Re: FlowID number wraps around at 255.

[Haobo Yu <haoboy@isi.edu>]

I assume you were using PagePool/WebTraf. It sets the fid_ of the tcp
agents in PagePool/WebTraf::launch-req{} in tcl/webcache/webtraf.tcl. The
object id is got from WebPage::LASTOBJ_ in webcache/webtraf.cc (triggered
in WebPage::expire()). 

As you can see, LASTOBJ_ is a global integer so I don't see why it would
wrap around at 255. 

- Haobo

BTW, I tested it with tcl/ex/large-scale-web-traffic.tcl, and I could not
see the flowid wrap around in the output ns trace file. 

On Tue, 14 Dec 1999, Peter Pieda wrote:

> Hello,
> 
> Is there a way to prevent the FlowId wrap around of 255?
> 
> I haven't been able to track down where the fid_ is incremented or wrapped
> around, etc.
> Checked out the defination of FlowId, int fid_, and it allows for a much
> larger range of flowIds than 255.
> 
> I'm using the PagePool/WebModel. In this model, each object has a TCP
> connection
> with a FlowId allocated for it. i.e. If you have 1 session, 2 pages, and 3
> objects per page,
> the values of FlowId include 1,2,3,4,5,6. 
> 
> Therefore, If I have in total more than 255 objects to be transmitted, the
> FlowIds
> start to be repeated.
> 
> I'm trying to track the transactions per second for example, so I
> trace the number of FlowIds being used, or repeated etc. This works ok. 
> But, depending on the # of concurrent Objects and the # of Clients/Servers,
> this method
> won't work. 
> 
> Thanks for your help.
> 
> Peter
> 
> 
> 
> > -----Original Message-----
> > From:	Yung Yi [SMTP:yiyung@mmlab.snu.ac.kr]
> > Sent:	Tuesday, December 14, 1999 1:45 AM
> > To:	George Khoury (ERA)
> > Cc:	ns-users
> > Subject:	Re: RTP/UDP
> > 
> > If you can get help about RTP,
> > Just see
> > $ns/rtp.cc, session-rtp.cc
> > $ns/tcl/rtp/*.
> > 
> > You are right.
> > In ns , rtp and udp is not separated from each other.
> > 
> > ----- Original Message ----- 
> > From: George Khoury (ERA) <George.Khoury@era.ericsson.se>
> > To: <ns-users@mash.CS.Berkeley.EDU>
> > Sent: Tuesday, December 14, 1999 7:13 AM
> > Subject: RTP/UDP
> > 
> > 
> > > Hi all ns-users,
> > > 
> > > I have a question regarding the protocol suite RTP/UDP.
> > > 
> > > I would like to use the suite RTP/UDP in my simulations but I don't know
> > how to do it. In ns RTP and UDP are separate agents thus I cant use them
> > together in the same node.
> > > 
> > > I have looked in udp.cc and could see that the udp header is using the
> > rtp header but I couldn't understand in which way.
> > > 
> > > I would appreciated if someone could give some advice.
> > > 
> > > Thanks in advance
> > > 
> > > Best Regards
> > > 
> > > George 
> > > 
> > > 
>