The invention discloses a message transmission method and message
transmission equipment which are applied to
Ethernet virtual
interconnection (EVI) networking.
Generic routing encapsulation (GRE) tunnels are established among
peripheral equipment (PE) in an EVI embodiment; a broadcast mode of the EVI embodiment is No Flooding; the PE having a large-capacity
media access control (MAC) address table in the EVI embodiment is configured to be
Extranet PE; and expanded GRE tunnels are established between the
Extranet PE and common PE at the opposite ends of the GRE tunnels. The method comprises the following steps that: after the common PE receives a message from a local user side, if a corresponding output interface cannot be searched, the common PE encapsulates the message to be a GRE message and sends the GRE message to the
Extranet PE through the expanded GRE tunnels; the Extranet PE receives the GRE message and decapsulates the GRE message, searches an output interface corresponding to a target
MAC address of the message from the EVI embodiment to which the message belongs; if the output interface cannot be searched, the message is broadcasted at an interface of the local user side and is encapsulated to be the GRE message, and then the GRE message is sent back to the PE at the opposite ends through the expanded GRE tunnels to be forwarded. By the invention, the problem of flow loss caused by miss of the
MAC address under the condition that the EVI embodiment is configured to be a No Flooding mode.