Method and device for correcting network topology

Abstract

The invention discloses a method and device for correcting network topology, relates to the field of information technology, and can improve the accuracy of network topology. The method includes: firstly determining the connection relationship between the three-layer interface and the subnet, then searching for the three-layer interface connected with the virtual private network routing and forwarding table VRF interface on the service provider border router PE, and connecting the VRF interface on the PE The routing identifier RD corresponding to the interface is added to the Layer 3 interface connected to the VRF interface on the PE, and then added according to the connection relationship between the Layer 3 interface and the subnet, and the Layer 3 interface connected to the VRF interface on the PE. RD, determine the subnet that needs to create a subnet copy, and create a subnet copy, and finally correct the network topology based on the connection relationship between the Layer 3 interface and the subnet, and the subnet copy. The invention is suitable for creating a copy of the subnet when a subnet is connected with multiple customer border routers, and correcting the network topology according to the created copy of the subnet.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a method and device for correcting network topology. Background technique [0002] Multi-Protocol Label Switching (English full name: Multi-Protocol Label Switching, English abbreviation: MPLS) is a system for fast data packet switching and routing. In the MPLS network topology, a user corresponds to a virtual private network (English full name: Virtual Private Network, English abbreviation: VPN), a VPN is divided into multiple subnets. [0003] At present, the network topology of MPLS is determined according to the corresponding relationship between each VPN and subnet. However, when the network topology is determined according to the corresponding relationship between VPNs and subnets, due to different There may be overlap between the VPNs corresponding to different customers, that is, the subnets divided in VPNs corresponding to different customers may overlap, resulting...

AI Technical Summary

Problems solved by technology

[0003] At present, the network topology of MPLS is determined according to the corresponding relationship between each VPN and subnet. However, when the network topology is determined according to the corresponding relationship between VPNs and subnets, due to different There may be overlap between the VPNs corresponding to different customers, that is, the subnets divided in VPNs corresponding to different customers may overlap, resulting in two different customer edge routers (English full name: Customer Edge router, English abbreviation: CE) connecting to the same subnet , which in turn leads to lower accuracy of the network topology, such as figure 1 As shown, two clients CE1 and CE2 are connected to the same subnet, and the corresponding address of this subnet is 192.168.1.0 / 24; CE3 and CE4 are connected to another subnet, and the corresponding address of this subnet is 192.168. 2.0 / 24, the two subnets are connected through multiple service provider edge routers (full English name: ProviderEdge router, English abbreviation: PE) to form an MPLS network topology, in which CE1 and CE2 do not belong to the same VPN, CE3 and CE4 not belong to the same VPN

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