CCNP SP MPLS FAQ: IP Tunneling to MPLS/VPN Migration Case Study
Q1. List two of the several items that must be addressed during the migration planning stage.
Figure: SampleNet Central Site Migration Scenario
Answer:
• Define the deployment requirements.
• Assign the necessary naming conventions.
• Define the RD and RT format.
• Define the PE-CE link addressing.
• Define the VRFs that provide the VPN connectivity.
• Define the rules for using RD and RT in VRFs.
• Define the deployment requirements.
• Assign the necessary naming conventions.
• Define the RD and RT format.
• Define the PE-CE link addressing.
• Define the VRFs that provide the VPN connectivity.
• Define the rules for using RD and RT in VRFs.
Q2. When provisioning the VRFs, what are the two main items that must be configured?
Answer: The route distinguisher (RD) and the route target (RT) import/export policies.
Q3. When provisioning the VRFs, is it necessary to have the same values for the RD and RT?
Answer: No. Although both values can be the same, there is no requirement because they are completely independent entities.
4: When allocating RT and RD values, what should you use as the first part of the value?
Answer: The service provider’s AS number.
