Re: [ns] TCP segment size vs. IP packet size

[WangYaogong]

1) It's the size in Bytes of the TCP payload, excluding TCP header and IP 
header. 
eg. If you set packetSize_ of the TCP Agent to be 1000, then the actual size of 
the IP datagram is 1040. You can validate this from the trace file.
 
2) I don't think it matters anything. Queue limit is measured in packets. The 
size of the packet doesn't affect anything.
3) I'm not sure about it.



> Date: Thu, 13 Sep 2007 15:15:21 +0200> From: [EMAIL PROTECTED]> To: 
> ns-users@ISI.EDU> Subject: [ns] TCP segment size vs. IP packet size> > > Hi,> 
> > I need some help distinguishing cases when NS is thinking about TCP > 
> segments vs. when it's thinking about IP packets, since it seems to me > that 
> they're used almost interchangeably.> > In particular:> > 1) Is packetSize_ 
> in TPC agents the IP packet size or TCP segement size?> > 2) When using a 
> command like "$ns queue-limit $n0 $n1 100", is the queue > limit expressed as 
> the number of TCP segments or IP packets? Does the > distinction even make 
> sense in this case?> > 3) When simulating web traffic (such as in 
> tcl/ex/web-traffic.tcl) using > a command like "$pool create-session 1 
> $numPage 0.2 $interPage $pageSize > $interObj $objSize" is objSize in TCP 
> segments or IP packets? Again, is > the distinction meaningful here?> > > -- 
> > Jasin> 
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[ns] TCP segment size vs. IP packet size

[Jasin Zujovic]

Hi,

I need some help distinguishing cases when NS is thinking about TCP 
segments vs. when it's thinking about IP packets, since it seems to me 
that they're used almost interchangeably.

In particular:

1) Is packetSize_ in TPC agents the IP packet size or TCP segement size?

2) When using a command like "$ns queue-limit $n0 $n1 100", is the queue 
limit expressed as the number of TCP segments or IP packets? Does the 
distinction even make sense in this case?

3) When simulating web traffic (such as in tcl/ex/web-traffic.tcl) using 
a command like "$pool create-session 1 $numPage 0.2 $interPage $pageSize 
$interObj $objSize" is objSize in TCP segments or IP packets? Again, is 
the distinction meaningful here?


-- 
Jasin