Re: Question about two agents attach to one node?

[Lloyd Wood <eep1lw@surrey.ac.uk>]

On Thu, 20 Aug 1998, Tom Henderson wrote:

> On Thu, 20 Aug 1998, Wenjie Weng wrote:
> 
> > I create two nodes.  Node 0 [n(0) in my script] has two agents attached 
> > to it. One uses FTP source object (the packet size for this traffic is
> > 1000), the other uses TELNET source object (the packet size is 50). Node
> > 1 also has two agents attached to it. When I run this simulation, the trace
> > file shows only the FTP source are transmitted. Can any one tell me why?
> > 
> 
> Telnet sources do not immediately send a packet upon starting (they wait
> for a timeout). 

RFC 896 - Nagle algorithm, one presumes. That mentions an imposed
delay of 200-500ms for various telnet and X.25 PAD implementations to
collect keypresses together into fewer packets; I didn't realise it
would affect telnet startup too... 

Cheers,

L.

> Your simulation is running for only 0.5 seconds, so
> perhaps the first telnet packet arrival does not come before this time.
> 
> Tom

<http://www.ee.surrey.ac.uk/Personal/L.Wood/>PGP<L.Wood@surrey.ac.uk>