Re: [ns] Strangeness when using remove-all-packet-headers

[Felix Ko <felix.ko@mchp.siemens.de>]

Hi Brian!

I am running wireless simulations so I don't know if this
is of any help to you...

I've successfully removed all packetheaders, but I had
to add not only IP and AODV (my routingproto), but also
"LL Mac ARP RTP" because the simulations crashed otherwise
because these fields were accessed e.g. in the cmutrace-class.

Maybe this solves your problems...

Bye
Felix


Brian Lee Bowers wrote:

> I thought I would try out remove-all-packet-headers.  I used the
> command sequence shown on page 109 (section 12.1.2) of the ns Manual
>         remove-all-packet-headers
>         add-packet-header IP TCP
>
> I ran the simulation.  Running time and packet counts dropped
> dramatically (packet count went from 3222 unique packet IDs to 31
> unique packet IDs).  Additionally, 6 of the 7 TCP header flags were
> set in every packet when only IP and TCP were enabled - for
> comparison, 0 of 7 flags were set when I left all headers enabled.
> The trace file has the following in the flags field:
>         CP-AEFN
>
> Of the 288 lines in the trace file, all 288 have CP-AEFN.
>
> Am I missing something simple, or is it just a BAD idea to remove the
> excess headers?
>
> --
> Brian Lee Bowers        |       RADIANT Team
> bowersb@lanl.gov        |       Los Alamos National Laboratory