1 # SPDX-License-Identifier: GPL-2.0-only
3 # SLIP network device configuration
7 tristate "SLIP (serial line) support"
10 Say Y if you intend to use SLIP or CSLIP (compressed SLIP) to
11 connect to your Internet service provider or to connect to some
12 other local Unix box or if you want to configure your Linux box as a
13 Slip/CSlip server for other people to dial in. SLIP (Serial Line
14 Internet Protocol) is a protocol used to send Internet traffic over
15 serial connections such as telephone lines or null modem cables;
16 nowadays, the protocol PPP is more commonly used for this same
19 Normally, your access provider has to support SLIP in order for you
20 to be able to use it, but there is now a SLIP emulator called SLiRP
21 around (available from
22 <ftp://ibiblio.org/pub/Linux/system/network/serial/>) which
23 allows you to use SLIP over a regular dial up shell connection. If
24 you plan to use SLiRP, make sure to say Y to CSLIP, below. The
25 NET-3-HOWTO, available from
26 <http://www.tldp.org/docs.html#howto>, explains how to
27 configure SLIP. Note that you don't need this option if you just
28 want to run term (term is a program which gives you almost full
29 Internet connectivity if you have a regular dial up shell account on
30 some Internet connected Unix computer. Read
31 <http://www.bart.nl/~patrickr/term-howto/Term-HOWTO.html>). SLIP
32 support will enlarge your kernel by about 4 KB. If unsure, say N.
34 To compile this driver as a module, choose M here. The module
40 This option enables Van Jacobsen serial line header compression
45 config SLIP_COMPRESSED
46 bool "CSLIP compressed headers"
50 This protocol is faster than SLIP because it uses compression on the
51 TCP/IP headers (not on the data itself), but it has to be supported
52 on both ends. Ask your access provider if you are not sure and
53 answer Y, just in case. You will still be able to use plain SLIP. If
54 you plan to use SLiRP, the SLIP emulator (available from
55 <ftp://ibiblio.org/pub/Linux/system/network/serial/>) which
56 allows you to use SLIP over a regular dial up shell connection, you
57 definitely want to say Y here. The NET-3-HOWTO, available from
58 <http://www.tldp.org/docs.html#howto>, explains how to configure
59 CSLIP. This won't enlarge your kernel.
62 bool "Keepalive and linefill"
65 Adds additional capabilities to the SLIP driver to support the
66 RELCOM line fill and keepalive monitoring. Ideal on poor quality
69 config SLIP_MODE_SLIP6
70 bool "Six bit SLIP encapsulation"
73 Just occasionally you may need to run IP over hostile serial
74 networks that don't pass all control characters or are only seven
75 bit. Saying Y here adds an extra mode you can use with SLIP:
76 "slip6". In this mode, SLIP will only send normal ASCII symbols over
77 the serial device. Naturally, this has to be supported at the other
78 end of the link as well. It's good enough, for example, to run IP
79 over the async ports of a Camtec JNT Pad. If unsure, say N.