  Building on the adoption of the Network Functions Virtualization (NFV) and
Software Defined Networking (SDN) paradigms, 5G networks promise distinctive
features includ- ing the capability to support multi-tenancy. Virtual network
operators (VNOs) are expected to co-exist over the shared infrastructure,
realizing their network functionality on top of virtualized resources. In this
context, we observe the emerging opportunity for establishing synergies between
co-located tenants of the infrastructure, in the form of cache peering
relationships between co-located VNOs. Upon a cache miss, co-located caches
benefit from content cached at their peers, taking advantage of the shared
nature of the infrastructure in reducing latencies and traffic overheads. Our
approach allows VNOs to autonomously manage their peering links without the
involvement of the infrastructure operator.
