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Re: Assumption about the underlying network?



On Tue, 21 Sep 1999 11:35:06 PDT, "Huiwen Li" wrote: 
>Hello,
>
>I am trying to simulate a network from the upper layers, not touching lower
>2 layers of the network. But my simulation requires the underlying network
>is Ethernet. I am wondering if I am simulating at the upper layer (IP, TCP),
>what is the assumed about the underlying network? Can I set packetsize for
>the underlying network, like for Ethernet, about 1544 bytes?

Yes, you can set the packet size on a per-agent basis.

>Another question I have is about the LAN simulation. Is it possible for me
>the establish a complicated topology from the lower layer using make-lan? It
>seems to me that LAN simulation is only for a simulation inside a LAN, not
>able to do routing? Is there any such example? 

LANs should be able to do routing.  You can find examples by grepping
for "make-lan" in ~ns-2/tcl/{ex,test}.

   -John Heidemann