The invention discloses an
Ethernet-tree realization method, an
Ethernet-tree realization
system, an
Ethernet-tree realization device and network equipment. The method comprises that: a first
provider edge (PE) transmits a reachable
route updating message carrying the node type of a first connected
customer edge (CE) to a second PE, wherein the node type comprises a leaf node and a root node; andwhen receiving the
route updating message, the second PE judges whether the first CE is the leaf node or the root node according to the node type carried in the
route updating message, traverses eachsecond CE connected with the second PE, and for each second CE, does not establish a
pseudo wire between the first and second CEs between the second PE and the first PE if the first and second CEs are both the leaf nodes, otherwise tries to establish the
pseudo wire between the first and second CEs between the second PE and the first PE. The node type is announced by the route updating message, and the leaf nodes are isolated so as to avoid the establishment of the
pseudo wire between the leaf nodes and simply and conveniently realize an Ethernet-tree.