Re: [ns-2] Re: help

[kfall@ee.lbl.gov]

>
> From:  Kathleen Nichols <knichols@baynetworks.com>
> To:    "Christoph Haenle" <christoph@starburstcom.com>
> cc:    "Dapeng Wu" <dpwu@acts.poly.edu>, <ns-users@mash.cs.berkeley.edu>
> Subject: Re: [ns-2] Re: help
> Date:  Mon, 18 Aug 1997 16:23:59 PDT
>
> >Hi Dapeng,
> >
> >> Would you please point me out if there is any ATM module in ns1 or ns2
> >> or I should program ATM module by myself?
> >
> >ATM and the MBone are not compatible. For example, the MBone is a datagram
> >service, whereas in ATM, the network must be informed upon call setup. It
> >then finds a route to the destination(s) and might reserve resources (at
> >least if service requested is not UBR).
> >
> >As ns-2 imitates the Internet/MBone, it cannot handle ATM-traffic.
> 
> (lots of deleted stuff)
> I'm not sure what kind of ATM simulation Dapeng is attempting to do, but
> if ATM is being treated as essentially a MAC layer, I don't see why
> you can't add it to ns-2. Though I had to admit it, I wrote some
> segmentation and reassembly agents for my own version of ns-1. There was
> no ATM signalling included since the MAC I was simulating was just using
> the cellification of ATM. It would be a moderate amount of work to do
> an ATM MAC, but I don't see any reason why it couldn't be done.
> 
> 	Kathie Nichols
> 

Yes, I'd agree with Kathie.  If the intention is to look primarily at the
ATM layer (with less emphasis on IP), there are some other simulators,
(e.g. ftp://isdn.ncsl.nist.gov/atm-sim/ or
http://HTTP.CS.Berkeley.EDU/~bmah/Software/Insane/).

- K