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Method and device for updating ARP (Address Resolution Protocol) information table

An update method and information table technology, applied in data exchange through path configuration, digital transmission system, electrical components, etc., can solve the problems that the external network cannot actively and successfully access the local area network sub-server, and the access success rate is low

Active Publication Date: 2013-01-30
BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, because the network device where the new active firewall line card is located may have the original MAC address information table of the server, it will cause the problem that the external network cannot actively and successfully access some servers in the LAN
[0007] To sum up, when the firewall line card has a hot standby switch, when the external network accesses the server in the LAN, the access success rate is low

Method used

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  • Method and device for updating ARP (Address Resolution Protocol) information table
  • Method and device for updating ARP (Address Resolution Protocol) information table
  • Method and device for updating ARP (Address Resolution Protocol) information table

Examples

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Embodiment 1

[0019] like figure 2 As shown, it is a flowchart of the proposed method for updating ARP information entries in Embodiment 1 of the present invention, and the specific processing process is as follows:

[0020] Step 21, when the current active firewall line card is in a normal working state, it monitors the ARP information packets sent by the VRRP gateway.

[0021] Among them, based on figure 1 In the networking scheme shown, an integrated firewall line card is embedded in the two network devices respectively to work in the bridge group cross-VLAN forwarding mode, and connected in series between the network device and each server for Layer 2 bridge group forwarding. A dual-system hot-standby relationship is formed between cards, and the dual-system hot-standby technology can be divided into active-standby mode and active-active mode. For ease of explanation, they are referred to as the active firewall line card and the standby firewall line card. Specifically, the active-s...

Embodiment 2

[0069] The technical solution proposed in the above-mentioned first embodiment is: configure the monitoring VRRP gateway address on the current active firewall line card under the Layer 2 bridge group forwarding application, and after the current active firewall line card fails, the current standby firewall line card It takes over as the new active firewall line card, and acts as a proxy VRRP gateway to send ARP request broadcast messages to each server in the LAN that needs to update the MAC address information entry, so that the MAC address information entry corresponding to each server in the network can be updated in time , so as to ensure that the external network can actively and successfully access each server in the local area network in time. Further, the second embodiment of the present invention is based on the above-mentioned first embodiment, combined with figure 1 The network architecture shown in , further elaborates the technical solutions proposed here in the ...

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Abstract

The invention discloses a method and a device for updating an ARP (Address Resolution Protocol) information table; the method comprises the steps of monitoring an ARP information message sent by a virtual router redundancy protocol (VRRP) gateway and synchronizing the message to the existing standby firewall line card when the existing main firewall line card is in a normal working state; switching the existing standby firewall line card into a new main firewall line card when the existing main firewall line card is judged to be in an abnormal working state; sending an address resolution protocol (ARP) request broadcast message to at least one server in a local area network; and updating media access control (MAC) address information table according to the received ARP information message after receiving the ARP response single-broadcast message responded by the server. With the adoption of the technical sachem, the access success rate is improved when an external network accesses the server in the local area network after the firewall line card carries out hot standby switch.

Description

technical field [0001] The invention relates to the technical field of networking of a layer-2 firewall, and in particular, to a method and device for updating an address resolution protocol (ARP, Address Resolution Protocol) information table item. Background technique [0002] With the wide application of Transmission Control Protocol / Internet Protocol (TCP / IP, Transmission Control Protocol / Internet Protocol) networks, the requirements for network reliability are getting higher and higher. Among them, the firewall line card module is integrated and embedded in basic network equipment such as routers and / or switches to achieve a high degree of integration of network and security protection, and has been widely used. [0003] Among them, the reliability networking scheme of using firewall line cards for the security protection of servers in the local area network is as follows: figure 1 As shown, first, two network devices form a virtual routing device through the Virtual R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/761H04L12/713H04L29/06H04L29/12H04L12/46H04L45/16H04L45/586
Inventor 陈佑建
Owner BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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