Question

You are writing a Python script that uses the requests library and RESTCONF (RFC 8040) to add a new VLAN (VLAN 250) to an IOS-XE device. The VLAN does not yet exist in the running datastore, and you must ensure the operation FAILS if the resource already exists (to avoid silently overwriting an existing VLAN configuration). Which HTTP method and target URI approach correctly implements this requirement?

Accepted Answer

POST to the collection resource /restconf/data/Cisco-IOS-XE-native:native/vlan with the new vlan-list entry in the body

Answer

PUT to the specific resource /restconf/data/Cisco-IOS-XE-native:native/vlan/vlan-list=250 with the vlan-list entry in the body

Answer

PATCH to the collection resource /restconf/data/Cisco-IOS-XE-native:native/vlan with the new vlan-list entry in the body

Answer

GET the collection first, then PUT the entire vlan container back with VLAN 250 appended