VDC Network Isolation and QoS Guarantees Sample Clauses

VDC Network Isolation and QoS Guarantees. To guarantee the isolation of tenants with concurrent VDCs, both compute and network resources of different VDCs should not interfere with one another. For the network this ensures that strict Quality of Service (QoS) guarantees should be met. The VDC service must ensure that any programming of the virtual network infrastructure affects only the VDC for which the modification request originated. Thus, a service must sit between each VDC and the SDN controller to validate any flow creation or modifications, effectively providing a virtual SDN controller. Table 4 summarizes the main interactions between the orchestrator and the SDN controller to achieve this purpose. Table 4 – Summary of interaction between the orchestrator and the SDN controller for VDC network isolation and QoS guarantees Orchestrator required action/information and involved modules SDN service/request Information VDC provider VDC client -Neutron Flows to program virtual network instances -Virtual Tenant Network Manager Ensure that a flow will affect only the traffic of the source VDC by creation of proper filters in the Flow modification messages: -Pass -Drop -Redirect Must validate VDC flow programming requests Must be able to install flows to manage own virtual network infrastructure corresponding Virtual Tenant Network (VTN) instance
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VDC Network Isolation and QoS Guarantees. The VDC service must be able to configure arbitrary slices and flows while the VDC client must also have access to some programmable network features. However, the VDC service acts as an intermediary to ensure the validity of the client programming attempts. If the request is not valid e.g. an attempt to install a flow on an unallocated device, it can be rejected before being passed to the SDN controller. To configure the desired flows, the VDC service contacts the VTN Manager module at the ODL SDN controller. The VTN Manager is responsible to guarantee the proper flow isolation within a virtual slice, since isolation between optical slices (i.e. VDC instances) is guaranteed at the physical layer by reserving independent optical resources (e.g. wavelengths) for each one of them. Figure 13 depicts an example of interaction for requesting and validating flows to be configured in an optical slice. Figure 13 – Workflow for VDC flow configuration and validation 5.2 vApp Use Case
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