[linux-dvb] Re: dvb and dvb0_0 network device

[Johannes Stezenbach <js@convergence.de>]

On Thu, Jun 10, 2004 at 09:30:36AM +0200, dvb@cristalys.com wrote:
> 
>   # dvbsnoop -n 1 101
> 
> ----------------------------------------------------------
> SECT-Packet: 00000001   PID: 101 (0x0065), Length: 80 (0x0050)
> Time received: Thu 2004-06-10  09:02:20.367
> ----------------------------------------------------------
>   0000:  3e b0 4d 7b f1 c1 00 00  20 5c d0 00 45 00 00 40   >.M{.... \..E..@
>   0010:  1d 54 00 00 ff 01 89 68  0a 01 00 fe 0a 01 00 01   .T.....h........
>   0020:  08 00 38 8c 03 d5 00 00  00 07 e5 59 00 00 70 fe   ..8........Y..p.
>   0030:  ab cd ab cd ab cd ab cd  ab cd ab cd ab cd ab cd   ................
>   0040:  ab cd ab cd ab cd ab cd  ab cd ab cd 7d 24 f5 0a   ............}$..


Looks good to me. If you still get the same output with
  # dvbsnoop -n 1 -crc 101
then the CRC is correct, otherwise you have found your problem.


> and the ifconfig gave me:
> 
> ----------------------------------------------------------------
> dvb0_0    Lien encap:Ethernet  HWaddr 00:D0:5C:20:F1:7B
>           inet adr:10.1.0.1  Bcast:10.255.255.255  Masque:255.0.0.0
>           UP BROADCAST RUNNING NOARP MULTICAST  MTU:4096  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 lg file transmission:1000
>           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

Either there was no traffic, or the CRC was wrong. (You should run
tcpdump after configuring the interface to set it into promiscous mode,
otherwise a wrong MAC address could also be the reason for not seeeing
any traffic).

Johannes