[mrtg] Ambiguous graphs

Vaibhav Bawa VaibhavB at niit.com
Fri Sep 13 08:35:16 MEST 2002

Hi All,

I'm attaching a gif image that shows the traffic activity of a 1.544 Mbps
link. In this case I've also enabled Threshold checks on Incoming traffic so
that when there is 'zero %' Incoming traffic, a script runs that informs the
concerned that the link has become inoperational. But the graphs show
Outgoing traffic activity, even when the Incoming traffic is 'zero %'. 



Max  In:	 1539.6 kb/s (99.7%) 		Average  In:	 38.0 kb/s
(2.5%) 		Current  In:	 640.0 b/s (0.0%) 	
Max  Out: 1535.2 kb/s (99.4%) 		Average  Out:	 362.3 kb/s (23.5%)
Current  Out:	 480.4 kb/s (31.1%) 	
Average max 5 min values for `Daily' Graph (5 Minute interval):   In: 46.4
kb/s (3.0%)/ Out: 499.2 kb/s (32.3%)	


Anyone will assume that if the link were down, both Incoming and Outgoing
traffic would become 'zero %'. I wonder if MRTG is actually giving a true
picture of the link status in my case. Any ideas?

Vaibhav Bawa

Divisional LAN Administration
NIIT Technologies
e mail: vaibhavb at niit.com

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