You Have Been Asked to Establish a Design That Will

question 212

Multiple Choice

You have been asked to establish a design that will allow your company to migrate from a WAN service to a Layer 3 VPN service. In your design, you are keeping some WAN links between critical sites as a backup for this service. You plan to use OSPF as your IGP and BGP for the PE-CE protocol. When the Layer 3 VPN service is available, how will you prevent transit traffic over the backup links?

• A) Redistribute routes at the CE as external type 1.
• B) Redistribute routes at the CE as external type 2.
• C) Use conditional advertisement only when the Layer 3 service is down.
• D) Manually turn off the backdoor link when the Layer 3 service is up.