Re: Q: is more than 127 agents at one node possible?

[Padmaparna Haldar <haldar@ISI.EDU>]

On Thu, 1 Apr 1999, Igor V. Alekseev wrote:

> Hi, 
> 
> I am a new NS user and I ran into the following problem:
> 
> I need to simulate large number of concurrent TCP connections. I tried creating 
> the topology like this:
> 
> 1000 nodes ---- Router link Router ---- 1000 nodes, each node has one TCP 
> connection to one peer
> 
> In this case the machine I am using tends to dump core, without any complaints, 
> with the core size equal to all the available memory.
> 
> I tried changing the topology like this:
> 
> 1000 nodes ---- Router link Router ---- node #1001, each node has a TCP 
> connection to node 1001,  but I cannot make more than 127 agents to get attached 
> to one node.
> 
> Is there a way out of this? Perhaps some command to expand the port address 
> space, equivalent to "Node expandaddr" ?

you could use the ns primitive expand-port-field-bits <\#bits for portid>.
Please refer chapter 14 (The revised addressing structure in ns) of nsDoc
(at:http://www-mash.CS.Berkeley.EDU/ns/ns-documentation.html)
for detailed info on address issues.

--Padma.

> 
> TIA, 
> 
> Igor V. Alekseev
> Yaroslavl State University Internet Centre
> 

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Be true to your work, your word, and your friend.
--Thoreau

Padmaparna Haldar
ISI/USC.
310.822.1511 #352