Frame Relay in ns
Sat, 21 Mar 1998 14:13:30 +0500 (PKT)
On Fri, 13 Mar 1998, Kevin Fall wrote:
> I would recommend against using "Network". It is being used within
> the context of emulation, and is used to abstract a live, real-world
> network that gets interfaced with a running simulation.
> As for your issue with FR, you can't use the existing set of
> nodes an links to model the FR net? If not, what problem(s)
> have you run into?
Kevin, what we have to do is to simulate fragmentation (as in say RFC1490,
e.g. large IP datagram would be fragmented into several frames) and frame
relay switches (which would be in an FR cloud). Basically a TCP source,
sink and an FR cloud in between. TCP should not be able to see the
internal FR switches. This is about it and then there is support for CIR,
setting the DE (discard eligible) bits in frames according to a
probalistic distribution, etc.
Can this be done using the existing nodes and links ?? Won't we have to
create our own new objects in C++ and OTcl ?
thanks in advance for your help!
Armughan Javaid email@example.com / firstname.lastname@example.org
B.Sc.(Hons) Class of 1998 LUMS, Lahore, Pakistan
Computer Science http://www.lums.edu.pk/~b98008