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diff --git a/Documentation/networking/framerelay.rst b/Documentation/networking/framerelay.rst new file mode 100644 index 000000000..6d904399e --- /dev/null +++ b/Documentation/networking/framerelay.rst @@ -0,0 +1,44 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================ +Frame Relay (FR) +================ + +Frame Relay (FR) support for linux is built into a two tiered system of device +drivers. The upper layer implements RFC1490 FR specification, and uses the +Data Link Connection Identifier (DLCI) as its hardware address. Usually these +are assigned by your network supplier, they give you the number/numbers of +the Virtual Connections (VC) assigned to you. + +Each DLCI is a point-to-point link between your machine and a remote one. +As such, a separate device is needed to accommodate the routing. Within the +net-tools archives is 'dlcicfg'. This program will communicate with the +base "DLCI" device, and create new net devices named 'dlci00', 'dlci01'... +The configuration script will ask you how many DLCIs you need, as well as +how many DLCIs you want to assign to each Frame Relay Access Device (FRAD). + +The DLCI uses a number of function calls to communicate with the FRAD, all +of which are stored in the FRAD's private data area. assoc/deassoc, +activate/deactivate and dlci_config. The DLCI supplies a receive function +to the FRAD to accept incoming packets. + +With this initial offering, only 1 FRAD driver is available. With many thanks +to Sangoma Technologies, David Mandelstam & Gene Kozin, the S502A, S502E & +S508 are supported. This driver is currently set up for only FR, but as +Sangoma makes more firmware modules available, it can be updated to provide +them as well. + +Configuration of the FRAD makes use of another net-tools program, 'fradcfg'. +This program makes use of a configuration file (which dlcicfg can also read) +to specify the types of boards to be configured as FRADs, as well as perform +any board specific configuration. The Sangoma module of fradcfg loads the +FR firmware into the card, sets the irq/port/memory information, and provides +an initial configuration. + +Additional FRAD device drivers can be added as hardware is available. + +At this time, the dlcicfg and fradcfg programs have not been incorporated into +the net-tools distribution. They can be found at ftp.invlogic.com, in +/pub/linux. Note that with OS/2 FTPD, you end up in /pub by default, so just +use 'cd linux'. v0.10 is for use on pre-2.0.3 and earlier, v0.15 is for +pre-2.0.4 and later. |