CONFIG_X25: CCITT X.25 Packet Layer

General informations

The Linux kernel configuration item CONFIG_X25 has multiple definitions:

CCITT X.25 Packet Layer found in net/x25/Kconfig

The configuration item CONFIG_X25:

• prompt: CCITT X.25 Packet Layer
• type: tristate
• depends on: (none)
• defined in net/x25/Kconfig
• found in Linux kernels: 3.9–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD
• modules built: x25, x25

Help text

X.25 is a set of standardized network protocols, similar in scope to frame relay; the one physical line from your box to the X.25 network entry point can carry several logical point-to-point connections (called "virtual circuits") to other computers connected to the X.25 network. Governments, banks, and other organizations tend to use it to connect to each other or to form Wide Area Networks (WANs). Many countries have public X.25 networks. X.25 consists of two protocols: the higher level Packet Layer Protocol (PLP) (say Y here if you want that) and the lower level data link layer protocol LAPB (say Y to "LAPB Data Link Driver" below if you want that).

Information about X.25 for Linux is contained in the files Documentation/networking/x25.rst and Documentation/networking/x25-iface.rst.

One connects to an X.25 network either with a dedicated network card using the X.21 protocol (not yet supported by Linux) or one can do X.25 over a standard telephone line using an ordinary modem (say Y to "X.25 async driver" below) or over Ethernet using an ordinary Ethernet card and the LAPB over Ethernet (say Y to "LAPB Data Link Driver" and "LAPB over Ethernet driver" below).

To compile this driver as a module, choose M here: the module will be called x25. If unsure, say N.

CCITT X.25 Packet Layer (EXPERIMENTAL) found in net/x25/Kconfig

The configuration item CONFIG_X25:

• prompt: CCITT X.25 Packet Layer (EXPERIMENTAL)
• type: tristate
• depends on: CONFIG_EXPERIMENTAL
• defined in net/x25/Kconfig
• found in Linux kernels: 2.6.13–2.6.39, 3.0–3.8
• modules built: x25, x25

Help text

X.25 is a set of standardized network protocols, similar in scope to frame relay; the one physical line from your box to the X.25 network entry point can carry several logical point-to-point connections (called "virtual circuits") to other computers connected to the X.25 network. Governments, banks, and other organizations tend to use it to connect to each other or to form Wide Area Networks (WANs). Many countries have public X.25 networks. X.25 consists of two protocols: the higher level Packet Layer Protocol (PLP) (say Y here if you want that) and the lower level data link layer protocol LAPB (say Y to "LAPB Data Link Driver" below if you want that).

You can read more about X.25 at http://www.sangoma.com/x25.htm and http://www.cisco.com/univercd/cc/td/doc/product/software/ios11/cbook/cx25.htm. Information about X.25 for Linux is contained in the files Documentation/networking/x25.txt and Documentation/networking/x25-iface.txt.

One connects to an X.25 network either with a dedicated network card using the X.21 protocol (not yet supported by Linux) or one can do X.25 over a standard telephone line using an ordinary modem (say Y to "X.25 async driver" below) or over Ethernet using an ordinary Ethernet card and the LAPB over Ethernet (say Y to "LAPB Data Link Driver" and "LAPB over Ethernet driver" below).

To compile this driver as a module, choose M here: the module will be called x25. If unsure, say N.

CCITT X.25 Packet Layer (EXPERIMENTAL) found in net/Kconfig

The configuration item CONFIG_X25:

• prompt: CCITT X.25 Packet Layer (EXPERIMENTAL)
• type: tristate
• depends on: CONFIG_EXPERIMENTAL
• defined in net/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.12
• modules built: x25, x25

Help text

X.25 is a set of standardized network protocols, similar in scope to frame relay; the one physical line from your box to the X.25 network entry point can carry several logical point-to-point connections (called "virtual circuits") to other computers connected to the X.25 network. Governments, banks, and other organizations tend to use it to connect to each other or to form Wide Area Networks (WANs). Many countries have public X.25 networks. X.25 consists of two protocols: the higher level Packet Layer Protocol (PLP) (say Y here if you want that) and the lower level data link layer protocol LAPB (say Y to "LAPB Data Link Driver" below if you want that).

You can read more about X.25 at http://www.sangoma.com/x25.htm and http://www.cisco.com/univercd/cc/td/doc/product/software/ios11/cbook/cx25.htm. Information about X.25 for Linux is contained in the files Documentation/networking/x25.txt and Documentation/networking/x25-iface.txt.

One connects to an X.25 network either with a dedicated network card using the X.21 protocol (not yet supported by Linux) or one can do X.25 over a standard telephone line using an ordinary modem (say Y to "X.25 async driver" below) or over Ethernet using an ordinary Ethernet card and the LAPB over Ethernet (say Y to "LAPB Data Link Driver" and "LAPB over Ethernet driver" below).

To compile this driver as a module, choose M here: the module will be called x25. If unsure, say N.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module x25 CONFIG_X25 : net/Kconfig : "CCITT X.25 Packet Layer (EXPERIMENTAL)" # in 2.5.45–2.5.75, 2.6.0–2.6.12
• lkddb module x25 CONFIG_X25 : net/x25/Kconfig : "CCITT X.25 Packet Layer" # in 2.6.13–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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