18c2ecf20Sopenharmony_ci.. SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ci================ 48c2ecf20Sopenharmony_ciFrame Relay (FR) 58c2ecf20Sopenharmony_ci================ 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ciFrame Relay (FR) support for linux is built into a two tiered system of device 88c2ecf20Sopenharmony_cidrivers. The upper layer implements RFC1490 FR specification, and uses the 98c2ecf20Sopenharmony_ciData Link Connection Identifier (DLCI) as its hardware address. Usually these 108c2ecf20Sopenharmony_ciare assigned by your network supplier, they give you the number/numbers of 118c2ecf20Sopenharmony_cithe Virtual Connections (VC) assigned to you. 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciEach DLCI is a point-to-point link between your machine and a remote one. 148c2ecf20Sopenharmony_ciAs such, a separate device is needed to accommodate the routing. Within the 158c2ecf20Sopenharmony_cinet-tools archives is 'dlcicfg'. This program will communicate with the 168c2ecf20Sopenharmony_cibase "DLCI" device, and create new net devices named 'dlci00', 'dlci01'... 178c2ecf20Sopenharmony_ciThe configuration script will ask you how many DLCIs you need, as well as 188c2ecf20Sopenharmony_cihow many DLCIs you want to assign to each Frame Relay Access Device (FRAD). 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ciThe DLCI uses a number of function calls to communicate with the FRAD, all 218c2ecf20Sopenharmony_ciof which are stored in the FRAD's private data area. assoc/deassoc, 228c2ecf20Sopenharmony_ciactivate/deactivate and dlci_config. The DLCI supplies a receive function 238c2ecf20Sopenharmony_cito the FRAD to accept incoming packets. 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ciWith this initial offering, only 1 FRAD driver is available. With many thanks 268c2ecf20Sopenharmony_cito Sangoma Technologies, David Mandelstam & Gene Kozin, the S502A, S502E & 278c2ecf20Sopenharmony_ciS508 are supported. This driver is currently set up for only FR, but as 288c2ecf20Sopenharmony_ciSangoma makes more firmware modules available, it can be updated to provide 298c2ecf20Sopenharmony_cithem as well. 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ciConfiguration of the FRAD makes use of another net-tools program, 'fradcfg'. 328c2ecf20Sopenharmony_ciThis program makes use of a configuration file (which dlcicfg can also read) 338c2ecf20Sopenharmony_cito specify the types of boards to be configured as FRADs, as well as perform 348c2ecf20Sopenharmony_ciany board specific configuration. The Sangoma module of fradcfg loads the 358c2ecf20Sopenharmony_ciFR firmware into the card, sets the irq/port/memory information, and provides 368c2ecf20Sopenharmony_cian initial configuration. 378c2ecf20Sopenharmony_ci 388c2ecf20Sopenharmony_ciAdditional FRAD device drivers can be added as hardware is available. 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ciAt this time, the dlcicfg and fradcfg programs have not been incorporated into 418c2ecf20Sopenharmony_cithe net-tools distribution. They can be found at ftp.invlogic.com, in 428c2ecf20Sopenharmony_ci/pub/linux. Note that with OS/2 FTPD, you end up in /pub by default, so just 438c2ecf20Sopenharmony_ciuse 'cd linux'. v0.10 is for use on pre-2.0.3 and earlier, v0.15 is for 448c2ecf20Sopenharmony_cipre-2.0.4 and later. 45