9/27/2023 0 Comments Muffin content switcher![]() ![]() This reduces the server load, the application complexity and your administration overhead. And because it’s your content switch the users are accessing now, you can take all this overhead away from your back-end servers and leave them to do what they do best - serve up data.įor example, if this is a secure connection, why make each server labour with the complexities of certificate management and SSL session decryption? Let the content switch handle the SSL termination and manage the client and server certificates for you. This is more, though, than just a virtual IP address - you can specify the ports served, the protocols accepted, the source(s) allowed and a whole heap of other parameters. On your content switch you can define a virtual server which the switch will then ‘offer’ to the outside world. This is one of the most basic things you can do with these devices. Let’s look at each of these aspects in more detail. A content switch can do all of this for you and much more: And, thirdly, you need it to be resilient so it doesn’t fall over the moment one of your servers goes off-line or something changes. Secondly you need some method of routing all those incoming sessions through to your server farm and sharing them evenly across your servers while still providing isolation between your internal network and the outside world. Firstly you need to somehow provide a single ‘target’ IP address for those users to aim at, as opposed to publishing all the addresses of all the individual servers. Obviously you have a few things to do here. Suppose you have a number of end-user PCs out on the internet that need to access an application running on a server farm in a data centre: So what can these devices do? We’ll consider that by looking at an example. The content switching application, running on top of the OS and interacting with the hardware, provides both in-depth control and powerful traffic processing facilities. ![]() In functional terms what you get here is a dedicated computer running a real OS (the BigIP LTMs run a variant of Linux) with added hardware to handle the packet manipulation and switching aspects. F5 Networks is another major contender with its BigIP LTM (Local Traffic Manager) and GTM (Global Traffic Manager) range of appliances. Cisco’s CSM (Content Switching Module) and ACE (Application Control Engine) module will slot into its 6500 Series switches and 7600 Series routers and Cisco provides standalone appliances such as the ACE 4710. Content switches, however, also inspect the contents of the data packet all the way from Layer 4 right up to Layer 7 and can be configured to do all sorts of clever things depending on what they find.Īn increasing number of vendors are offering these products. The devices we traditionally call switches work at Layer 2 of the OSI model and simply direct incoming frames to the appropriate exit port based on their destination MAC address. Content switches (also sometimes called application switches) is a class of network device that is becoming increasingly common in medium to large sized data centres and web-facing infrastructures.
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