The embodiment of the present application discloses a method for establishing a BGP session, sending an interface address and an alias, and a network device. In the method, the first node receives the first interface address and the first interface from the first inline interface of the second node. Address alias; the first node detects whether the second interface address alias of its second inline interface matches the first interface address alias; when the second interface address alias matches the first interface address alias, the first node according to address of the first interface, and establish a BGP session between the second inline interface and the first inline interface. In this case, you only need to configure the first interface address alias for the first inline interface, and configure the interface address alias that matches the first interface address alias for the second inline interface to establish a BGP session. Compared with the prior art, the configuration operation is effectively reduced, the establishment process of the BGP session is simplified, the time and manpower consumption are reduced, and the efficiency of the establishment of the BGP session is improved.