I tried to squeeze in a few keywords in the subject in hope of an
answer to a nasty problem that I have. The setup is this:
ISDN adapter: Eicon Diva T/A (max. 230400 bps) capable of Stacker LZS
compression.
Protocol chosen in adapter profile: PPP async/sync, settings otherwise
normal like hardware handshake etc.
Serial card: TC-200 "Turbo Serial Card" jumped to 230400.
Compression: Hardware Stacker LZS (only compression my ISP supports)
Connect script: pppd connect 'chat -v "" ATDN104938833883' /dev/ttyS1 \
noccp crtscts modem defaultroute asyncmap 0 user mojo
The noccp option is needed to enable the hardware compression.
Problem: When I jump the serial card to 115200 everything works as it
is supposed to except of course that my maximum transfer rate gets
limited by that.
When I jump the serial card to 230400 the connection gets seriously
impaired - starts out at about 5 kbyte/sec for download of an ordinary
uncompressed large textfile and drops to 2 kbyte/sec after 5 seconds and
then it stalls completely. Strange thing, however, is that a very few times
it has worked, I then get 16-17 kb/sec on the large textfile which shows that
STAC is apparently working.
It works flawlessly in Windoze (sorry).
There is nothing as nasty as fluctuating problem, so I hope someone
might give me a clue to what settings I should investigate and possibly
change in order to get a predictable connection under Linux.
I have attached a debug output here.
Thanks in advance,
Morten
Aug 13 15:51:28 localhost pppd[307]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic
0x7483dbb5> <pcomp> <accomp>]
Aug 13 15:51:28 localhost pppd[307]: rcvd [LCP ConfReq id=0x1 <asyncmap 0xa0000>
<magic 0x8f04a865> <auth pap>]
Aug 13 15:51:28 localhost pppd[307]: sent [LCP ConfAck id=0x1 <asyncmap 0xa0000>
<magic 0x8f04a865> <auth pap>]
Aug 13 15:51:28 localhost pppd[307]: rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic
0x7483dbb5> <pcomp> <accomp>]
Aug 13 15:51:28 localhost pppd[307]: sent [PAP AuthReq id=0x1 user="mojo"
password="xxxxxxxxx"]
Aug 13 15:51:28 localhost pppd[307]: rcvd [PAP AuthAck id=0x1 "Login Succeeded"]
Aug 13 15:51:28 localhost pppd[307]: sent [IPCP ConfReq id=0x1 <addr 0.0.0.0>
<compress VJ 0f 01>]
Aug 13 15:51:28 localhost pppd[307]: rcvd [IPCP ConfReq id=0x1 <compress VJ 0f 00>
<addr 212.54.64.89>]
Aug 13 15:51:28 localhost pppd[307]: sent [IPCP ConfAck id=0x1 <compress VJ 0f 00>
<addr 212.54.64.89>]
Aug 13 15:51:29 localhost pppd[307]: rcvd [IPCP ConfNak id=0x1 <addr 212.54.68.111>]
Aug 13 15:51:29 localhost pppd[307]: sent [IPCP ConfReq id=0x2 <addr 212.54.68.111>
<compress VJ 0f 01>]
Aug 13 15:51:29 localhost pppd[307]: rcvd [IPCP ConfAck id=0x2 <addr 212.54.68.111>
<compress VJ 0f 01>]
Aug 13 15:51:48 localhost pppd[307]: sent [LCP TermReq id=0x2 "User request"]
Aug 13 15:51:48 localhost pppd[307]: rcvd [LCP TermAck id=0x2]
Aug 13 16:04:19 localhost pppd[341]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic
0x37f348d7> <pcomp> <accomp>]
Aug 13 16:04:22 localhost pppd[341]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic
0x37f348d7> <pcomp> <accomp>]
Aug 13 16:04:23 localhost pppd[341]: rcvd [LCP ConfReq id=0x1 <asyncmap 0xa0000>
<magic 0xaafa8b9> <auth pap>]
Aug 13 16:04:23 localhost pppd[341]: sent [LCP ConfAck id=0x1 <asyncmap 0xa0000>
<magic 0xaafa8b9> <auth pap>]
Aug 13 16:04:23 localhost pppd[341]: rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic
0x37f348d7> <pcomp> <accomp>]
Aug 13 16:04:23 localhost pppd[341]: sent [PAP AuthReq id=0x1 user="mojo"
password="52kk21py"]
Aug 13 16:04:23 localhost pppd[341]: rcvd [PAP AuthAck id=0x1 "Login Succeeded"]
Aug 13 16:04:23 localhost pppd[341]: sent [IPCP ConfReq id=0x1 <addr 0.0.0.0>
<compress VJ 0f 01>]
Aug 13 16:04:23 localhost pppd[341]: rcvd [IPCP ConfReq id=0x1 <compress VJ 0f 00>
<addr 212.54.64.77>]
Aug 13 16:04:23 localhost pppd[341]: sent [IPCP ConfAck id=0x1 <compress VJ 0f 00>
<addr 212.54.64.77>]
Aug 13 16:04:23 localhost pppd[341]: rcvd [IPCP ConfNak id=0x1 <addr 212.54.76.37>]
Aug 13 16:04:23 localhost pppd[341]: sent [IPCP ConfReq id=0x2 <addr 212.54.76.37>
<compress VJ 0f 01>]
Aug 13 16:04:23 localhost pppd[341]: rcvd [IPCP ConfAck id=0x2 <addr 212.54.76.37>
<compress VJ 0f 01>]
