We are using op manager version 7 running on Windows XP and we use the Traffic Analysis of Ethernet Interface graph to see how much bandwidth each port is using. We have some switches that work fine and we get monitoring intervals of around 1-2 seconds but some switches are completely random, an example of the monitoring intervals are below.

I cant see any issues and they are both setup the same. Can anyone help?

Here is the link for the graph we are able to see:  http://OpmanagerIP:8060/devices/InterfaceGraphZoom.do?InterfaceName=SWITCHIPADDRESS_Port36&hcTraffic=false&timePeriod=Today&graphName=Traffic&keepDivOpen=true

16-Dec 3:59 PM	577.349	35.342 k
16-Dec 3:43 PM	596.639	34.7 k
16-Dec 3:27 PM	632.76	32.255 k
16-Dec 3:11 PM	638.378	49.635 k
16-Dec 2:55 PM	634.966	45.298 k
16-Dec 2:39 PM	637.416	57.235 k
16-Dec 2:23 PM	605.702	47.89 k
16-Dec 2:07 PM	641.781	46.813 k
16-Dec 1:51 PM	616.619	41.336 k
16-Dec 1:35 PM	1.004 k	42.675 k
16-Dec 1:19 PM	785.284	36.628 k
16-Dec 1:03 PM	6.128 k	271.108 k
16-Dec 12:47 PM	3.375 k	121.649 k