[geeks] monitoring traffic on my switched LAN

Charles Shannon Hendrix shannon at widomaker.com
Tue Jun 12 15:35:13 CDT 2007


Charles Shannon Hendrix wrote:
> Jeff Cole wrote:
>> On Sun, Jun 10, 2007 at 12:44:36PM -0400, Charles Shannon Hendrix wrote:
>>> Well, the router is a Snapgear unit, embedded.  It has very limited capture
>>> ability because it has little internal storage.
>>>
>>> The switch supports RMON and SNMP, but I have no idea how to gather traffic
>>> data from a source like that.
>> MRTG? Makes pretty graphs from snmp queries. http://www.mrtg.org
> 
> OK, got it.  Not really what I want, but useful.
> 
> I'd like something that gave me text reports and parsable data, but I can work 
> on that later.
> 
> The graphics probably do 99% of what I want anyway.
> 
>> Also, information on collecting SNMP info from SnapGear units is at
>> http://www.cyberguard.info/snapgear/cgi-bin/fom?_highlightWords=mrtg&file=240
> 
> Anyone know where I could get a good configuration for a 3Com superstack 3300?
> 
> mrtg configuration is a bitch, at least it is to me.

Nuts, I left out too much.  Sigh...

Try again:

Automated mrtg configuration is a bitch, at least it is to me.

My network is not entirely stable, as some hosts come and go, and I wanted to 
try and set things up so that if I add a machine to the network, my mrtg 
configuration can "discover" it so I don't end up manually configuring.

It doesn't matter... I've decided to just configure all ports on my switch and 
deal with manually adding machines to my snmp monitor host.  I doubt I have 
time for much else right now.

-- 
shannon           | An Irishman is never drunk as long as he can hold onto
                   | one blade of grass and not fall off the face of the earth.



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