I am still struggling with ns2. So I am writing down the steps needed ( might be helpful ) to install ns2.

$ sudo apt-get install axel

$ axel http://www.isi.edu/nsnam/dist/ns-allinone-2.30.tar.gz

axel is just a download accelerator, anyone can use whatever they like , wget or whatever. I like axel

$ sudo apt-get install build-essential autoconf automake libxmu-dev

$ tar -xzvf ns-allinone-2.30.tar.gz
$ cd ns-allinone-2.30
$ ./install

so now comes the enormous error & warning I am facing...
I think this troubleshooting part is more or less same for ns2.27/2.28/2.29 etc.
for me, I am doing it with ns2.28

# tcl building error...
apply the following patch:

Click This Link

so,
$ axel http://www.ece.uc.edu/~cdmc/ucbt/src/ns2292-gcc410.patch

now open the patch in text editor and edit the version according to what version of ns2 you are using i.e. replace ns-2.XX, tcl8.4.XX, tk8.4.XX,otcl-XX,namXX with your own.

now apply :
$ patch -p1 < ns2292-gcc410.patch

{The TCL building error can be solved manually also, without the patch:

the following files will have to be modified.

tcl: file tcl8.x.x/unix/tcl.m4
tcl: file tcl8.x.x/unix/configure
tk: file tk8.x.x/unix/tcl.m4

tk: file tk8.x.x/unix/configure
otcl: file otcl-1.x/configure.in

The line generating the problem was :

system=MP-RAS-`awk ' { print $3 } '/etc/.relid'`

I changed the above line to:

system=MP-RAS-`awk ' { print $3 } '/etc/.relid`

SO:
Remove the second last character ( ' ) from the line and do this for all the files above ; delete older configure file in the respective
folders.
Then run in the respective directories ,
$ autoconf
to generate a fresh configure file which were deleted earlier.}


#error
queue/cbq.cc:1002: error: ‘cbq_’ was not declared in this scope
make: *** [queue/cbq.o] Error 1

Solution:

edit ns-2.27/queue/cbq.cc

#define LEAF_LEVEL 1 /* level# for leaves */
#define POWEROFTWO 16

+class CBQueue;
+
class CBQClass : public Connector {
public:
friend class CBQueue

/// to be continued.....