|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.