PPP incoming connection only works about every second time

[gerritvn1945]

I have a direct cable connection to an embedded system and connect to
WinXP using PAP authentication at 19200 baud. The connection at the PPP
level works every time (I can trace that with Ethereal) but about every
second time the IP level does not work: an incoming Ping is not
answered and an outgoing Ping never goes out. Same for any other
service like FTP. It looks like there is no communication between the
PPP and the IP levels. I am using SP2 with Firewall disabled.

Anyone seen this before? Any solutions? Any way one can get an idea
what is wrong (like statistics or logs)?

 

[Benno]

I have a direct cable connection to an embedded system and connect to
WinXP using PAP authentication at 19200 baud. The connection at the PPP
level works every time (I can trace that with Ethereal) but about every
second time the IP level does not work: an incoming Ping is not
answered and an outgoing Ping never goes out. Same for any other
service like FTP. It looks like there is no communication between the
PPP and the IP levels. I am using SP2 with Firewall disabled.

From the command prompt
ipconfig /all
route print

output dureng good connection and during faulty connection.
Comare the results or post them here.

Benno

 

[gerritvn1945]

Output for both cases are exactly the same. Here they are anyway if
that can give you any clue:

ipconfig /all:
Windows IP Configuration

Host Name . . . . . . . . . . . . : gleb
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : Yes

PPP adapter RAS Server (Dial In) Interface:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Internal RAS Server
interface for dial in clients
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 10.1.1.1
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . :

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8139 Family PCI
Fast Ethernet NIC
Physical Address. . . . . . . . . : 00-C0-DF-10-EA-50
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.8
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.200
DNS Servers . . . . . . . . . . . : 196.25.1.1
196.43.3.206

route print:
==================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x10002 ...00 53 45 00 00 00 ...... WAN (PPP/SLIP) Interface
0x10003 ...00 c0 df 10 ea 50 ...... Realtek RTL8139 Family PCI Fast
Ethernet NIC - Deterministic Network Enhancer Miniport
===================================================================
===================================================================
Active Routes:
Network Destination Netmask Gateway Interface
Metric
0.0.0.0 0.0.0.0 192.168.0.200 192.168.0.8
20
10.1.1.1 255.255.255.255 127.0.0.1 127.0.0.1
50
10.1.1.2 255.255.255.255 10.1.1.1 10.1.1.1 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
192.168.0.0 255.255.255.0 192.168.0.8 192.168.0.8
20
192.168.0.8 255.255.255.255 127.0.0.1 127.0.0.1
20
192.168.0.255 255.255.255.255 192.168.0.8 192.168.0.8
20
224.0.0.0 240.0.0.0 192.168.0.8 192.168.0.8
20
255.255.255.255 255.255.255.255 192.168.0.8 192.168.0.8 1
Default Gateway: 192.168.0.200
===================================================================
Persistent Routes:
None

I had one wrong statement in my original message: ICMP echo requests do
go out on the serial link, but the response from the peer is ignored.
The problem seems that, in the faulty case, data is not passed from the
PPP to the IP layer.