Question

You are writing a Python script using the ncclient library to push OSPF configuration to an IOS-XE device over NETCONF. The configuration XML includes a new OSPF process and several network statements. Requirements: if any part of the OSPF config is rejected by the device, the entire change must be rolled back automatically so the router is never left in a partial state, and the script must raise an exception for the CI/CD pipeline to catch. Which approach best satisfies these requirements?

Accepted Answer

Use manager.edit_config with target='candidate', wrap it in a try/except that calls manager.discard_changes() on RPCError, and only manager.commit() after a successful edit

Answer

Use manager.edit_config with target='running' and default-operation='merge', then call manager.commit() after each network statement individually

Answer

Use manager.edit_config with target='running' and error-option='continue-on-error' so remaining statements still apply if one fails

Answer

Use manager.copy_config to overwrite the running datastore directly with the new OSPF XML payload