Double Network card bandwidth Merge difficulty Big How to break through speed limit?

The slow speed of the network and the long time required to download the resource must have plagued every network administrator. Many corporate network administrators want to seek ways to improve speed. On the one hand, expand network exports on the other hand optimize the internal network structure. Many network administrators have hoped that some way to merge multiple network cards together, so that one or even more to improve the speed of network communication, the network speed doubled. However, in the actual use of the dual network card bandwidth is a difficult problem, on the one hand can not determine the communication data from which network card transmission, on the other hand also can not perfect binding two network cards.

One, dual access line bandwidth integration is not a small problem

Recently I also for this problem and headache, but finally I found a good way, today please IT168 Network Channel readers follow the author together through the Bielwei method to break the speed limit of dual network card.

The author of the enterprise has applied for two lines, one is Netcom ADSL line, bandwidth is 1M, the other is the line of telecommunications, bandwidth is 2M. Internal data packets are forwarded internally through a proxy server. Proxy Server has a dual network card; but has not found the perfect combination of bandwidth tools and means, usually netcom ADSL line as a backup line use, generally only through the telecommunications line access to the extranet.

The purpose of the author is to connect the two network cards on the proxy server to two external network export lines, and then merge them together to improve the overall speed of network communication. It is perfect to ask for a test to see the two-line download speed. The former Netcom ADSL line, bandwidth is 1M, the corresponding download speed is 130kb/s, the latter line of telecommunications, bandwidth is 2M, the corresponding download speed of 260kb/s; After merging the total bandwidth limit should be able to reach the 400kb/s.

Second, from the local route: realize dual network card bandwidth effective merging

There are a number of tools on the Internet to combine the use of multiple network cards, but the author has tried before the effect is not very good, because any software mergers are not smart enough, often resulting in two of network card transmission conflicts, thus counterproductive impact on the actual transmission speed. The method that I want to introduce today is to break through the network speed limit by the local route.

It is well known that we can think of him as a router for multiple NIC computers, and proxy servers use this routing data principle to work. A data entry called a routing table exists in the router that forwards the data through the information in the routing table. Can we forward data by setting the routing table when the computer has multiple network adapters? Send part of the data to the network card 1 while the other part of the data is forwarded to the Internet 2 transmission out? The answer is yes, we can add routing entries to the computer's operating system as we set the route.

In the Windows system we view the routing table through the route Print command, which is local, and adds a routing table entry through the route add command that deletes the route entry through route delete.

Now that we can add routing tables and entry information by command, how do we fill in the routing entries? In the route add command we need to know the forwarding network IP segment as well as the corresponding subnet mask, and also need to know the routing next hop address. The author takes the enterprise practical application as an example to introduce.

When there are more than one network card on the enterprise computer, we can view the address information of each network card through Ipconfig. For example, network card 1 is 192.168.1.120, network card 1 gateway is 192.168 1.1; network card 2 is 116.245.96.246, because it is PPPoE dial-up so Gateway is 116.245.96.246. (Figure 1)

Next we want to determine the data from which card to go by default, where the default data from the network card 2, then when we enter the command prompt window route print will be able to see the bottom of the default gateway, this is the default gateways, You can see from the diagram that the default gateway for the current system is the address 116.245.96.246 of network card 2, not the gateway 192.168.1.1 of network card 1. (Figure 2)