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Method and system for protecting unidirectional link detection (UDLD)

A unidirectional link and message technology, which is applied in the field of data communication to save hardware costs and improve security.

Active Publication Date: 2012-01-25
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem solved by the present invention is to provide a method and system for unidirectional link detection and protection, so as to solve the problem of DoS attack on UDLD on the network, and improve the security of the network and the robustness of the protocol

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  • Method and system for protecting unidirectional link detection (UDLD)
  • Method and system for protecting unidirectional link detection (UDLD)
  • Method and system for protecting unidirectional link detection (UDLD)

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Embodiment Construction

[0037]In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] Such as figure 1 As shown, it is a flow chart of a method for unidirectional link detection UDLD protection of the present invention, and a method for unidirectional link detection UDLD protection is provided to deal with DoS attacks, including,

[0039] Step S101, the physical interface of the local network device and the physical interface of the opposite end network device are physically connected through an optical fiber; the physical interface of the local network device and the physical interface of the opposite end network device are respec...

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Abstract

The invention relates to a method for protecting unidirectional link detection (UDLD). The method is used for dealing with deny-of-service (DoS) attack, and comprises: a UDLD interface of network equipment receives UDLD messages in an amount greater than a specific number during the first time; the UDLD messages are written into an access control list (ACL) item and then are filtered; and the UDLD messages are not received during the second time. The invention also relates to a system for protecting UDLD. The technical scheme of the invention supports the function of preventing the DoS attack, so the safety problem of performing the DoS attack on the UDLD on the internet is solved; and the aim of the function of preventing the DoS attack is realized by virtue of software, so the hardware cost added for preventing the DoS attack is saved.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a method and system for unidirectional link detection and protection. Background technique [0002] Today, when Ethernet technology is widely used, the network has higher and higher requirements for the reliability of Ethernet. Various technologies to ensure the normal operation of the Ethernet network have been born one after another, and UDLD (Unidirection Link Detection, Unidirectional Link Detection) is also one of them. a kind of agreement. [0003] UDLD is a Layer 2 protocol that works on top of LLC (Logical Link Control) and is used to detect the occurrence of single-pass faults on Ethernet links and avoid loopbacks and loopbacks caused by single-pass Ethernet links. The emergence of problems such as routing black holes. UDLD detects whether there is a single-communication problem on the Ethernet interface by establishing neighbors and checking the Layer 2 logical inter...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L29/06
Inventor 李绪文
Owner ZTE CORP