Re: change switch model in multicast

[John Heidemann <johnh@ISI.EDU>]

On Mon, 29 Mar 1999 17:22:47 EST, Jaehee Yoon wrote: 
>Dear NS user group,
>
>I'm trying to change the switch model from end-to-end to hop-by-hop 
>basis in multicast. In my network model, each intermediate node should 
>store some information about its children, e.g. the next 
>hops of the node in the multicast tree, and etc. In this case, I think 
>that the transpot protocol needs to communicate with the IP layer 
>in the intermediate node, and it will be multicasting. I couldnt't find 
>enough documentation of the multicast internal, so I don't know which 
>part of the codes I have to change. 
>
>* Recompiling of ns-2
>I changed some of the files in the ns-2 directory, and recompiled it 
>with 'make'. (I didn't make big change, I just added more variables 
>to *.cc files for testing.) It was compiled successfully, but  there 
>is a problem executing NS simulator. Whenever I execute ns with the 
>command 'ns example.tcl',  I got the following error message.
>
>invalid command name "Simulator"
>    while executing
>"Simulator create _o1 "
>    invoked from within
>"catch "$className create $o $args" msg"
>    (procedure "new" line 3)
>    invoked from within
>"new Simulator"
>
>I installed the simulator from ns-allinone-2.1b4a at first time.
>
>Any help would be appreciated.

This problem is documented on the ``Installation Problems,
Bug Fixes, and Help'' web page.

   -John Heidemann