Setting up sync wan card - rx packet dropped

Hello All,
I installed a Cyclades PC300/TE2 synchronous router card according
its
manual. This is a 2 port card and i connected the two ports with a
cross cable.
The ports configuration parameters are here:

# This file was generated by PC300 Configuration Utility.
DEVICE=hdlc0
BOARD=pc300
MEDIA=e1
PROTO=ppp
CLOCK=int
LCODE=ami
FRAME=crc4
RX_SENS=sh
ACTIVE_CH=all
IPADDR=192.168.2.2
NETMASK=255.255.255.0
NETWORK=192.168.2.0
BROADCAST=192.168.2.255
POINTOPOINT=192.168.2.1
MTU=1500
ONBOOT=no

# This file was generated by PC300 Configuration Utility.
DEVICE=hdlc1
BOARD=pc300
MEDIA=e1
PROTO=ppp
CLOCK=ext
LCODE=ami
FRAME=crc4
RX_SENS=sh
ACTIVE_CH=all
IPADDR=192.168.2.1
NETMASK=255.255.255.0
NETWORK=192.168.2.0
BROADCAST=192.168.2.255
POINTOPOINT=192.168.2.2
MTU=1500
ONBOOT=no

I brought up the interfaces with the pc300up script of Cyclades which
produce the following commands:

/usr/local/sbin/pc300cfg hdlc0 lcode ami frame crc4 rx_sens sh
active_ch all
/usr/local/sbin/sethdlc hdlc0 e1 clock int
/usr/local/sbin/sethdlc hdlc0 ppp
ifconfig hdlc0 192.168.2.2 mtu 1500 netmask 255.255.255.0 pointopoint
192.168.2.1 up

and

/usr/local/sbin/pc300cfg hdlc1 lcode ami frame crc4 rx_sens sh
active_ch all
/usr/local/sbin/sethdlc hdlc1 e1 clock ext
/usr/local/sbin/sethdlc hdlc1 ppp
ifconfig hdlc1 192.168.2.1 mtu 1500 netmask 255.255.255.0 pointopoint
192.168.2.2 up

After that the ifconfig hdlcX output is the following:

hdlc0 Link encap:Point-to-Point Protocol
inet addr:192.168.2.2 P-t-P:192.168.2.1 Mask:255.255.255.0
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:1682 errors:0 dropped:1682 overruns:0 frame:0
TX packets:1794 errors:4 dropped:0 overruns:0 carrier:4
collisions:0 txqueuelen:10
Interrupt:11 Memory:da000000-da03ffff

hdlc1 Link encap:Point-to-Point Protocol
inet addr:192.168.2.1 P-t-P:192.168.2.2 Mask:255.255.255.0
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:1766 errors:37 dropped:1766 overruns:0 frame:37
TX packets:1682 errors:3 dropped:0 overruns:0 carrier:3
collisions:0 txqueuelen:10
Interrupt:11 Memory:da000000-da03ffff

My kernel version is 2.4.22, the patch from http://hq.pm.waw.pl/hdlc/
is applied to the kernel. When I use both of the cards in two
computers the rx packets are dropped as in this case. Could you help
me to figure out the cause of this problem ? Why are the all the rx
packets dropped ?
Thank you for your help:
Ferenc Sarkozy


Outputs of other tools:
++++++++++++++++++++++++++++++++++++++++++++++
sethdlc hdlc0
hdlc0: clock int rate 64000
protocol ppp

sethdlc hdlc1
hdlc1: clock ext
protocol ppp

++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++

pc300cfg hdlc0:
Interface: hdlc0
- Media: E1
- Line Code: AMI
- Frame Mode: CRC4
- RX Sensitivity: Short Haul
- Active channels: all
- Protocol: PPP
- Clock: master

pc300cfg hdlc1:
Interface: hdlc1
- Media: E1
- Line Code: AMI
- Frame Mode: CRC4
- RX Sensitivity: Short Haul
- Active channels: all
- Protocol: PPP
- Clock: slave

++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++

pc300util -s -d hdlc0:

PC300 - pc300util for kernel 2.4.x

---------------- PC300 - STATISTICS ----------------

hw type:TE line on:8 line off:5 multicast:0 collisions:0

rx : pack:2363 bytes:33082 errors:2 drops:2363 compressed:0
errors : length:0 overrun:0 crc:1 frame:1 fifo:0 missed:0

tx : pack:2483 bytes:53886 errors:9 drops:0 compressed:0
errors : abort:0 carrier:9 heartbeat:0 window:0

TE statistic
pden : 0 los : 1 losr : 1
lfa : 1 farec: 1 lmfa : 1
ais : 0 sec : 710 es : 2
rai : 0 bec : 0 fec : 0
cvc : 118 cec : 0 ebc : 1

Alarms : Red : OFF Blue : OFF
Yellow : OFF LFA : OFF
LMFA : OFF prbs : OFF

pc300util -s -d hdlc1:

PC300 - pc300util for kernel 2.4.x

---------------- PC300 - STATISTICS ----------------

hw type:TE line on:8 line off:5 multicast:0 collisions:0

rx : pack:2363 bytes:33082 errors:2 drops:2363 compressed:0
errors : length:0 overrun:0 crc:1 frame:1 fifo:0 missed:0

tx : pack:2483 bytes:53886 errors:9 drops:0 compressed:0
errors : abort:0 carrier:9 heartbeat:0 window:0

TE statistic
pden : 0 los : 1 losr : 1
lfa : 1 farec: 1 lmfa : 1
ais : 0 sec : 710 es : 2
rai : 0 bec : 0 fec : 0
cvc : 118 cec : 0 ebc : 1

Alarms : Red : OFF Blue : OFF
Yellow : OFF LFA : OFF
LMFA : OFF prbs : OFF

++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++

pc300util -S -d hdlc0:

PC300 - pc300util for kernel 2.4.x

------------------ PC300 - STATUS ------------------

Hardware Type: TE

TE Status: sync: ON
Red Alarm: OFF
Blue Alarm: OFF
Loss of Frame alignment: OFF
Yellow Alarm: OFF
Loss of Multi Frame alignment: OFF
Prbs: OFF

pc300util -S -d hdlc1:

PC300 - pc300util for kernel 2.4.x

------------------ PC300 - STATUS ------------------

Hardware Type: TE

TE Status: sync: ON
Red Alarm: OFF
Blue Alarm: OFF
Loss of Frame alignment: OFF
Yellow Alarm: OFF
Loss of Multi Frame alignment: OFF
Prbs: OFF
++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++
The pattern test seems to be OK.
++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++