Extranet access method and system
An access system and access method technology, applied in the field of external network access systems, can solve the problems of cumbersome, complex weight setting, complex expansion of NAT device clusters, etc., and achieve the effect of cost saving and traffic balance
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Embodiment 1
[0090] In order to realize the external network access function provided by the embodiment of the present invention, this example specifically provides a specific processing manner. In this example, the focus is on the application of the OSPF protocol, which is the basis of the embodiment of the present invention. see image 3 , the application of the OSPF protocol includes two parts: the first part is to run the OSPF protocol on the network equipment coupled with the intranet, and the second part is to run the OSPF protocol on the NAT device.
[0091] The implementation means of running the OSPF protocol on the NAT device will now be described in detail. An optional means of implementation is:
[0092] Use the zebra and ospfd components in the open source tool quagga to support the OSPF protocol, where zebra is responsible for updating the local routing table, and ospfd is responsible for the implementation of the ospf protocol and communicates with other devices running os...
Embodiment 2
[0100] Now take three NAT devices (NAT device A, NAT device B, and NAT device C) as an example to provide external network access services, and use these three NAT devices to undertake three services (service 1, service 2, and service 3). The total traffic is 360, assuming that the predefined traffic distribution method is equal distribution. then in this example,
[0101] The weight set by service 1 is NAT device A->120, NAT device B->120, and NAT device C->120;
[0102] The weight set by service 2 is NAT device B->120, NAT device A->120, and NAT device C->120;
[0103] The weight set for service 3 is NAT device C->120, NAT device B->120, and NAT device A->120.
[0104] In this way, under normal working conditions, the traffic of the three services respectively falls on the three NAT devices on average. However, if another NAT device D is added, the weight setting of each service on the NAT device D becomes:
[0105] The weight set by service 1 is NAT device A->90, NAT de...
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