A method for establishing a traffic engineering label switched path, TE LSP, wherein the method comprises: receiving, by an egress node, a resource reservation protocol-traffic engineering, RSVP-TE, based Path message sent by an ingress node according to an explicit route object, wherein the Path message comprises information of a tenant and a service of a to-be-established TE LSP and identification information of the TE LSP, wherein the tenant is a user who leases a network resource, the service is a video or Voice over Internet Protocol application borne on a network, and the information of the tenant and the service of a to-be-established TE LSP is a type-length-value, TLV, of the tenant and the service, wherein TLV encoding is used for indicating a type of transmitted information, a length of to-be-transmitted information and a value of transmitted actual information; determining, by the egress node, whether the identification information of the TE LSP and the information of the tenant and the service corresponding to the TE LSP are stored; and if it is determined that the identification information of the TE LSP and the information of the tenant and the service corresponding to the TE LSP are not stored, storing, by the egress node, a correspondence between the identification information of the TE LSP and the information of the tenant and the service, and sending an RSVP-TE-based resource reservation, Resv, message to the ingress node, so as to establish the TE LSP from the ingress node to the egress node, wherein the TE LSP is a dedicated TE LSP for the tenant and the service and the Resv message comprises the information of the tenant and the service; if it is determined that the identification information of the TE LSP and the information of the tenant and the service corresponding to the TE LSP are stored, determining, by the egress node, whether the information of the tenant and the service matches locally stored information of a tenant and a service corresponding to the identification information of the TE LSP; and if it is determined that the information of the tenant and the service matches the locally stored information of a tenant and a service corresponding to the identification information of the TE LSP, sending, by the egress node, the Resv message to the ingress node, and wherein isolation between tenants and services is implemented on the egress node according to locally stored correspondence between a TE LSP and owner-related information of the TE LSP., the owner-related information comprises at least one of a tenant information and a service information. receiving, by an egress node, a resource reservation protocol-traffic engineering, RSVP-TE, based Path message sent by an ingress node according to an explicit route object, wherein the Path message comprises information of a tenant and a service of a to-be-established TE LSP and identification information of the TE LSP, wherein the tenant is a user who leases a network resource, the service is a video or Voice over Internet Protocol application borne on a network, and the information of the tenant and the service of a to-be-established TE LSP is a type-length-value, TLV, of the tenant and the service, wherein TLV encoding is used for indicating a type of transmitted information, a length of to-be-transmitted information and a value of transmitted actual information; determining, by the egress node, whether the identification information of the TE LSP and the information of the tenant and the service corresponding to the TE LSP are stored; and if it is determined that the identification information of the TE LSP and the information of the tenant and the service corresponding to the TE LSP are not stored, storing, by the egress node, a correspondence between the identification information of the TE LSP and the information of the tenant and the service, and sending an RSVP-TE-based resource reservation, Resv, message to the ingress node, so as to establish the TE LSP from the ingress node to the egress node, wherein the TE LSP is a dedicated TE LSP for the tenant and the service and the Resv message comprises the information of the tenant and the service; if it is determined that the identification information of the TE LSP and the information of the tenant and the service corresponding to the TE LSP are stored, determining, by the egress node, whether the information of the tenant and the service matches locally stored information of a tenant and a service corresponding to the identification information of the TE LSP; and if it is determined that the information of the tenant and the service matches the locally stored information of a tenant and a service corresponding to the identification information of the TE LSP, sending, by the egress node, the Resv message to the ingress node, and wherein isolation between tenants and services is implemented on the egress node according to locally stored correspondence between a TE LSP and owner-related information of the TE LSP., the owner-related information comprises at least one of a tenant information and a service information.