Method and device for correcting network topology

Abstract

The invention discloses a method and device for correcting network topology and relates to the technical field of information. The method and the device can improve the accuracy of network topology. The method comprises the steps that firstly, the connecting relation between a three-layer interface and a subnet is determined; secondly, a three-layer interface connected with a virtual private network (VPN) routing forwarding table (VRF) interface on a service provider edge router (PE) is searched for, and a routing distinguisher (RD) corresponding to the VRF interface on the PE is added to the three-layer interface connected with the VRF interface on the PE, then the subnet with a subnet copy needing to the established is determined according to the connecting relation between the three-layer interface and the subnet and the RD added to the three-layer interface connected with the VRF interface on the PE, and the subnet copy is established; finally, the network topology is corrected according to the connecting relation between the three-layer interface and the subnet, and the subnet copy. The method and the device are suitable for correcting the network topology according to the created subnet copy when one subnet is communicated with multiple client edge routers and the subnet copy is created.

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 subnets divided in VPN corresponding to different customers may overlap, resulting in two different customer edge routers (English full nam...

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 subnets divided in VPN corresponding to different customers may overlap, resulting in two different customer edge routers (English full name: Customer Edgerouter, English abbreviation: CE) connected to the same subnet, This 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 (English full name: Provider Edge router, English abbreviation: PE) to form an MPLS network topology, in which CE1 and CE2 do not belong to the same VPN, and CE3 and CE2 do not belong to the same VPN. CE4 does not belong to the same VPN

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