Re: [ns] Diffserv Question---Calculate RTT for a TCP flow at a EdgeRouter?

[Xuan Chen <xuanc@ISI.EDU>]

You can get the information needed from the trace file, find the right
entries and calculate the RTT (instance RTT, not SRTT, right?) with a
simple perl script. 

-chen xuan


 On Thu, 12 Apr 2001, [gb2312] ���滪 wrote:

> Hi,
> I want to implement functionality that requires dynamically
> calculating RTT times for a TCP flow passing through edge router for Differentiated Services. 
> I cannot make use of the TCP Agent's RTT data, since the node in question can be an
> intermediate node in a data path, without a TCP Agent associated with it.  I
> want to calculate the RTT between that node and the destination, ignoring
> any previous nodes in the data path.
> 
> So, I'm not sure how to solve the problem of calculating a TCP flow's RTT
> between a given node and the flow's destination.  If anyone has any
> suggestions, the help would be appreciated greatly.
> 
> Thanks,
> Xu zuhua
> 
> 
> 
> 

-- 
Xuan Chen
USC/ISI