[Dibbler] FW: DHCPv6 issue
thomson at klub.com.pl
Sun Nov 12 20:47:29 CET 2006
On Sun, 12 Nov 2006 somebody known as nagarajan.balamukundan at wipro.com wrote:
> I'm facing a problem in using my DHCPv6 cilent. The client is
> running on VxWorks platform and I've setup a Dibbler server on a Win
> 2003 machine. It's solicit messages are recognized and it goes on to
> form the Advertisement. But the packet doesn't come out in the network.
> But the response may just start coming randomly. There is no certainty
> that on a given attempt I get back the advertisement. But if I do go on
> to receive advertisement, the complete message exchange including
> REQUEST, REPLY, goes on. Please can anyone suggest what is the solution.
There are several things that you should investigate.
1. Dibbler reports that is has received packets on the ToshibaLab (which
has interface index 4). However, your server config file instructs dibbler
to use "Local Area Connection" interface. (I think you just sent wrong
server config file).
2. I have no experience with Windows 2003. But in Windows XP the common
problem is an enabled firewall. Make sure that you have firewall disabled.
Take a look at Dibbler User's Guide, FAQ section.
3. You can try 0.5.0 version, but I believe there were no changes in the
Windows low-level sections.
4. Since you are developing your own client, you are have debugging
experience. If you are interested, you can run dibbler server in the
debugger and set a breakpoint in sock_send() in
5. If you still can't get dibbler working, I can compile a dibbler-server
with additional debugging messages just before executing sendto() Windows
API call, which actually sends packet.
6. After investigating the source code, I've found that dibbler might not
log low level error message to the log file, but just print it on the
console. So if you are running dibbler as a service, stop it, then run it
from command-line (start -> execute... -> cmd, then type cd c:\dibbler,
then dibbler-server run). It is possible that dibbler will print some
additional mesages on the console. Yes, that is ugly and needs to be
fixed. I'll improve that behavior as soon as I get some free time.
7. Dibbler is much more tested on Linux. If you don't care about server
platform, get any Linux distribution and install dibbler on it.
Of course the last advice should be threated as the last resort,
because it works around the problem and does not solve it.
Also note the you are using dibbler 0.4.1, which does not support prefix
delegation, therefore it complains about option 25. Latest CVS version
supports PD options. You can download it from CVS if you are interested in
> As can be seen above, the Server logs suggest that the Advertisement is
> being sent, but the corresponding packets cannot be captured on
> Ethereal, and so the client goes on retransmitting the solicit.
Hope that helps,
Tomasz Mrugalski, | "We all know Linux is great...it does |
thomson(at)klub(dot)com(dot)pl | infinite loops in 5 seconds." |
| Linus Torvalds |
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