A detailed introduction to the Link equalization Control tool in post-network era

As a network user, especially small and medium network users, you are not bothered by such problems and troubles: Routers can not solve the application layer link load balancing problem.

The software solution based on PC Architecture Linux is a bottleneck in itself! Due to lack of funds, can not buy truly dedicated to the application layer link load balancing hardware devices, and can only buy pc-based architecture Linux or Windows software solutions, although it can provide load balancing functions, but in traffic just reached the total bandwidth of 50%, The device itself has become a bottleneck in the chain due to the limitations of the architecture.

A variety of applications for bandwidth, leading to important applications when the intermittent response is extremely slow! Video, voice and other multimedia applications require guaranteed bandwidth and delay, transaction applications require a very short response time, FTP, BT, Donkey, web browsing and other transmission applications occupy more than 90% of the bandwidth and router processing capacity.

Network worms, backdoor, Trojans in the WAN bandwidth greatly increased, the internal network to bring great threat. Although the firewall is configured, but because the firewall is based on the network TCP/IP layer of filtering, the application layer of the attack does not have any blocking function.

Then there is no way to solve these difficult post-network ERA network application layer of common problems? The answer is yes.

Israel Radware is a listed company which focuses on the application layer link load balancing technology of RAD Group. Lookproof Branch is the Radware company dedicated to small and medium network users of the cost-effective overall WAN Multilink load balancing solution, its functionality covers the Multilink load balancing, Multilink bandwidth management and control, as well as Multilink network attack Prevention (IPS).

Multi-link load balancing and optimal link selection

As a pioneer of application layer link load balancing, Radware's linkproof Branch multilink application switch has all Radware link load balancing techniques: Linkproof Branch Multi-Link Application switch multi-link application switch mainly uses the following centralized method to deal with outflow flow.

--smartnat for intelligent address management of outflow flow, linkproof Branch Multilink application switch uses the algorithm called Smartnat. When a router (ISP) is selected to transfer out of traffic, the Linkproof Branch Multilink application switch selects the address provided by the ISP. If Linkproof chooses ISP1 as the path to flow out, it translates the internal host address into the IP address set by the ISP1 and serves as the source address for outgoing packets. Similarly, if Linkproof chooses ISP2 as the path to flow out, it translates the internal host address into another link's public IP address and serves as the source address for outgoing packets.

--content routing in order to optimize outflow flow, linkproof Branch Multilink Application switch also implements proximity operations for outgoing traffic. If an internal host wants to access an Internet site, the path to an ISP may be more efficient than the path through the other ISP. Therefore, the Linkproof Branch multi-link application switch can provide the nearest algorithm, choose the best ISP path for the traffic flowing to a certain site, improve the service quality.

Linkproof Branch Multi-link Application switch considers the hops of route, the delay of path and the load condition to calculate the proximity of each destination and select the best flow transmission path.

--Inflow load balancing linkproof Branch multi-link application switch not only needs to manage outflow traffic, it must also manage access from the Internet, that is, inflow (InBound) traffic. Suppose the Server1 in Figure II is a Web server, the Internet host name is www.radware.com and the address is private ip:192.168.1.100/24.

Combined with the integrated DNS proxies on the Smartnat and Linkproof Branch Multilink application switches, the load balancing of incoming traffic can be achieved.

Figure A linkproof Branch multi-link application Switch distribution map

Figure II Linkproof Branch Multi-link application The corresponding relationship between the URL and the internal host address on the switch

Add two NS records to the DNS server, as shown in figure one, pointing to Linkproof:

NS www.Radware.com 100.1.1.2

NS www.Radware.com 200.1.1.2

The corresponding relationship between the URL and the internal host address is set on the Linkproof Branch multi-link Application switch:

Www.radware.com 192.168.1.100

Instead, set static address translation on the Linkproof Branch Multilink application switch:

192.168.1.100 100.1.1.3

192.168.2.100 200.1.1.3

When an Internet user accesses www.radware.com, the DNS server responds to the user by Linkproof Branch Multilink application switch to complete the final address resolution. Linkproof Branch Multi-link application switch selects the appropriate ISP line according to the specific settings, and resolves the address to 100.1.1.3 If you select ISP1. Similarly, if you select ISP2, the address is resolved to 200.1.1.3. Thus the load balance of inflow flow is completed.

Proximity to the inflow of traffic, Linkproof Branch multilink application of the switch using the same as the flow of the proximity of the decision mechanism. Linkproof Branch Multi-link Application switch considers the hop number of the route, the delay of the path and the load condition to carry on the proximity operation to each point of access, select the best flow transmission path, and carry out the final resolution address.

The Linkproof Branch multi-link application switch meets the user's needs at a very attractive price. Linkproof Branch Multi-link application switches enable SMEs to control and optimize their Internet connections for the first time.

These functions completely make up for the traditional routers in the application layer and link load balance of the congenitally deficient, can be 100% of the 8 links fully utilized to get the largest link investment return and network user satisfaction!