[Hansang Bae <hbae@xxxxxxxxxx>]

On 03:49 AM 11/25/2005, Iosu Oteiza Cilveti wrote:
>I am obtaininig Rtt statistics about a TCP connection.I would like to export the data of the RTT graphic.
>Which is the exact command that I have to introduce in tethereal,or there is a special tool for it??
>It would be ideal if it was possible to present it somehow aggregated - either with a graph or an exportable ASCII table (list?) that could be further processed.(Matlab,excel...)


Ethereal, Statistics, IO GRAPH, Advanced in the Y Axis, then tcp.analysis.ack_rtt will give you the graph.

Or you can get stats via tcptrace.  www.tcptrace.org  From the online manual:



1 arg remaining, starting with 'indica.dmp.gz'
Ostermann's tcptrace -- version 6.4.5 -- Fri Jun 13, 2003

153 packets seen, 153 TCP packets traced
elapsed wallclock time: 0:00:00.128422, 1191 pkts/sec analyzed
trace file elapsed time: 0:00:19.092645
TCP connection info:
1 TCP connection traced:
TCP connection 1:
        host a:        192.168.0.70:32791
        host b:        webco.ent.ohiou.edu:23
        complete conn: yes
        first packet:  Thu Aug 29 18:54:54.782937 2002
        last packet:   Thu Aug 29 18:55:13.875583 2002
        elapsed time:  0:00:19.092645
        total packets: 153
        filename:      indica.dmp.gz
   a->b:                              b->a:
     total packets:            91           total packets:            62      
           . . .                                  . . .
           . . .                                  . . .
     throughput:               10 Bps       throughput:               94 Bps  

     RTT samples:              48           RTT samples:              47      
     RTT min:                74.1 ms        RTT min:                 0.1 ms   
     RTT max:               204.0 ms        RTT max:                38.8 ms   
     RTT avg:               108.6 ms        RTT avg:                 8.1 ms   
     RTT stdev:              44.2 ms        RTT stdev:              14.7 ms   

     RTT from 3WHS:          75.0 ms        RTT from 3WHS:           0.1 ms   

     RTT full_sz smpls:         1           RTT full_sz smpls:         1      
     RTT full_sz min:        79.5 ms        RTT full_sz min:         0.1 ms   
     RTT full_sz max:        79.5 ms        RTT full_sz max:         0.1 ms   
     RTT full_sz avg:        79.5 ms        RTT full_sz avg:         0.1 ms   
     RTT full_sz stdev:       0.0 ms        RTT full_sz stdev:       0.0 ms   

     post-loss acks:            0           post-loss acks:            0
     
          For the following 5 RTT statistics, only ACKs for
          multiply-transmitted segments (ambiguous ACKs) were
          considered.  Times are taken from the last instance
          of a segment.
     ambiguous acks:            1           ambiguous acks:            0      
     RTT min (last):         76.3 ms        RTT min (last):          0.0 ms   
     RTT max (last):         76.3 ms        RTT max (last):          0.0 ms   
     RTT avg (last):         76.3 ms        RTT avg (last):          0.0 ms   
     RTT sdv (last):          0.0 ms        RTT sdv (last):          0.0 ms   
     segs cum acked:            0           segs cum acked:            0      
     duplicate acks:            0           duplicate acks:            0      
     triple dupacks:            0           triple dupacks:            0      
     max # retrans:             1           max # retrans:             0      
     min retr time:         380.2 ms        min retr time:           0.0 ms   
     max retr time:         380.2 ms        max retr time:           0.0 ms   
     avg retr time:         380.2 ms        avg retr time:           0.0 ms   
     sdv retr time:           0.0 ms        sdv retr time:           0.0 ms