Traffic forwarding method and devices

Abstract

The invention discloses a traffic forwarding method and devices. The method comprises the following steps of: connecting a plurality of forwarding devices between a WAN (wide area network) and a LAN (local area network) into a ring, taking one forwarding device on the ring as a root device, using one of two ring ports of the root device as a primary ring port while using the other as a secondary ring part; setting the secondary ring port in a state of forbidding service forwarding, setting an LAN port of one of the forwarding devices in the state of allowing the service forwarding, and setting the LAN ports of other forwarding devices in the state of forbidding the service forwarding; when traffic from the LAN reaches any forwarding device of the ring, mirroring the traffic to the other ring port by the forwarding device; meanwhile, judging whether the traffic can be forwarded to the WAN per se according to a predetermined traffic balancing algorithm or not; if so, forwarding the traffic to the WAN. The forwarding devices between the LAN and the WAN can be used for balancing the traffic in the invention.

Description

technical field [0001] The invention relates to the technical field of data transmission, in particular to a traffic forwarding method and forwarding equipment. Background technique [0002] For the convenience of understanding, an explanation of the following terms is first given: [0003] Network Address Translation (NAT, Network Address Translation): It belongs to the technology of accessing the Wide Area Network (WAN, Wide Area Network). It is a conversion technology that converts private (or reserved) addresses into legal IP addresses. It is widely used in various Types of Internet access methods and various types of networks. The reason is very simple, NAT technology not only perfectly solves the problem of insufficient Internet Protocol (IP, Internet Protocol) addresses, but also can effectively avoid attacks from outside the network, hide and protect computers inside the network. [0004] WAN: Also called Remote Computer Network (RCN, Remote Computer Network), it h...

AI Technical Summary

Problems solved by technology

[0007] With the rapid development of broadband networks, the bandwidth that people can use is increasing, and there are more and more types of access. This requires forwarding equipment (that is, commonly referred to as broadband routers or NAT equipment) to have high processing performance and reliability. High, this brings a problem: high-performance forwarding equipment is very expensive, low cost performance, and once the equipment fails, the entire network will fail, so a technology that stacks multiple equipment and balances traffic is needed to solve this problem. question

[0010] 1. Mutual backup cannot be realized

When a forwarding device fails, all workstations under the forwarding device cannot access the WAN normally, and cannot recover automatically

[0011] Second, the management is very cumbersome

Each forwarding device is independent and must be managed separately

[0012] 3. When the forwarding device enables DHCP to dynamically assign addresses, which forwarding device assigns the address has a priority. Whoever responds to the DHCP discovery (discover) message of the workstation first will be responsible for assigning the IP address, which will be very uncomfortable. Balanced, it is very likely that one of the forwarding devices undertakes the forwarding business of most workstations

[0013] 4. In the case of using a static IP address, the management is quite cumbersome, and it is easy to cause IP address conflicts, and few users use it

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