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-   -   RCP implementation over ns2.30, Getting error on executing ns command. (https://www.linuxquestions.org/questions/linux-networking-3/rcp-implementation-over-ns2-30-getting-error-on-executing-ns-command-4175420987/)

bhargavigoswami 08-08-2012 06:56 AM
RCP implementation over ns2.30, Getting error on executing ns command.
 
I tried alot to install RCP over ns2.30. But I was unsuccessful.
First I installed ns2.30. I could successfully do that over Fedora 17.
Second I downloaded RCP for ns2.30 from following link

http://yuba.stanford.edu/rcp/

But, I could not implement it successfully.

During RCP implementation over ns2.30, it does not give me any error.
But when I run ns command, I get following error:

[amg@localhost ~]$ ns
ns:
[code omitted because of length]
: invalid command name "Queue/DropTailVariant"
while executing
"Queue/DropTailVariant set drop_front_ false"


I m stuck now. Can't move forward my research.
Need your help. Please help me.

knudfl 08-08-2012 10:39 AM
Welcome to LQ.

Probably an error in one of the files from rcp-ns2.30.tar.gz .

I get the same poor result. And I have no solution, sorry.

.

bhargavigoswami 11-23-2012 11:22 PM
Got Solution for the problem.
Just need some changes in ns-default.tcl

Remove word "variant" and thats it. It start running smoothly.
Happy Researching......

knudfl 11-24-2012 02:58 AM
# 3

The ns-default.tcl from rcp-ns2.30.tar.gz :
Code:
$ cat ns-default.tcl | grep -nA 1 variant
889:Agent/TCP set lessCareful_ false ;  # for the Less Careful variant of
890-                                    # bugFix_, just for illustration.
I found no "variant" in the code. There is a "variant" in the comment, line 889.

Which line did you edit ?

.

bhargavigoswami 11-25-2012 09:07 PM
Quote:
Originally Posted by knudfl (Post 4835936)
# 3

The ns-default.tcl from rcp-ns2.30.tar.gz :
Code:
$ cat ns-default.tcl | grep -nA 1 variant
889:Agent/TCP set lessCareful_ false ;  # for the Less Careful variant of
890-                                    # bugFix_, just for illustration.
I found no "variant" in the code. There is a "variant" in the comment, line 889.

Which line did you edit ?

.
From rcp-ns2.30.tar.gz go to location ns2.30/tcl/lib/ns-default.tcl
there you would find few lines as follows:
Queue/DropTailVariant/RCP set alpha_ 0.4
Queue/DropTailVariant/RCP set beta_ 0.4
Queue/DropTailVariant/RCP set gamma_ 1

Here, you just need to remove word "Variant" and thats it, "save and make" and then code starts working smoothly.
Hope it was clear. If not, welcome to the queries.


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