A method and device for generating gre header encapsulation entries

Abstract

The invention discloses a method and equipment for generating GRE header encapsulation table items. The method comprises: a GRE tunnel receiving end receives a negotiation message from a GRE tunnel sending end, and the negotiation message carries the tunnel level and the GRE tunnel level of the GRE tunnel sending end. Header configuration information; the GRE tunnel receiving end uses the tunnel level and GRE header configuration information of the GRE tunnel sending end, the tunnel level of the GRE tunnel receiving end, and the GRE header configuration information to determine whether to generate a GRE header encapsulation entry whose destination is the GRE tunnel sending end; if Yes, then generate a GRE header encapsulation entry whose destination is the sending end of the GRE tunnel; if not, send a tunnel error message to the sending end of the GRE tunnel, and the tunnel error message is used to make the GRE tunnel send The terminal deletes the generated GRE header encapsulation entry whose destination is the receiving end of the GRE tunnel. In the embodiment of the present invention, it is possible to prevent the sending end of the GRE tunnel from sending a GRE message that cannot be decapsulated by the receiving end of the GRE tunnel, thereby reducing the waste of tunnel resources.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for generating GRE header encapsulation entries. Background technique [0002] GRE (Generic Routing Encapsulation, general routing encapsulation) protocol is used to encapsulate data packets of any network layer protocol (such as IPv6), so that these encapsulated data packets can be transmitted in another network (such as IPv4) . Wherein, the network layer protocol of the data message before encapsulation and the network layer protocol of the data message after encapsulation may be the same or different. Further, the transmission path of the encapsulated data message in the network is called a GRE tunnel, and the GRE tunnel is a virtual point-to-point connection, and the devices at both ends of the GRE tunnel respectively encapsulate and decapsulate the data message. [0003] Because there are devices of different manufacturers and models in the application network...

AI Technical Summary

Problems solved by technology

When the receiving end of the GRE tunnel uses its own GRE header configuration information to decapsulate the data packet, because the GRE header configuration information at the sending end of the GRE tunnel is different from the GRE header configuration information at the receiving end of the GRE tunnel, the receiving end of the GRE tunnel cannot decapsulate the packet. Data packets, resulting in data packet forwarding failure

Images