[ale] measuring bandwidth

[Brandon Checketts]

I believe the ifconfig counters are 32-bit, so they reset after about
4GB of traffic.  You would have to read them occasionally, and note that
when one reading is lower than the previous reading, you need to make up
the difference in your reading.

As others have noted, MRTG, Cacti, and most monitoring applications
should have this built in.


Thanks,
Brandon Checketts


J. D. wrote:
> Hey all,
> 
> I need to measure some bandwidth on a bunch of linux servers. At first
> we took a snapshot of the ifconfig output at the beginning and end of
> the day. The intent was to compare the differences. Apparently there
> were some is some sort of cycle or reset in the data that causes it to
> be inaccurate for this purpose. The value at the end of the day ended up
> being less than the start of the day.
> 
> It appears this method is invalid at least on the redhat 5 distro in
> use.. Any ideas on other ways to collect this data?
> 
> Best regards,
> 
> J. D.
> 
> 
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