Hi,

It means that the MAC layer couldn't successfully deliver the packet. You can 
find the reasons for this at the bottom of this page: 
http://masimum.inf.um.es/nsrt-howto/html/node23.html

Regards,
fran

P.S: answers to frequent questions like this can be easily found with 
http://www.isi.edu/nsnam/htdig/search.html

On Tuesday 19 September 2006 11:48, [EMAIL PROTECTED] wrote:
> Hi ns users,
> does anybody know what does it mean when a TCP packet is dropped and in the
> trace file is indicated as RTR CBK?
>
> Thanks a lot,
> Michele Nuti

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