Ensuring reachability of referenced nodes shared within the network is critical.
Shows the number of node records in the routing tables of all nodes that our Nebula crawler visited, per crawl. Reachable counts the records of nodes that the crawler could reach, Unreachable the records of nodes that it could not reach (stale records). A node is reachable if the crawler could connect to it and get its routing table without an error. Note that nodes running behind a NAT are counted as unreachable even though they may be online. For instance, if a node’s record is present in the routing tables of 100 other nodes and the node is reachable, the plot will reflect an increase of 100 in the Reachable series.
Reachable vs Unreachable DHT Records Over Time