I really like to use Mikrotik's "The Dude" for the SNMP graphing and value history. It has a lot of value, though it may not do some of the really fancy things (ie: Google Earth API's) that other applications do. But for free, it's a powerful tool to use in conjunction with the Mikrotik appliances (and other vendors if you're willing to add the MIBs)! On 2014-04-22 13:15, Nigel Vander Houwen wrote:

Dean,

... 4. Yes. I need to configure the monitoring server to actually poll SNMP, and then we can tell the maps to use the RRD data. Since you say you've enabled that, I'll configure that now.

You are correct, since live data is based on the RRDs, if a client is disconnected, the latest RRD values will be 'U', and be presented to the javascript as nulls. I don't know that I'd replace that with the last good value, as that's no longer a true representation of the network, but I don't think I'd be opposed to having that data be potentially in the info box, though it would require some more work to set up.

Nigel K7NVH

You'd only show the last "old" value if you could show the date/time for it (and perhaps "thin" the connecting line). What would be really cool, is an app that captured (on a second-by second basis) and graphed (in the classical sense) the signal strength over time, either from your end or from the client's end. It would be especially helpful in setting up an antenna, rather than the bouncy values from "monitor" (I note that you can set the polling interval to a fraction of a second). Hmm, I wonder if Java (not JavaScript) has a decent API for SNMP (I presume that's the best way to capture the data). -- Rod Ekholm kc7aad@gmail.com