Generic HDLC layer
Krzysztof Halasa <khc@pm.waw.pl>
-January, 2003
Generic HDLC layer currently supports:
-- Frame Relay (ANSI, CCITT and no LMI), with ARP support (no InARP).
- Normal (routed) and Ethernet-bridged (Ethernet device emulation)
- interfaces can share a single PVC.
-- raw HDLC - either IP (IPv4) interface or Ethernet device emulation.
-- Cisco HDLC,
-- PPP (uses syncppp.c),
-- X.25 (uses X.25 routines).
-
-There are hardware drivers for the following cards:
-- C101 by Moxa Technologies Co., Ltd.
-- RISCom/N2 by SDL Communications Inc.
-- and others, some not in the official kernel.
+1. Frame Relay (ANSI, CCITT, Cisco and no LMI).
+ - Normal (routed) and Ethernet-bridged (Ethernet device emulation)
+ interfaces can share a single PVC.
+ - ARP support (no InARP support in the kernel - there is an
+ experimental InARP user-space daemon available on:
+ http://www.kernel.org/pub/linux/utils/net/hdlc/).
+2. raw HDLC - either IP (IPv4) interface or Ethernet device emulation.
+3. Cisco HDLC.
+4. PPP (uses syncppp.c).
+5. X.25 (uses X.25 routines).
+
+Generic HDLC is a protocol driver only - it needs a low-level driver
+for your particular hardware.
Ethernet device emulation (using HDLC or Frame-Relay PVC) is compatible
with IEEE 802.1Q (VLANs) and 802.1D (Ethernet bridging).
Make sure the hdlc.o and the hardware driver are loaded. It should
create a number of "hdlc" (hdlc0 etc) network devices, one for each
WAN port. You'll need the "sethdlc" utility, get it from:
- http://hq.pm.waw.pl/hdlc/
+ http://www.kernel.org/pub/linux/utils/net/hdlc/
Compile sethdlc.c utility:
gcc -O2 -Wall -o sethdlc sethdlc.c
* v35 | rs232 | x21 | t1 | e1 - sets physical interface for a given port
if the card has software-selectable interfaces
loopback - activate hardware loopback (for testing only)
-* clock ext - external clock (uses DTE RX and TX clock)
-* clock int - internal clock (provides clock signal on DCE clock output)
-* clock txint - TX internal, RX external (provides TX clock on DCE output)
-* clock txfromrx - TX clock derived from RX clock (TX clock on DCE output)
-* rate - sets clock rate in bps (not required for external clock or
- for txfromrx)
+* clock ext - both RX clock and TX clock external
+* clock int - both RX clock and TX clock internal
+* clock txint - RX clock external, TX clock internal
+* clock txfromrx - RX clock external, TX clock derived from RX clock
+* rate - sets clock rate in bps (for "int" or "txint" clock only)
+
Setting protocol:
* x25 - sets X.25 mode
* fr - Frame Relay mode
- lmi ansi / ccitt / none - LMI (link management) type
+ lmi ansi / ccitt / cisco / none - LMI (link management) type
dce - Frame Relay DCE (network) side LMI instead of default DTE (user).
It has nothing to do with clocks!
t391 - link integrity verification polling timer (in seconds) - user
-If you have a problem with N2 or C101 card, you can issue the "private"
-command to see port's packet descriptor rings (in kernel logs):
+If you have a problem with N2, C101 or PLX200SYN card, you can issue the
+"private" command to see port's packet descriptor rings (in kernel logs):
sethdlc hdlc0 private
-The hardware driver has to be build with CONFIG_HDLC_DEBUG_RINGS.
+The hardware driver has to be build with #define DEBUG_RINGS.
Attaching this info to bug reports would be helpful. Anyway, let me know
if you have problems using this.
-For patches and other info look at http://hq.pm.waw.pl/hdlc/
+For patches and other info look at:
+<http://www.kernel.org/pub/linux/utils/net/hdlc/>.
git://git.onelab.eu / linux-2.6.git / blobdiff