[Click] testbed setup using click

[Ashok Anand]

I see. so the environment is emulab,

the path is setup between, webserver to nodeA to nodeB to client
and for nodeA, click configuration looks like,

FromDevice(eth6)
      -> Strip(14)
      -> CheckIPHeader(0, CHECKSUM true, VERBOSE true)
      -> Print('Ok')
      -> IPPrint(LENGTH true)
      -> MyElementModify()
      -> CheckIPHeader(0, CHECKSUM true, VERBOSE true)
      -> Unstrip(14)
      -> Queue(10)
      -> ToDevice(eth8)

and nodeB looks like,

FromDevice(eth7)
      -> Strip(14)
      -> IPPrint(LENGTH true)
       -> MyElementUnModify()
      -> Unstrip(14)
      -> Queue(10)
      -> ToDevice(eth9)

these interfaces are correct interfaces in the path.



On Wed, Oct 6, 2010 at 4:19 AM, Beyers Cronje <bcronje at gmail.com> wrote:

> Hi,
>
> You can modify packet data in userlevel Click, so that is not the problem.
> Maybe post an example of how you are changing the packet.
>
> On Wed, Oct 6, 2010 at 9:59 AM, Ashok Anand <aa2jaiswal at gmail.com> wrote:
>
> > Hi,
> >
> > I am a new user to click.
> > I am trying to setup a simple testbed using click.
> > so there is a web server and a client, and there are two intermediate
> > nodes,
> > which runs click at userlevel.
> > First intermediate node, changes packet data, while second intermediate
> > undo
> > the changes.
> >
> > The problem that I am facing is that, the second intermediate node does
> not
> > find any changes in the packet.
> > Is it because, the click is running at userlevel, and modification at
> > userlevel, does not appear when sent to network..
> > (I am using simple configuration, which just reads packet from an
> > interface,
> > changes it, and then sends to another interface).
> >
> > Please let me know.
> >
> > Thanks,
> > Ashish
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> > click at amsterdam.lcs.mit.edu
> > https://amsterdam.lcs.mit.edu/mailman/listinfo/click
> >
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