[Click] Shaper problems

[Peter De Cleyn]

This script indeed works fine but without the SetTimestamp, the output from
IPPrint will show the time of creation of the shaped icmp packets,  giving
the impression packets are not shaped correctly.  Two consecutive packets
coming from the shaper will have timestamps that do not match the expected
0.5 sec difference.
When using the SetTimestamp after  the shaper, one will see that packets are
send out from the shaper in proper intervals.

Peter

On 3/2/06, Eddie Kohler <kohler at cs.ucla.edu> wrote:
>
> Hi Bart,
>
> What do you mean "shapes incorrectly"?  When I run the script with or
> without
> SetTimestamp it acts pretty much the same.
>
> Eddie
>
>
> Bart Braem wrote:
> > Hello,
> >
> > We have problems using the Shaper element. When executing the following
> script
> > in userlevel on Click 1.4.3 and Click CVS the Shaper clearly shapes
> > incorrectly.
> >
> > ICMPPingSource(1.2.3.4, 2.3.4.5, INTERVAL 0.01)
> > //    -> SetTimestamp
> >       -> IPPrint("before shaper")
> >       -> Queue
> >       -> Shaper(2)
> >       -> Unqueue
> > //    -> SetTimestamp
> >       -> IPPrint("after shaper")
> >       -> Discard;
> >
> > When unquoting SetTimestamp things seem to work correctly. Of course I
> wonder
> > why. Shaper does not reference the timestamp annotation so I do not
> > understand this effect...
> >
> > Bart
> >
> >
> > ------------------------------------------------------------------------
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