The Linux Loadable Kernel Module How-To

15.4. Network Device Drivers

15.4.1. bsd_comp: optional BSD compressor for PPP

Example:

   

modprobe bsd_comp

There are no module parameters.

This module depends on module ppp .

15.4.2. slhc: SLHC compressor for PPP

This module contains routines to compress and uncompress tcp packets (for transmission over low speed serial lines).

These routines are required by PPP (also ISDN-PP) and SLIP protocols, and are used by the LKMs that implement those protocols.

Example:

   

modprobe slhc

There are no module parameters.

15.4.3. dummy: Dummy network interface driver

This is said to be a bit-bucket device (i.e. traffic you send to this device is consigned into oblivion) with a configurable IP address. It is most commonly used in order to make your currently inactive SLIP address seem like a real address for local programs.

However, it also functions as a sort of loopback device. You configure it for a particular IP address and any packet you send to that IP address via this interface comes back and appears as a packet received by that interface for that IP address. This is especially handy for an IP address that would normally be reflected by another interface (a PPP interface, perhaps), but that interface is down right now.

You can have multiple dummy interfaces. They are named dummy0 , dummy1 , etc.

Example:

   

modprobe dummy

There are no module parameters.

15.4.4. eql: serial line load balancer

If you have two serial connections to some other computer (this usually requires two modems and two telephone lines) and you use PPP (a protocol for sending internet traffic over telephone lines) or SLIP (an older alternative to PPP) on them, you can make them behave like one double speed connection using this driver.

Example:

   

modprobe eql

There are no module parameters.

15.4.5. dlci: frame relay DLCI driver

This implements the frame relay protocol; frame relay is a fast low-cost way to connect to a remote internet access provider or to form a private wide area network. The one physical line from your box to the local "switch" (i.e. the entry point to the frame relay network) can carry several logical point-to-point connections to other computers connected to the frame relay network. To use frame relay, you need supporting hardware (FRAD) and certain programs from the net- tools package as explained in Documentation/networking/framerelay.txt in the Linux source tree.

Example:

   

modprobe dlci

There are no module parameters.

15.4.6. sdla: Sangoma S502A FRAD driver

This is a driver for the Sangoma S502A, S502E and S508 Frame Relay Access Devices. These are multi-protocol cards, but this driver can drive only frame relay right now. Please read Documentation/networking/framerelay.txt in the Linux source tree.

Example:

   

modprobe sdla

There are no module parameters.

This module depends on module dlci .

15.4.7. plip: PLIP network interface driver

PLIP (Parallel Line Internet Protocol) is used to create a mini network consisting of two (or, rarely, more) local machines. The parallel ports (the connectors virtually all ISA-descendant computers have that are normally used to attach printers) are connected using "null printer" or "Turbo Laplink" cables which can transmit 4 bits at a time or using special PLIP cables, to be used on bidirectional parallel ports only, which can transmit 8 bits at a time. The cables can be up to 15 meters long. This works also if one of the machines runs DOS/Windows and has some PLIP software installed, e.g. the Crynwr PLIP packet driver and winsock or NCSA's telnet .

See PLIP-Install-HOWTO .

Example:

   

modprobe plip

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