Mastering Blockchain - Second Edition

Static nodes

If there is a need to connect to a specific set of peers, then these nodes can be added to a file where the chaindata and keystore files are saved.

For example, in the ~/etherprivate/ directory. The filename should be static-nodes.json. This is valuable in a private network because this way the nodes can be discovered on a private network. An example of the JSON file is shown as follows:

[ 
"enode:// 44352ede5b9e792e437c1c0431c1578ce3676a87e1f588434aff1299d30325c233c8d426fc5 [e-mail]:TCP_PORT" 
] 

Here, xxx is the public IP address and TCP_PORT can be any valid and available TCP port on the system. The long hex string is the node ID.