Oct 28, 2025

The solution is to configure outbound NICs for explicit binding (and/or default the explicit binding), and put each NIC on its own thread pool. This can be generalized to inbound and outbound. Each inbound address binding has an independent acceptor object that iterates over individual new connection attempts (basically the same for manual outbound connections - using the connector). Inbound connections are tied to an address, which means a NIC, so the number of acceptors is limited. Outbound connections also use a connector to establish the connection, and then the connector goes out of scope. The connector and acceptor objects control socket construction and thread pool ( asio iocontext) association, with each socket establishing and owning the asio strand instance for all operations on the connection.