[mrtg] Re: Dual T1's

Hart, Kevin KHart at helixtechnology.com
Wed Apr 14 22:00:25 MEST 2004


Joe,

A nice feature of MRTG is to check on per packet load balancing. In other
words if your ISP
is balancing traffic across the two T1s, then the individual graphs should
be almost exactly
the same, and if not, you will know there is a problem. 
 
There is no reason why you can't graph both individual and combined T1
traffic, which is what we do.

Kevin

-----Original Message-----
From: Merton Campbell Crockett [mailto:mcc at CATO.GD-AIS.COM]
Sent: Wednesday, April 14, 2004 3:55 PM
To: Joe Paragona
Cc: Tim Sheets; mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: Dual T1's


On Wed, 14 Apr 2004, Joe Paragona wrote:

> 
> Thanks everyone for your input. . . .I did originally run cfgmaker when
the
> 2nd line was installed,
> but I will rerun cfgmaker on that router, just to play it safe.
> 
> But I guess what I am really looking for is a combined view, like Tim had
> mentioned.
> 
> What would be the best way to go about "advanced" config file tweaking?

Each T1 will have its own interface.  You can combine the data by using
the Target line generated by configmkr or one that you manually created.

 Target[ISP_Se0_0]: #Se0/0:mrtg at ISP.DOT.COM + #Se0/1:mrtg at ISP.DOT.COM
 MaxBytes[ISP_Se0_0]: 384000

The above Target example adds the data collected from both interfaces
together.  The MaxBytes entry sets the appropriate bandwidth.


Merton Campbell Crockett
> 
> 
> 
> 
> 
> 
> > -----Original Message-----
> > From: Joe Paragona [mailto:joe.paragona at carat.com]
> 
> > A second full T1 was added to my Internet router.  However my
> > graph for that router still shows 1500k bits per second, like
> > there is only one full T1.
> 
> Joe,
> 
> You need to run cfgmaker against the router again.  It is most likely
> grabbing information off only the interface that was up when you started
> at the beginning of the year.  Traffic statistics are kept on a
> per-interface basis.
> 
> If you want a combined view, you will need to do some more advanced
> config file tweaking.
> 
> Tim
> 
> 
> 
> 
> 
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