






                        Nest - A Network Simulation Testbed


            _A_d_d_r_e_s_s:
            Jed Schwartz
            450 Computer Science Building
            Columbia University
            New York,  NY  10027

            _E-_m_a_i_l: jed@douglass.columbia.edu

            _P_h_o_n_e: (212) 854-8192


            _D_e_s_c_r_i_p_t_i_o_n

            The NEST simulation package developed  at Columbia  provides
            a  generic framework for simulating networks and prototyping
            distributed systems.  The NEST  simulation runs  in  a  sin-
            gle   UNIX   process,  and   the   NEST  monitor  runs  in a
            separate process, which  may  be  remote.   Simulations  are
            created  using  the NEST library, a C-language library which
            runs under the all UNIX variants on VAX and 680x0 processors
            (SPARC  and  RT soon).  The library provides a simple, high-
            level message-passing facility among  a  set  of  concurrent
            lightweight  processes  which simulate a distributed system.
            Simulations can be interactively monitored and managed using
            the  standard  Nest  monitor  program, which permits dynamic
            reconfiguration  of  the  simulation.   It  is  possible  to
            create/halt/continue/destroy  simulated nodes and links, and
            to alter their  function and parameters, while a  simulation
            is  in  progress.   Multiple monitors at different sites can
            monitor a single simulation. The  monitor  is  a  monochrome
            SUNView  application  (an  X Windows implementation is under
            development).

            _N_e_t_w_o_r_k _a_c_c_e_s_s

            Both documentation and full sources  are  available  on  the
            Columbia Vax [columbia.edu: 10.3.0.89].

            There are four files in the ~ftp/pub directory:
            _________________________
            The information in this section is provided  in  accor-
            dance  with the copyright notice appearing at the front
            of this guide.




            June 28, 1989               NNSC        Section M.5,  Page 1








            221184 bytes    nest-25-doc.tar  Lineprinter formatted documentation.
            438272 bytes    nest-25-doc2.tar Scribe and PostScript formatted docs.
            339968 bytes    nest-25-src.tar  Source for Nest simulation library.
            208896 bytes    nest-25-disp.tar Source for user interface display.


            _W_h_o _C_a_n _U_s_e _t_h_e _S_e_r_v_i_c_e

            Nest is  available without cost to non-profit  research  and
            educational  organizations  which have access to the  Inter-
            net.   Others may order a tape through mail for  a  cost  of
            $100. by contacting Jed Schwartz at the above address.  Nest
            is made available for research purposes only.   No  part  of
            the  Nest software may be redistributed by itself or as part
            of any software  package,  except  by  express  arrangement.
            For-profit  organizations  and those without Internet access
            may order a Nest tape through mail for a cost  of  $100.  by
            contacting Jed Schwartz at the above address.

            _M_i_s_c_e_l_l_a_n_e_o_u_s _I_n_f_o_r_m_a_t_i_o_n

            Please   direct   technical   questions   to   Alex   Dupuy:
            alex@columbia.edu, (212)854-4290




























            June 28, 1989               NNSC        Section M.5,  Page 2


