  With the growing adoption of Distributed Ledger Technologies and the
subsequent scaling of these networks, there is an inherent need for efficient
and resilient communication used by the underlying consensus and replication
mechanisms. While resilient and efficient communication is one of the main
pillars of an efficient blockchain network as a whole, the Distributed Ledger
Technology is still relatively new and the task of scaling these networks has
come with its own challenges towards ensuring these goals. New content
distribution concepts like Information Centric Networking, of which Named Data
Networking is a worthy example, create new possibilities towards achieving this
goal, through in-network caching or built-in native multicasting, for example.
We present and evaluate XRP-NDN Overlay, a solution for increasing the
communication efficiency for consensus-validation based blockchains like the
XRP Ledger. We experiment by sending the XRP Ledger consensus messages over
different Named Data Networking communication models and prove that our chosen
model lowers the number of messages at node level to minimum necessary, while
maintaining or improving blockchain performance by leveraging the possibilities
offered by an overlay such as specific communication mechanisms.
