In order to complete this recipe, you should have access to a Python 2.7 development environment and a JUNOS OS router that you have configuration rights on. You should be faimilar with the PyEZ patterns used in this chapter until now, and you should also be familiar with using PyEZ to load configurations.
First of all, we’re going to look at a typical simple configuration representing a customer’s service and identify the invariants – the components that never change. We can represent these components in the template statically. In our basic customer configuration, we might configure these aspects:
- Point-to-point interface to the customer site equipment
- VLAN encapsulation
- Association with a private routing-instance
- Static ...