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VRF route restriction management method of MPLS VPN network

A management method and routing technology, applied in the fields of routing table management and overrun management, can solve problems such as router crash, limited router memory space, and inability to configure routing on routers, so as to improve performance, prevent network attacks, and enhance security.

Inactive Publication Date: 2009-07-29
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0009] Due to the limited memory space of the router, it is usually necessary to connect multiple VPNs on a PE router to serve multiple different users. If a user CE pours too many routes into the PE router, the PE router will fail The memory resources are exhausted, so that the router cannot configure routes for other private networks, even public network routes, which will eventually cause the router to crash

Method used

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  • VRF route restriction management method of MPLS VPN network
  • VRF route restriction management method of MPLS VPN network
  • VRF route restriction management method of MPLS VPN network

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Embodiment Construction

[0027] The core idea of ​​the present invention is: set the maximum number of routing entries that the VRF can hold for each VRF, and count the injected routing entries, and compare this count with the maximum number set each time, if the VRF reaches the Routes are discarded when the maximum number is limited.

[0028] Realize the present invention, need to solve following several problems:

[0029] 1) How to configure the maximum number of routing entries for each VRF, and judge if the routing exceeds the limit.

[0030] 2) In the PE, usually each dynamic routing protocol module maintains a protocol routing table, and then delivers the learned dynamic routes to the routing management support module of the PE. For user-configured address routes, direct routes, and static routes, they are all configured by users and stored directly in the supporting routing table of the routing management support module, and are notified by the routing management support module to the dynamic ...

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Abstract

The invention discloses a VRF routing restriction and management method under a MPLS VPN network, which comprises the following steps: a maximum VRF routing item number is set; when a user wants to configure new routing, a routing management supporting module notifies a dynamic routing protocol module to judge whether a protocol routing table can contain the routing to be configured according to item number of the routing to be configured and the maximum VRF routing item number, if so, the user is notified to continue normal configuration, otherwise, the user configuration is forbidden; and when the dynamic routing protocol module learns new dynamic routing and wants to add the new dynamic routing into the protocol routing table, whether the protocol routing table can contain the routing to be added is judged according to item number of the routing to be added and the maximum VRF routing item number, if so, the dynamic routing is added into the protocol routing table and assigned to the routing management supporting module, otherwise, the dynamic routing is discarded. The VRF routing restriction and management method under the MPLS VPN network can improve the PE performance and the network security and prevent network attacking activities realized by large numbers of poured routings.

Description

technical field [0001] The present invention relates to routing table management technology in the field of data communication, in particular to a routing entry for VRF under MPLS (Multi-Protocol Label Switching, multi-protocol label switching protocol) VPN (Virtual Private Network, virtual private network) network Methods of overrun management. Background technique [0002] Virtual Private Network (Virtual Private Network), referred to as VPN, is a private private network built using a public network. With its unique advantages, it has won more and more applications. For users, using VPN can reduce the cost and facilitate management. For operators, the existing infrastructure can be used to provide value-added services, which can expand the business volume of operations and create new business opportunities. [0003] Multi-Protocol Label Switching (Multi-Protocol Label Switching, MPLS) is a classification and forwarding technology that classifies packets with the same for...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/46H04L45/50
Inventor 胡志锋
Owner ZTE CORP
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