[Click] Click debugging

[Li, W David]

Hi Roman,

Yes, you are right. As soon as I put in MAC addresses it worked like a
charm. 

-David
 

-----Original Message-----
From: Roman Chertov [mailto:rchertov at purdue.edu] 
Sent: Thursday, August 23, 2007 11:38 AM
To: Li, W David
Cc: click at amsterdam.lcs.mit.edu
Subject: Re: [Click] Click debugging


The first thing is to look at the packet counters at 
ToDevice/FromDevice.  If your server has received packets 
(FromDevice/count > 0), then it is a problem in the Server config.

However, looking at your script I would say that probably your Client 
config is incorrect as it doesn't look like you specify the correct MAC 
addresses.  You don't supply src/dst MACs in EnsureEther so your frames 
do not get received by the server.  You can also do something like this.

              ->EnsureEther(0x0800, src_mac, dst_mac)
              -> t::Tee
              ->ToDevice(eth0)

t[1]->ToHostSniffers(ethX)  (where ethX is just some device on your 
system).   Then run ethereal and sniff on that device, and you can find 
out exactly what your are outputting on the link.

Roman


Li, W David wrote:
> Hi,
> 
>  
> 
> I am trying a simple ping application from one host to another host on
> the same LAN using the following scripts:
> 
>  
> 
>  
> 
> Client:
> 
>  
> 
> ICMPPingSource(x.y.z.a, x,y,z,b)
> 
>             ->IPPrint(ping-sent-from-crais)
> 
>             ->EnsureEther(0x0800)
> 
>             ->ToDevice(eth0)
> 
>  
> 
> Server:
> 
>  
> 
> FromDevice(eth0)
> 
>             ->Classifier(12/0800)
> 
>             ->Strip(14)
> 
>             ->CheckIPHeader
> 
>             ->IPFilter(allow icmp && icmp type echo)
> 
>             ->IPPrint(received:)
> 
>             ->Discard
> 
>  
> 
> However the server never got anything. How do I debug this? 
> 
>  
> 
> Thanks.
> 
>  
> 
> - David
> 
>  
> 
>  
> 
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