Network access server accessing method and network access server

A technology for accessing servers and networks, which is applied in the field of methods and LNS, accessing network access servers, and can solve problems such as CPU and memory resource occupation, process failure, and L2TP connection failure to establish successfully, so as to avoid long-term The effect of time waiting

Active Publication Date: 2011-07-20
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the resources on the LNS are not enough, the L2TP connection cannot be successfully established, causing the user to wait too long
In addition, if many users need to estab

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  • Network access server accessing method and network access server
  • Network access server accessing method and network access server
  • Network access server accessing method and network access server

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] The method provided by the present invention mainly includes: after the LNS receives the SCCRQ from the LAC, check whether the current resource usage status of the LNS meets the preset L2TP access condition, if so, start the L2TP process to carry out the L2TP connection negotiation; otherwise, send the LNS to the LAC Sending an L2TP connection failure message instructs the LAC to send an L2TP connection establishment request to other LNSs.

[0021] The above method can be applied to an L2TP VPN including a LAC and more than two LNSs connected to the LAC, and the remote device can establish an L2TP connection with one of the LNSs through the LAC. Assume that one of the LNSs is the active LNS, and the other LNSs are the backup LNSs. figure ...

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Abstract

The invention provides a layer 2 tunnel protocol (L2TP) network server (LNS) accessing method and an LNS. The method comprises that: after receiving a L2TP connection establishment request from an L2TP access concentrator (LAC), the LNS checks whether the current resource service conditions of the LNS meet preset L2TP access conditions or not, starts an L2TP progress for L2TP connection negotiation if the current resource service conditions of the LNS meet the preset L2TP access conditions, otherwise, transmits an L2TP connection failure message to the LAC to indicate the LAC to transmit the L2TP connection establishment request to another LNS. By the method and the LNS, a user can be prevented from waiting for an excessively long time in an LNS accessing process, and the normal running of other important service progresses is ensured as much as possible.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for accessing a network access server (LNS) and the LNS. Background technique [0002] The remote access virtual private network (Access VPN) provides a private network connection between the public network and the enterprise internal network (Intranet) for mobile employees on business trips, telecommuters and remote small offices. [0003] Layer 2 Tunneling Protocol Virtual Private Network (L2TP VPN) is a type of Access VPN. L2TP is used to build a virtual private network. Its typical networking is as follows: figure 1 As shown, it mainly includes: a remote device, an L2TP access concentrator (LAC) and a network server (LNS). Wherein, the remote device is a remote user device or a branch structure to be connected to the intranet network, and is usually a user host or a routing device of a private branch network. LAC is a device with point-to-point (PPP) ...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/46H04L29/06
Inventor 高凯
Owner NEW H3C TECH CO LTD
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