Method and apparatus for implementing composed virtual private network VPN

This disclosure provides a method and an apparatus for implementing a composed VPN. The method includes: obtaining a business type and a customer site that are input by a user; determining an access point corresponding to the customer site; determining one or more segment VPNs according to the business type and the access point corresponding to the customer site; obtaining a composed VPN according to the one or more segment VPNs; and outputting an access point list and a segment VPN list of the composed VPN to the user. In the solutions provided in this application, a user can learn a correlation between businesses in different domains related to a composed VPN, and can readily estimate a range affected by a business change of the composed VPN.