Despite the many issues that it can cause, that is an important feature of BGP. Since network connections can be asymmetrical, and outbound and inbound connections can have different requirements, the best (or most adequate) route from A to B might not be the best route from B to A.
Also, the route back to the source host doesn’t have to be same as the route out.
Despite the many issues that it can cause, that is an important feature of BGP. Since network connections can be asymmetrical, and outbound and inbound connections can have different requirements, the best (or most adequate) route from A to B might not be the best route from B to A.