On Tue, 1 Apr 2008, Tyler Sutherland wrote:
Hi There,
I have a situation where I'm trying to maintain a PPP connection from my
Linux PC to an embedded Linux device.
I am able to get the PPP connection working such that each end has an IP
address and I can ping the other end for twenty seconds, but then I
receive an [LCP ConfReq] packet and the PPP connection sets itself up
What packet do you receive? And from where--- the embedded device?
Show us the output ( put debug into /etc/ppp/options, and
daemon.*;local2.* /var/log/daemonlog
into /etc/syslog.conf
and then do
killall -1 syslogd
again. This interrupts the IP connection and breaks my ability to ping.
I'm trying to figure out why this is happening, because I want to have a
stable PPP connection. If someone can help me I'd appreciate it very
much.
The embedded device seems to want to restart the connection every 20
seconds. This is what the pppd debug log looks like from my end:
~ # pppd nodetach file /etc/ppp/options.pppUSB1
pppd options in effect:
nodetach # (from command line)
debug # (from /etc/ppp/options.pppUSB1)
dump # (from /etc/ppp/options.pppUSB1)
This is there why?
noauth # (from /etc/ppp/options.pppUSB1)
/dev/ttyUSB1 # (from /etc/ppp/options.pppUSB1)
57600 # (from /etc/ppp/options.pppUSB1)
lock # (from /etc/ppp/options.pppUSB1)
noaccomp # (from /etc/ppp/options.pppUSB1)
asyncmap ffffffff # (from /etc/ppp/options.pppUSB1)
nopcomp # (from /etc/ppp/options.pppUSB1)
10.2.10.5:10.2.10.20 # (from /etc/ppp/options.pppUSB1)
nobsdcomp # (from /etc/ppp/options.pppUSB1)
nodeflate # (from /etc/ppp/options.pppUSB1)
using channel 18
????
Using interface ppp0
Connect: ppp0 <--> /dev/ttyUSB1
sent [LCP ConfReq id=0x1 <magic 0x913429f5>]
rcvd [LCP ConfAck id=0x1 <magic 0x913429f5>]
sent [LCP ConfReq id=0x1 <magic 0x913429f5>]
rcvd [LCP ConfAck id=0x1 <magic 0x913429f5>]
sent [LCP ConfReq id=0x1 <magic 0x913429f5>]
rcvd [LCP ConfAck id=0x1 <magic 0x913429f5>]
sent [LCP ConfReq id=0x1 <magic 0x913429f5>]
rcvd [LCP ConfAck id=0x1 <magic 0x913429f5>]
sent [LCP ConfReq id=0x1 <magic 0x913429f5>]
rcvd [LCP ConfAck id=0x1 <magic 0x913429f5>]
Those are all just refections. Ie you are talking to yourself.
rcvd [LCP ConfReq id=0x6c <asyncmap 0x0> <magic 0xa5a44a5a>]
sent [LCP ConfAck id=0x6c <asyncmap 0x0> <magic 0xa5a44a5a>]
They say asyncmap 0, why do you have asyncmap fffffff in your options?
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 10.2.10.5>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 10.2.10.5>]
rcvd [IPCP ConfAck id=0x1 <compress VJ 0f 01> <addr 10.2.10.5>]
rcvd [IPCP ConfReq id=0x6d <addr 10.2.10.20>]
sent [IPCP ConfAck id=0x6d <addr 10.2.10.20>]
local IP address 10.2.10.5
remote IP address 10.2.10.20
(there's 20 seconds here where I can ping the other side.)
rcvd [LCP ConfReq id=0x6e <asyncmap 0x0> <magic 0xa5a44a5a>]
Well, since they are demanding asyncmap 0 maybe they are upset that you
never said you were willing to have asyncmap 0. Remove that option from
your list of options, and replace with asyncmap 0
Connect time 0.3 minutes.
Sent 0 bytes, received 0 bytes.
sent [LCP ConfReq id=0x2 <magic 0x1cba1779>]
sent [LCP ConfAck id=0x6e <asyncmap 0x0> <magic 0xa5a44a5a>]
rcvd [LCP ConfAck id=0x2 <magic 0x1cba1779>]
sent [IPCP ConfReq id=0x2 <compress VJ 0f 01> <addr 10.2.10.5>]
sent [IPCP ConfReq id=0x2 <compress VJ 0f 01> <addr 10.2.10.5>]
rcvd [IPCP ConfAck id=0x2 <compress VJ 0f 01> <addr 10.2.10.5>]
rcvd [IPCP ConfReq id=0x6f <addr 10.2.10.20>]
sent [IPCP ConfAck id=0x6f <addr 10.2.10.20>]
local IP address 10.2.10.5
remote IP address 10.2.10.20
(there's 20 seconds here where I can ping the other side.)
rcvd [LCP ConfReq id=0x70 <asyncmap 0x0> <magic 0xa5a44a5a>]
Connect time 0.3 minutes.
Sent 0 bytes, received 0 bytes.
sent [LCP ConfReq id=0x3 <magic 0xf53f0cb6>]
sent [LCP ConfAck id=0x70 <asyncmap 0x0> <magic 0xa5a44a5a>]
rcvd [LCP ConfAck id=0x3 <magic 0xf53f0cb6>]
sent [IPCP ConfReq id=0x3 <compress VJ 0f 01> <addr 10.2.10.5>]
sent [IPCP ConfReq id=0x3 <compress VJ 0f 01> <addr 10.2.10.5>]
rcvd [IPCP ConfAck id=0x3 <compress VJ 0f 01> <addr 10.2.10.5>]
rcvd [IPCP ConfReq id=0x71 <addr 10.2.10.20>]
sent [IPCP ConfAck id=0x71 <addr 10.2.10.20>]
local IP address 10.2.10.5
remote IP address 10.2.10.20
(and it repeats to inifinity.)
Any ideas would be great.
Thanks,
Tyler
tsutherland@xxxxxxxx
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