Which type of overlay VPN is simplest to implement?
A.
Fully-meshed
B.
Hub-and-spoke
C.
Partial-mesh
D.
Redundant hub-and-spoke
Explanation:
This type requires the least number of vpn connections and the routing is so simple that you don’t
even need to run a routing protocol (though it would simplify your daily administration..)
The hub-and spoke topology is the simplest overlay VPN topology – all sites are linked with a
single virtual
circuit to a central CE router. The routing is also extremely simple-static routing or a distance
vector protocol such as Routing Information Protocol (RIP) is more than adequate. If a dynamic
routing protocol such as RIP is used, split-horizon updates must be disabled at the hub router or
point-to-point subinterfaces must be used at the hub router to overcome the split-horizon problem.Cisco Press – Implementing Cisco MPLS
study guide p.4-36