[ippd] Unsupported protocol ....

[Nuno Carvalho <nemanuel@student.dei.uc.pt>]

 Hi,

  I'm using an ISDN connection and everytime that i'm connected I stop
from receiving packets! So, to resolve it, I need to hangup ippp0 device
and restart again! :(

 On my syslog file there are the following lines that appears to be
something wrong but I don't know how to resolve it:


Sep 13 21:06:43 cavern ipppd[181]: Unsupported protocol 'Compression Control Protocol' (0x80fd) received
.
. (some others lines that i think )
.

Sep 13 21:06:43 cavern ipppd[181]: Unsupported protocol 'Bridging NCP' (0x8031) received


 Such lines appears at the begining of connection.

 Sometimes also appears the following line:

  Sep 13 21:36:34 cavern kernel: ISDN_CMD_ACCEPTB - not really needed


 The following lines appears sometimes:

Sep 15 13:27:14 cavern kernel: pcbit: invalid frame length -> TT=0450
Sep 15 13:27:14 cavern kernel: pcbit: layer 2 error


 What could be the reason ?

 Thanks.

 Best regards,
  Nuno Carvalho