Setting Up the Loopback Interface A loopback interface should exist on every machine. The kernel configuration file contains many configuration commands that cover all aspects of the system configuration.
When a Solaris system boots, it detects all system hardware and uses dynamically loadable modules to support that hardware. By convention, BSD kernel configuration filenames use uppercase letters. While it is possible that a system that does not have Ethernet may not require this statement, it is usually configured and should remain in your kernel configuration.
Despite multiple network connections, the system is a host, not a router. Consult Wikipedia and the relevant RFCs if you want to know all the intricacies and options available. A collection of computers and other hardware components linked by physical cabling that permits any device on the network to interact with any other device.
For example, you open an ethernet packet to see the IP header and its data payload. From bottom the link to top the user applicationthese are the physical, data link, network, transport, and application layers.
In home routers, you generally will have a single public IP address that is assigned dynamically using DHCP Dynamic Host Configuration Protocol or assigned statically by a network service provider. A connector on a computer to which you can attach a serial line connected to peripherals which communicate using a serial bit-stream protocol.
You use ifconfig to tell the kernel about the interface, then add the routes to the remote machines on the network. Also if there is an update indicating a change in the network a router will send it immediately almost.
Sun designs its hardware to work with the Solaris kernel, and has a well-defined device driver interface so that third-party hardware vendors can design hardware that clearly identifies itself to the kernel. The first step is to make sure the networking software has been installed.
Static are individually defined often this will include a default route and dynamic is where a networking protocol is used to identify the most appropriate route for different connections.
Solaris depends on dynamically loadable modules. If there are multiple routes that match or multiple default gateways, then the matching interface with the lowest metric is chosen as the best route. This option is not needed by gated, which implements policy-based routing at the user level.
Our IP version 4 dates to After the route has been added to the kernel routing tables, you can try the Ethernet interface.
Transport Layer - This layer provides for the ability to perform error detection, error recovery, connection information, data sequencing, and the like. The listing shows other dependencies, including that vfat depends on fat and cdrom depends on ide-cd.
If the network is attached to your machine, you can test the connections immediately with the ping command. Next we look at how Unix kernels are recompiled.
As we saw in the previous section on dynamically loadable modules, network interfaces are usually controlled by loadable modules. Chapter 7, "Configuring Routing " describes how gated is used to run advanced routing protocols on Unix systems.
The IP address that is used with the route command to do this is that of the network as a whole, without the local identifier.
You also need to know the IP address assigned to your machine. For this reason, modprobe is a better command for manually loading modules. Routers work at the Network layer of the OSI model.
For example, to load the 3c device driver, enter insmod 3c On a Red Hat 7. Alternatively, you do not have to assign a domain at all for your machine, but can simply enter this short name: This is done with the ifconfig command. It provides all of the capabilities of the make config command but is much easier to use because it allows you to jump to specific areas of interest.
Whilst suitable for small to medium networks this does not transfer well to a large network, due to its inflexibility and its low hop count. The make command customizes the kernel configuration and generates the files including the Makefile needed to compile and link the kernel.
RIP routers periodically broadcast information about the routes they know. The arp command gives a better display of the cache. Produce a smaller, more efficient kernel by removing unneeded items Add a new device Modify a system parameter While there is rarely any need to modify the kernel network statements, it is useful to understand what these statements do.
If you have a full domain name assigned to your network and your machine, you can use that name for your system. By default, systems with one network interface are hosts that do not forward packets, and systems with more than one interface are routers that do forward packets.
Linux Kernel Configuration The source code for the Linux kernel is normally delivered with a Linux distribution.Linux grew up with a networking stack as part of its core, and networking is one of its strongest features.
Let's take a practical look at some of the TCP/IP fundamentals we use every day. Networking is so deeply embedded in Linux that its Unix domain sockets (also called inter-process communications, or IPC) behave like TCP/IP networking.
Unix domain sockets are endpoints between processes in your Linux operating system, and they operate only inside the Linux kernel. The TCP/IP model is based on a fi ve-layer model for networking. From bottom (the link) to top (the user application), these are the physical, data link, network, transport, and application layers.
Not all layers are completely defi ned by the model, so these layers are fi lled in by external standards and protocols. Networking Topologies and TCP/IP protocol Bus Topology Linux and Tcp/Ip Networking Report Essay Words | 5 Pages + Popular Essays.
The Effects of Westernization on the Ruling Class of South Africa; Physical and Cognitive Development; The Insider Analysis. History. TCP/IP is a set of network protocols which is best known for connecting the machines that make up the Internet.
However, it is generally assumed that the Internet started around and few people had heard of TCP/IP before then. By Emmett Dulaney. After you configure Ethernet and TCP/IP (whether during Linux installation or by running a network configuration tool or command later), you can use various networking applications on a Linux system without much problem.Download