linux/Documentation/networking/framerelay.txt
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   1Frame Relay (FR) support for linux is built into a two tiered system of device 
   2drivers.  The upper layer implements RFC1490 FR specification, and uses the
   3Data Link Connection Identifier (DLCI) as its hardware address.  Usually these
   4are assigned by your network supplier, they give you the number/numbers of
   5the Virtual Connections (VC) assigned to you.
   6
   7Each DLCI is a point-to-point link between your machine and a remote one.
   8As such, a separate device is needed to accommodate the routing.  Within the
   9net-tools archives is 'dlcicfg'.  This program will communicate with the
  10base "DLCI" device, and create new net devices named 'dlci00', 'dlci01'... 
  11The configuration script will ask you how many DLCIs you need, as well as
  12how many DLCIs you want to assign to each Frame Relay Access Device (FRAD).
  13
  14The DLCI uses a number of function calls to communicate with the FRAD, all
  15of which are stored in the FRAD's private data area.  assoc/deassoc, 
  16activate/deactivate and dlci_config.  The DLCI supplies a receive function
  17to the FRAD to accept incoming packets.
  18
  19With this initial offering, only 1 FRAD driver is available.  With many thanks
  20to Sangoma Technologies, David Mandelstam & Gene Kozin, the S502A, S502E & 
  21S508 are supported.  This driver is currently set up for only FR, but as 
  22Sangoma makes more firmware modules available, it can be updated to provide
  23them as well.
  24
  25Configuration of the FRAD makes use of another net-tools program, 'fradcfg'.
  26This program makes use of a configuration file (which dlcicfg can also read)
  27to specify the types of boards to be configured as FRADs, as well as perform
  28any board specific configuration.  The Sangoma module of fradcfg loads the
  29FR firmware into the card, sets the irq/port/memory information, and provides
  30an initial configuration.
  31
  32Additional FRAD device drivers can be added as hardware is available.
  33
  34At this time, the dlcicfg and fradcfg programs have not been incorporated into
  35the net-tools distribution.  They can be found at ftp.invlogic.com, in 
  36/pub/linux.  Note that with OS/2 FTPD, you end up in /pub by default, so just
  37use 'cd linux'.  v0.10 is for use on pre-2.0.3 and earlier, v0.15 is for 
  38pre-2.0.4 and later.
  39
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