L3VPN routing iteration outlet method

Abstract

The invention discloses an L3VPN routing iteration outlet method. The method is characterized in that an FIB of a forwarding plane can be layered and separated into a VC layer and an LSP layer respectively for iteration processing, and each layer is used to determine whether a next hop IP of current unicast routing and a direct-connected routing are in a same network segment; when the answer is yes, the forwarding information package processing can be carried out directly; otherwise, the next hop IP is used to execute a PEER command for the iteration, till the next hop IP and the direct-connected routing are in the same network segment, and then the forwarding information package processing can be carried out for the later searching of the routing tables and the searching of the PW or LSP labels. According to the invention, by layering and separating the FIB table of the forwarding plane, the routing, the PW, and the TUNNEL can be separated, and then when the main control data is changed, the independent data updating of the forwarding plane can be carried out, and the updating of a plurality of table item contents of the forwarding plane is not required during the updating of one data, and then the control of the business convergence time can be facilitated, when the network faults of the forwarding plane occurs.

Description

technical field [0001] The invention relates to a route iteration algorithm, in particular to a method for L3VPN route iteration egress. Background technique [0002] A virtual private network (Virtual Private Network; hereinafter referred to as: VPN) can interconnect outlets in different places through a public network to realize a private network that is used like a dedicated line connection. MPLSL3VPN refers to the VPN technology implemented using MPLS technology and used to transmit IP packets. Since IP works on the third layer of the 7-layer network model, it is called MPLSL3VPN. [0003] Traditional 3G / B3G networks only need the basic bearer network to provide Layer 2 capabilities to meet the needs of upper-layer network mobile service backhaul; but in LTE networks, due to the introduction of S1-Flex and X2 interfaces, the basic bearer network must have Layer 3 ability to exchange. [0004] Therefore, in the LTE network, if the L3VPN carries a large number of routes,...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem that the service convergence time of the LTE network cannot be controlled at the millisecond level when the service of the LTE network fails.

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