Cisco hardware routers are normally shipped with the Cisco IOS XE software pre-installed. Because the Cisco CSR 1000v Series Cloud Services Router is not hardware-based, you must download the Cisco IOS XE software from Cisco.com and install it directly onto the virtual machine. However, as part of the initial installation process, you must first provision the attributes of the VM so that the Cisco CSR 1000v software can install and boot.

Note	For information about deploying the Cisco CSR 1000v in an Amazon Web Services environment, seehttp://www.cisco.com/c/en/us/td/docs/routers/csr1000/software/aws/csraws.html.

Note	For information about deploying the Cisco CSR 1000v in a Microsoft Azure environment, see http://www.cisco.com/c/en/us/td/docs/routers/csr1000/software/azu/csrazure.html.

The figure below ("Cisco CSR 1000v Installation Task Workflow") shows the high-level tasks required to install the Cisco CSR 1000v on the VM. The different installation options are dependent on the hypervisor being used. See the following sections for more information.

The following software images are available for installing the Cisco CSR 1000v on the supported hypervisors.

• .ova

Used for deploying the OVA template on the VM (in TAR format)

• .iso

Used for installing the software image on the VM (requires manually creating the VM)

• .qcow2

Used for installing the software image in KVM OpenStack environments.

• .run

(Cisco IOS XE 3.16 and later, and Cisco IOS XE Denali 16.3.1 and later) Self-installing image used for installation in a KVM environment.

• .bin

These images are used for upgrading and downgrading the software only. For more information, see Prerequisites for the Software Upgrade Process and subsequent sections.

Note	(Cisco IOS XE Everest 16.5 and later) On AWS, you can use the Cisco CSR 1000v .bin file to upgrade the version of Cisco CSR 1000v, without having to recreate AWS EC2 instance from a new AMI. This inline upgrade process is not yet available on Microsoft Azure.

Note	(Cisco IOS XE Everest 16.4 and earlier) You cannot use the Cisco CSR 1000v .bin file to upgrade AMIs obtained from Amazon Web Services. You must create a new AMI instance and migrate your configuration and licenses.

The Cisco CSR 1000v supports the following installation options:

• Deploy the OVA template on the VM.

  Uses the .ova file. This template creates a VM using recommended preset values. See Deploying the Cisco CSR 1000v OVA to the VM using vSphere and Deploying the Cisco CSR 1000v OVA to the VM using COT.

  The .ova file can be used only for first-time installation. It cannot be used for upgrading the Cisco IOS XE software version.

• Deploy the .ova file on the VM using the Common OVF Tool (COT).

  The COT application is included in the file package. However, to ensure that you are using the latest version of COT, download COT directly from the GitHub site:

  https://github.com/glennmatthews/cot/blob/master/README.md

  Using the COT application, you can customize the VM values and easily deploy the custom VM as part of the Cisco CSR 1000v installation process. See Editing the Basic Properties of Cisco CSR 1000v using vSphere.

Note	The COT application is recommended in place of the BDEO tool, which is used in early releases of Cisco IOS XE.

• Manually configure the VM using the .iso file.

  Uses the .iso file. You can install the .iso file on your host and manually create the VM using your hypervisor software. For example, if you are installing the Cisco CSR 1000v on VMware, you would install the .iso file on the VMware ESXi host, and manually create the VM using the vSphere GUI. See the following sections:

  • Manually Creating the Cisco CSR 1000v VM Using the .iso File (VMware ESXi)

  • Manually Creating the Cisco CSR 1000v VM Using the .iso File (Citrix XenServer)

  • Creating the Cisco CSR 1000v VM Using virt-install with ISO Image

  • Prerequisites for Manually Creating the CSR 1000v VM using the .iso File

• Create the Cisco CSR 1000v instance in KVM using OpenStack

Uses the .qcow2 file. The qcow2 (QEMU Copy on Write) image format is used to create the Cisco CSR 1000v tenant in the KVM OpenStack cloud environment. See Selecting a Cisco CSR 1000v Installation Image onwards.

Be aware of the following general guidelines and restrictions before installing the Cisco CSR 1000v in your network:

• The Cisco CSR 1000v may properly function within a nested VM, but this is not tested nor supported.

• If the hypervisor does not support vNIC Hot Add/Remove, do not make any changes to the VM hardware (memory, CPUs, hard drive size, and so on) while the VM is powered on.

• (Cisco IOS XE Release 3.11S and later) The GigabitEthernet0 interface is no longer available. You can designate any interface as the management interface.

• (Cisco IOS XE Release 3.10S and earlier) The GigabitEthernet0 interface is the default management port and cannot be changed.

• The Cisco IOS XE CLI can be accessed either through the virtual VGA console or the console on the virtual serial port. The console can be selected from GRUB mode during the first-time installation, or it can be changed using the Cisco IOS XE platform console command after the router boots. For more information, see Booting the Cisco CSR 1000v as the VM.

Note	Some hypervisors may not support serial console access. Verify support using your hypervisor documentation.

The Cisco CSR 1000v, which is software-based, does not include a ROMMON image. This differs from many Cisco hardware-based routers. During the initial bootloader process, the installation script creates a clean version of the Cisco CSR 1000v software image known as the Golden Image and places it in a non-accessible partition. This clean version can be used if the software image is not working properly or is not bootable.

Note that although the Cisco CSR 1000v does not include ROMMON, the platform does include a GNU GRand Unified Bootloader (GRUB)-based bootloader. The GRUB function on the Cisco CSR 1000v provides more limited functionality compared to the ROMMON available on other Cisco platforms.

Note that although ROMMON is not present on the Cisco CSR 1000v, some Cisco IOS XE commands such as show version may show references to ROMMON in the command output.

Note	After the Cisco CSR 1000v completes the first-time installation, you can configure the router to automatically enter GRUB mode when the router is booted. For more information, see Activating Cisco CSR 1000v Licenses and subsequent licensing sections.

See the information in the sections below, about installing the Cisco CSR 1000v in different hypervisor environments:

• VMware ESXi Support Information

• Microsoft Hyper-V Support Information

• Citrix XenServer Support Information

• Kernel Virtual Machine Support Information

Note	For information about deploying the Cisco CSR 1000v in an Amazon Web Services environment, see the Cisco CSR 1000V Series Cloud Services Router Deployment Guide for Amazon Web Services.

Note	For information about deploying the Cisco CSR 1000v in a Microsoft Azure environment, see the Cisco CSR 1000v Deployment Guide for Microsoft Azure.