Method and device for realizing third tier forwarding and packaging protocol information in Internet

Abstract

The invention discloses a method and a device for realizing third tier forwarding and packaging protocol information in Internet. More than two first exchangers are in stacking connection; all second exchangers are in full connection with all the first exchangers; the first exchangers receive a data message with the need of carrying out third tier forwarding through a non-stackable port; an MAC (Media Access Control) address to be replaced, a next step-out port and a destination virtual port DVP value are obtained from third tier forwarding table items matched with the data message; the next step-out port is a port where the another first exchanger is connected with the second exchanger; the DVP value is obtained by mapping of a port, which is not connected with each first exchanger, of the corresponding exchanger; the MAC address in the data message is replaced by the MAC address to be replaced; a stacking protocol head carries the next step-out port and the DVP value; the data message which is packaged with the stacking protocol head and has the replaced MAC address is transferred to the other first exchanger by a stackable port.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and a device for realizing three-layer forwarding and encapsulating protocol information in a network. Background technique [0002] Network device virtualization is a trend, which can simplify management, reduce costs, and realize flexible networking. At present, many standardized protocols have been proposed to support the virtualization of network equipment, such as 802.1BR, 802.1Qbg, etc., by encapsulating the agreed protocol tag (TAG) in the data message, the control bridge (controlling bridge) in the networking model is realized. , CB) device and port extender (port extender, PE) device forward data packets according to a fixed channel, so as to achieve the effect of extending the CB port and virtualizing multiple physical devices together. [0003] In the standard protocol, only the Layer 2 forwarding process that the switch (the switch may be a CB device) ...

AI Technical Summary

Problems solved by technology

[0004] In order to realize Layer 3 forwarding of data packets and to encapsulate protocol information for data packets in the network, after receiving data packets that need to be forwarded at Layer 3, the switch needs to search for Layer 3 forwarding entries and pass Action to replace the destination MAC and source MAC to achieve three-layer forwarding, and then another action is required to label the packet encapsulation protocol. Since most switch chips currently only support one action, it cannot be used in the network under normal networking conditions. It not only realizes three-layer forwarding but also encapsulates protocol information

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