Discussion:
Windows not responding to echo requests from my PPP Stack
(too old to reply)
Chris
2006-04-06 18:29:13 UTC
Permalink
I am in the process of testing a PPP Stack that I developed. Everything
is pretty much working (I am currently testing with the PPP stack that
comes with Windows XP).

In this scenario, I have put in a periodic timer that fires to make
sure that the PPP connection is still healthy.

My test scenario is to run a constant ping, and then watch that LCP
echo requests go out periodically among the ping requests/replies. What
I am seeing is that the Pings are working great (as well as TCP/UDP
Traffic). I see my periodic LCP Echo requests going out, but windows
appears to be ignoring them (No reply).

Here is the echo packet I am sending captured off the link (Snarfed
using Ethereal)

09 00 00 1c ef be ad e2 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70


Is this correct, From what I can tell it is. Do I have to do anything
special with the Windows PPP Client to get it to echo-reply.

Thanks

-Chris
Chris
2006-04-06 19:10:55 UTC
Permalink
Figured it out !

My size was incorrect in my Echo packet and Windows silently discarded
it



-Chris

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