[mrtg] Re: MRTG Bandwidth Limits?

[Michael Bailey]

I might have similar problem.

How do you set up using 64bit counters

Thanks

Michael

-----Original Message-----
From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch]
On Behalf Of Alex Nguyen
Sent: 18 November 2002 18:19
To: Jeff Strahl
Cc: 'mrtg at list.ee.ethz.ch'
Subject: [mrtg] Re: MRTG Bandwidth Limits?



Jeff,

Did you use 64bits counter instead of 32bits ?

With 32bits counter, the counter will wrap within 300 seconds at
~114Mbps.

A.

On Mon, 18 Nov 2002, Jeff Strahl wrote:

JS> Date: Mon, 18 Nov 2002 12:01:16 -0600
JS> From: Jeff Strahl <Jeff.Strahl at grandecom.com>
JS> To: "'mrtg at list.ee.ethz.ch'" <mrtg at list.ee.ethz.ch>
JS> Subject: [mrtg] MRTG Bandwidth Limits?
JS> 
JS> 
JS> We have been using MRTG for while now, but it is until recently, 
JS> that we have had enough bandwidth on a couple of interfaces that we 
JS> have identified a problem.  Now, let me first state, that I do not 
JS> know if this is a reporting problem of MRTG, or a problem within our

JS> router that we are polling.
JS> 
JS> The MRTG version that we are currently running is: 2.9.17
JS> 
JS> The interfaces experiencing the problem: OC3 POS & OC3 ATM (both 
JS> reside within the same VIP4-80, within a Cisco 7507 router with dual

JS> RSP4s)
JS> 
JS> The symptoms of the problem are whenever we hit our peak time, if 
JS> the bandwidth exceeds ~110 Mb/sec, the graphs simply draw a flat 
JS> line _very_ close to zero instead of the true bandwidth amount, for 
JS> I have connected to the router during the time that this is seen, 
JS> and the bandwidth stated via 'show interface POS4/1/0' is consistent

JS> with what I would expect to be passing at that time.  Also, it 
JS> should be stated, that I do not have MRTG configured to draw 
JS> unknowns as zero (one of the reasons that this strikes me as odd).  
JS> On the other hand, the ATM interface simply draws straight lines 
JS> whenever this interface exceeds the stated amount of ~110 Mb/sec.  
JS> Like I said, I don't know if this is a problem with MRTG, or the 
JS> router, but I needed to start somewhere, and since it appears that 
JS> the MRTG graphs are broken, rather than the manual reporting of the 
JS> router, I decided to start here.
JS> 
JS> I appreciate any insight anyone might have with this problem.
JS> 
JS> Thanks,
JS> 
JS> Jeff Strahl
JS> 
JS> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
JS> Jeff C. Strahl
JS> Sr. IP Network Engineer
JS> Packet Networks
JS> Grande Communications Networks, Inc.
JS> 401 Carlson Circle
JS> San Marcos, TX 78666
JS> Phone - 512.878.5465
JS> Cell - 830.620.8176
JS> Fax - 512.878.4284
JS> Email: jeff.strahl at grandecom.com
JS> 
JS> We will individually and as a Team:
JS> 	-	Work cooperatively, delivering what we said we would
JS> 	-	Be honest and truthful - showing respect for others
JS> 	-	Be easy to do business with - internally and externally
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JS> commitment
JS> 	-	HAVE FUN!
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