The VEM is configured from the VSM and provides switching between servers. The VEM is similar to a traditional switch line card. The VEM is embedded with the VMware ESX or ESXi hypervisor. The Cisco Nexus 1000V cloud switch manages multiple Virtual Ethernet Modules (VEM). The VEM is part of the hypervisor and the VSM is a virtual appliance. The Cisco Nexus 1000V switch primary components including a Virtual Ethernet Module (VEM) and Virtual Supervisor Module (VSM). That would include cloud instances and the enterprise network. The Nexus 1000V virtual switch forwards packets to the CSR 1000V for all external destination subnets including VLANs. The purpose of virtual service nodes is to provide networking services to cloud traffic. The traffic is redirected by vPath between server VMs and virtual service nodes. The virtual switch supports 802.1q VLAN trunking to virtual and physical switches. The Cisco Nexus 1000V virtual switch provides Layer 2 campus switching between virtual machines. Table 1 Cloud Platform Support for Hypervisors Table 1 describes hypervisor and operating system support for the most common virtual switches. The primary considerations for deploying applications include hypervisor and operating system support provided by the cloud provider. The software for any cloud deployment is selected based on requirements and feature support. It is part of the larger software defined networking architecture that enables physical transport layer abstraction and device programmability for cloud-based applications. The virtual service nodes include Virtual Security Gateway (VSG), ASAv firewall, 1000V InterCloud, NetScaler Load Balancer and vWAAS. The virtualized platform include server virtual machines and virtual service nodes.įigure 1 Network Virtualization Platforms In addition it provides cloud tunnel connectivity and policy-based orchestration for the virtualized platform. The virtual switch manages control plane and data plane forwarding. The virtual switch is based on the Nexus NX-OS switching platform. There is a version for Microsoft Hyper-V and Open KVM as well for additional public cloud and platform support. Cisco Nexus 1000V switch is compatible with VMware ESX and vSphere (ESXi) hypervisors. It provides integration of physical and virtualized network infrastructure. Cisco Nexus 1000V cloud switch is a virtual appliance.

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