| 摘要 |
A provider edge apparatus comprises an ingress processing unit to generate an encapsulated frame to be transmitted to another provider edge apparatus coupled to another customer edge apparatus, wherein the encapsulated frame includes a frame directed to the another customer edge apparatus, an egress processing unit to extract a frame to be forwarded to the specified customer edge apparatus, a storage to store an identifier of the provider edge apparatus and an identifier of the another provider edge apparatus when the specified customer edge apparatus is coupled to the another edge apparatus via a second access line, wherein the identifiers corresponds to a group identifier indicating an access line group belonging the first access line and the second access line, and a filter to discard the encapsulated frame or a frame in the encapsulated frame satisfying a filter condition. |
| 主权项 |
1. A provider network, comprising:
a plurality of provider edge apparatuses being coupled to a plurality of customer edge apparatuses via a plurality of access lines in order to forward a frame transmitted and received between the plurality of customer edge apparatuses, the plurality of provider edge apparatuses including two or more provider edge apparatuses coupled to a specified customer edge apparatus included in the plurality of customer edge apparatuses via two or more access lines different from each other, each of the two or more provider edge apparatuses, including: an ingress processing unit to generate a first encapsulated frame to be transmitted to another provider edge apparatus coupled to another customer edge apparatus, wherein the first encapsulated frame includes a frame received from the specified customer edge apparatus and directed to the another customer edge apparatus; an egress processing unit to extract a frame to be forwarded to the specified customer edge apparatus from a second encapsulated frame received from the another provider edge apparatus; a storage to store identifiers of the two or more provider edge apparatuses, wherein the identifiers correspond to a group identifier indicating an access line group to which the two or more access lines belong; and a filter to discard the first or the second encapsulated frame or a frame in the first or the second encapsulated frame satisfying a filter condition (1) or a filter condition (2), wherein the filter condition (1) is such that an identifier of a provider edge apparatus indicating a transmission source of the first or the second encapsulated frame is being stored in the storage, and the filter condition (2) is such that the first or the second encapsulated frame is a multicast frame received by each of the two or more provider edge apparatuses, and the provider edge apparatus itself does not correspond one of the two or more provider edge apparatuses performing an output processing of the multicast frame, and wherein each of the two or more provider edge apparatuses receives a group information frame including the group identifier and an identifier of a provider edge apparatus being a transmission source of the group information frame and stores, in the storage, the group identifier, the identifier of the provider edge apparatus of the transmission source and an identifier of the provider edge apparatus itself in association with each other. |
