If you need a free, unlimited Cisco router image without a 90-day limit, consider:

On the download page, ensure that "Cloud Services Router 1000V" is selected as your product.

Choose the latest or a stable release (e.g., Denali or Everest).

Upload the QCOW2 file to that directory and rename it to virtioa.qcow2 .

Click on the latest recommended (e.g., 17.9.x or 17.12.x). Note: For lab testing, pick the latest “ED” (Early Deployment) or “GD” (General Deployment) release.

Downloading Cisco proprietary software from unauthorized mirrors violates Cisco's End User License Agreement (EULA).

Even with the speed limit, you get access to routing protocols (OSPF, BGP), VPN technologies (DMVPN, IPsec), and security features.

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The CSR 1000v runs best on VMware ESXi, though it also supports KVM and Hyper-V.

OVA files are a type of virtual appliance package that contains a virtual machine (VM) in a single file. This file includes all the components necessary to deploy a VM, such as the virtual disk, configuration data, and other metadata. OVA files simplify the deployment process for virtual appliances, as they can be easily imported into virtualization platforms like VMware vSphere.

To manage the virtual router outside of the vSphere console client, configure a local user account, domain name, and cryptographic keys to support SSH: