This read-only integer reports the VPI value associated with a connection's endpoint entry in this particular endpoint table, providing the addressing identifier for that end of the connection. Admins use this together with endVci and ausmEndPortNum to fully identify a specific connection endpoint when reviewing the endpoint table. For example, an admin looking up a connection by its port, VPI, and VCI would use endVpi as one of the three key fields to locate the correct endpoint entry.