Circuits/VCs Provisioning Overview
Cisco EPN Manager supports provisioning of circuits/VCs for various technologies such as Carrier Ethernet (CE), Optical/DWDM, L3VPN, Circuit Emulation, Segment Routing, and MPLS Traffic Engineering. Mostly, a circuit spans across multiple devices. You must make configuration changes across multiple devices to provision a circuit. Cisco EPN Manager provides a Provisioning Wizard that allows you to make the required configuration changes across multiple devices that participate in a circuit.
The Provisioning Wizard collects all the required information in a step-by-step approach and generates the required configuration for all the devices. You can review the configurations generated for each device, and then choose to either make any changes in the service parameters or deploy the configurations to the devices.
The configuration changes are deployed to the participating devices as an 'atomic' transaction. Cisco EPN Manager does a best-effort attempt to either carry out all these operations together or does none at all. To implement the concept of 'atomic' transaction, Cisco EPN Manager has the rollback feature, which helps to recover from failures during provisioning.
When configuring multiple devices, if the configuration fails in any of the devices, Cisco EPN Manager does a best-effort to rollback the configuration changes made so far in all the participating devices. The device configuration states are restored to the same state, which was there before the provisioning operation was attempted.