The Cisco CSR 1000V is a software router that an enterprise or a cloud provider can deploy as a virtual machine in a provider-hosted cloud. It can run on Cisco UCS servers or servers from leading vendors that support VMware ESXi virtualization. It contains Cisco IOS software networking and security features. A typical cloud provides IT infrastructure and resources to multiple customers or tenants. The Cisco CSR 1000V serves primarily as a router per tenant. That is, each tenant gets its own routing instance, hence its own VPN connections, firewall policies, QoS rules, access control, and so on.