included an ONOS controller to emulate the packet-layer network and considered the end-to-end latency requirements to perform the SC allocation, VNF instantiation and flow allocation.…”