Information About Remote Server Support for ZTP Upgrade
You can onboard and upgrade numerous Cisco IOS XE Catalyst SD-WAN devices together, using the software images hosted on a remote server. The physical WAN edge onboard and upgrade options include the following:
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Manual
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Bootstrap
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Automated deployment
In Cisco IOS XE Catalyst SD-WAN Release 17.9.1a and earlier, the software upgrade images are hosted only on Cisco SD-WAN Manager. During the software upgrade process, the devices fetch the upgrade information from Cisco SD-WAN Manager to upgrade the devices with the latest software.
From Cisco IOS XE Catalyst SD-WAN Release 17.10.1a, remote server support for ZTP upgrades enables you to upgrade Cisco IOS XE Catalyst SD-WAN devices using the software images stored in a remote server. The remote server support for ZTP upgrade feature enables you to register a remote server with Cisco SD-WAN Manager and add locations of the software images that are present in the remote server to theCisco SD-WAN Manager software repository. When you upgrade a device, the device downloads the new software image from the remote server, without overwhelming the Cisco SD-WAN Manager server.
When using the Cisco Catalyst SD-WAN hosted service, it is possible to enforce a version of the Cisco SD-WAN software to run on a router as it joins the fabric for the first time. When you enable ZTP, you can see the platform version and status details of the devices running on a router. For example, ISR1101 Disabled, C8000AES Disabled, ISR4400 Disabled, C8000AEP Disabled, ASR1001-X Disabled and so on.