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When connecting to the Internet, you will want to use DNS. You must set up the loopback interface and configure the name resolver. To use SLIP or PPP, you have to configure some basic networking features as described in the previous chapters.
Ip over serial ppp how to#
In this chapter and the next, we'll discuss both protocols and how to configure them.
Ip over serial ppp drivers#
The drivers have both been around for some time and are stable and reliable. Linux supports kernel-based drivers for both SLIP and PPP. The PPP protocol adds a host of sophisticated features that contribute to its popularity today, and we'll look at the most important of these later. Today almost everyone uses the PPP protocol instead. The SLIP protocol is very simple to implement and at one time was the more common of the two. All that is required is a modem and a serial port equipped with a FIFO buffer. The hardware required to run SLIP or PPP is simple and readily available. The comparatively low cost of low-speed dialup modems and telephone circuits has made the serial line IP protocols immensely popular, especially for providing connectivity to end users of the Internet. The Ethernet protocol manages this mechanism in a LAN environment, and the SLIP and PPP protocols manage it for serial communications lines.
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The mechanism used to mark and detect the start and end of packets is called delimitation. Packet protocols like IP or IPX rely upon the receiver host knowing where the start and end of each packet are in the data stream. Linux Network Administrator's Guide, 2nd Edition Linux Network Administrator's Guide, 2nd Edition: Chapter 7: Serial Line IP