[ns] class id in the packet header

[Tarik Alj]

fid_ does the job. I think class_ is deprecated.

>Date: Mon, 10 Jul 2000 19:02:40 +0800 (CST)
>From: Hei Xiaojun <sean@eea119.ee.ust.hk>
>To: ns-users@isi.edu
>Subject: [ns] class id in the packet header
>MIME-Version: 1.0
>
>hi, there 
>
>I notice that there is a member variable of "class_" in the class "Agent".
>The initialization is done in ns-default.tcl as the following:
>Agent set class_ 0   
>
>Are there any class identifier in the packet header? Or just use the fid_
>to do the job?
>
>Thanks
>
>sean

Tarik