From netramet-owner  Wed Aug 13 14:26:33 1997
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From: Rosana C de M Grillo Goncalves <[email protected]>
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Subject: Sampling frequency of the meter
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Hi,

I've been using Netramet+Nemac for 6 months, and now I'm doing an
application similar to fd_extract, but  I still  have some doubts:

               1) in two  consecutives reports of the same flow, I got:
..... LastTime = 21120  number of packets from = 4 ....
..... LastTime = 21792  number of packets from = 9 ....
What does it mean? there is an interval of 672 hundreds seconds,  with
5 packets from ....    is there a way of decreasing
this interval, and to have an output as:
......LastTime = 21120 number of packets from = 4 ....
......LastTime = 21346 number of packets from = 6 ....
......LastTime = 21792 number of packeta from = 9 .... ??

Thanks in advance,


               Rosana  Grillo Goncalves
       University of Sao Paulo - Brazil


From netramet-owner  Wed Aug 13 19:04:58 1997
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From: Torsten Naumann <[email protected]>
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To: Rosana C de M Grillo Goncalves <[email protected]>
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Subject: Re: Sampling frequency of the meter
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On Tue, 12 Aug 1997, Rosana C de M Grillo Goncalves wrote:

Hi,

> I've been using Netramet+Nemac for 6 months, and now I'm doing an
> application similar to fd_extract, but  I still  have some doubts:
>
>               1) in two  consecutives reports of the same flow, I got:
> ...... LastTime = 21120  number of packets from = 4 ....
> ...... LastTime = 21792  number of packets from = 9 ....
> What does it mean? there is an interval of 672 hundreds seconds,  with
> 5 packets from ....    is there a way of decreasing
> this interval, and to have an output as:

This interval means the time left since the last occurance of at least
one packet of this flow. The value is in 1/100 seconds. So the
difference between 21792 and 21120 is 672 1/100 secs --> 6.72 seconds.

ntm34.ps (NeTraMet doc):
------------------------
..
FirstTime
  Time (in 1/100 second ticks from the time the meter started
  executing) at which this flow was first observed by the meter.

LastTime
  Time (units as above) at which a packet was last observed for
  this flow.
..

> .......LastTime = 21120 number of packets from = 4 ....
> .......LastTime = 21346 number of packets from = 6 ....
> .......LastTime = 21792 number of packeta from = 9 .... ??

How you called the NeMaC (I interest in the command line)

The switch -c <secs> can specify the collect interval e.g.

  $ NeMaC -c 120 -f rules.local meter_host write_community

defines the collect interval with 120 seconds

I hope that's what you want to know.

--
bye Torsten

# Torsten Naumann * [email protected] * +49-177-2382319
# Computer Science - TU Chemnitz - FRG * # http://www.tu-chemnitz.de/~tna
# PGP-public-key available via finger on email-address


From netramet-owner  Fri Aug 22 23:19:44 1997
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Date: Fri, 22 Aug 1997 11:39:49 +0100
From: Konstantinos Damianakis <[email protected]>
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I am trying to set NeTraMet to work on a PC but I cannot find the
WATTCP packet driver or something like that.
Could you help me by either including the binaries for the PC
or by givinbg me an address from where to download it ?
Does it work with all Ethernet cards ?
Please reply to [email protected]

Thanking you in advance,
Konstantinos Damianakis
MSc student in University of Kent at Canterbury


From netramet-owner  Thu Aug 28 03:49:51 1997
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Date: Wed, 27 Aug 97 16:39:04 GMT
From: "DMiranda" <[email protected]>
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To: Nevil Brownlee <[email protected]>
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Subject: Bus Error when running NeTraMet. (now within gdb)
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    Hi Nevil and you all!


    I just run NeTraMet within gdb (GNU Debbuger) and the results are the
    following:

    Note: As I explained in my first mail the "Segmentation Fault" and "Bus
    Error" appear when I run NeTraMet with no parameters. (i.e.: counting one
    out of one packets). When running it with the command -n100 (count one
    packet out of 100) it works well. (altough sometimes the errors appear!)


    RESULT 1) The program stops in the line 345 of the file "meter_ux.c". It
    seems that the pointers p or h (pointers of the headers of the
    packets...I'm not sure about that!) lost their correct addresses.

    See below the result of gdb:



    (gdb) run
    Starting Program: /ntm41-b13/src/meter/NeTraMet
    NeTraMet: Network Traffic Meter V4.1
    Running on homer, interface le0

    Program received signal SIGBUS, Bus error.
    0x13ca8 in ether_callback (user=0x18010000, h=0x5dae0f,
       p=0xb47f00 <Address 0xb47f00 out of bounds>)
       at ../../src/meter/meter_ux.c:345

    345        if (h->ts.tv_sec != last_t_sec) {




    RESULT 2) The gdb result is the same when a "Bus Error" or  a "
    Segmentation Fault" occur. The only thing that changes is that the
    "received signal" is "SIGSEGV" for a segmentation fault and "SIGBUS"
    for a bus error.


    I will appreciate very much the help you can give me with this
    problem.

    Thanks in advance.

    Regards.

    Denys Miranda.
    Broadcom Eireann Research Ltd.

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