Re: obtaining port bits per second data from switch


Al Dykes wrote:
In article <c4_Ig.481115$Mn5.434420@pd7tw3no>,
Walter Roberson <roberson@xxxxxxxxxxxx> wrote:
In article <pan.2006.08.29.16.20.00.207109@xxxxxxxxxxxxxxxxxxx>,
Ben Thompson <bt4@xxxxxxxxxxxxxxxxxxx> wrote:
I would like to work out the bandwidth consumption of watching various
video streams on my machine.

I am not sure how best to measure this? Does anyone know if I can get
accurate data from the switch (e.g. via snmp). We have mostly HP switches
and a few Extreme.

You can't get accurate data unless you can manage to isolate the entire
link from source to destination from all other traffic. If, though,
you were to try the monitoring at various times of day, you might
get a set of approximations that were close enough for your purposes.

What you need is a standard snmp ifInOctets and ifOutOctets monitoring
over a time interval. A program such as MRTG can probably set this
up for you with little difficulty.



If you're running XP there is a tool called perfmon that will report
just about anything your PC is doing.

task manager has a basic network traffic chart.

If you need to isolate particular traffic and not just
monitor the whole of the ethernet port
then you might consider capturing the
traffic with Ethereal and then you can
plot various graphs.

You can capture on the same PC if the traffic
is not too much for it or maybe your network
kit supports "port mirroring" , "span port", "port monitoring"
in which case you can use a seperate PC to capture the traffic.

In ethereal - statistics/io-graphs
then apply filters.

Very nice.

.

Relevant Pages

  • Re: obtaining port bits per second data from switch
    ... accurate data from the switch. ... You can't get accurate data unless you can manage to isolate the entire ... What you need is a standard snmp ifInOctets and ifOutOctets monitoring ...
    (comp.dcom.lans.ethernet)
  • Re: obtaining port bits per second data from switch
    ... accurate data from the switch. ... You can't get accurate data unless you can manage to isolate the entire ... What you need is a standard snmp ifInOctets and ifOutOctets monitoring ...
    (comp.dcom.lans.ethernet)
  • Re: How do I get the port on a switch that a PC is connected to.
    ... With SNMP there are two distinct concepts. ... "the command tcpConnLocalPort" - you ... If the switch maintains this information, you are in luck and you can ... The advantage of this method is you can directly get the port of the ...
    (comp.protocols.snmp)
  • Re: How do I get the port on a switch that a PC is connected to.
    ... With SNMP there are two distinct concepts. ... If the switch maintains this information, you are in luck and you can ... the exact OID) or the GETNEXT command (does not require the exact ... The steps to get started with a MIB Walker are: ...
    (comp.protocols.snmp)
  • Re: Measure amount of network usage
    ... netflow is adequate to this task. ... cheap, but should be other free options out there), it will use SNMP ... you to graph each switchport on the switch (you would need to resolve ... connected to - as i use (up to 200 ports per switch). ...
    (comp.dcom.sys.cisco)