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A method and device for updating arp information entry

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: 2015-11-25
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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  • A method and device for updating arp information entry
  • A method and device for updating arp information entry
  • A method and device for updating arp information entry

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0019] Such as figure 2 As shown, it is a flow chart of the method for updating the ARP information entry proposed 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 message 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 two network devices to work in the bridge group cross-VLAN forwarding mode, and is connected in series between the network device and each server for Layer 2 bridge group forwarding. The two firewall lines A dual-machine hot backup relationship is formed between the cards, and the dual-machine hot backup technology can be further divided into active-standby mode and active-active mode. For ease of illustration, they are referred to as active firewall line cards and standby firewall line cards. Spec...

Embodiment 2

[0069] The technical solution proposed in the first embodiment above is: configure the monitoring VRRP gateway address on the current active firewall line card under the forwarding application of the Layer 2 bridge group. After the current active firewall line card fails, the current standby firewall line card Take over as the new active firewall line card, and act as a proxy VRRP gateway to send ARP request broadcast messages to all servers in the LAN that need to update MAC address information entries, so that the corresponding MAC address information entries of each server in the network can be updated in time , so as to ensure that the external network can actively and successfully access the servers in the LAN in a timely manner. Furthermore, Embodiment 2 of the present invention is here based on the above Embodiment 1, combining figure 1 The network architecture shown in , further elaborates on the technical solution proposed here in the embodiment of the present inventi...

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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, in particular to an address resolution protocol (ARP, Address Resolution Protocol) information table item update method and device. Background technique [0002] With the wide application of Transmission Control Protocol / Internet Protocol (TCP / IP, Transmission Control Protocol / Internet Protocol) network, the requirements for network reliability are getting higher and higher. Among them, integrating and embedding firewall line card modules in basic network devices such as routers and / or switches to achieve a high degree of integration of network and security protection has been more and more widely used. [0003] Among them, the reliability networking scheme using firewall line cards for server security protection in the LAN is as follows: figure 1 As shown, firstly, two network devices form a virtual routing device through Virtual Router Redundancy Protocol (VRRP, Virtua...

Claims

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Application Information

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