Hey @EshaanAgg,
Good question! There’s a detailed explanation of this here: TCP: An Overview.
Relevant section:
In this case, the string [::1]:6379->[::1]:48586 is referring to the replication connection (the one your replica used to initiate the handshake).
The values of this connection are:
- Destination IP:
::1(localhost in IPV6) - Destination port number:
6379(master’s listening port that your replica connected to) - Source IP:
::1(localhost in IPV6) - Source port number:
48586(a random port used for the other end of this connection)