How long does a port have to be down before UDT reports it as "available" or "unavailable"?

I bought UDT to help me learn more about my switches, including how many ports are available to use, versus how many are not available (already in use).

Condition: UDT reports a switch as having zero available reports.

Problem: When I SSH into that switch and issue the command "show int status | in not", I see five or ten ports "notconnected." That means they're available to be used.

Double-check: I build a custom report to show which ports have no link, and how long they've been without link (see my instructions for this here: How to create a report displaying the Last Time Data was Transmitted or Received on a Switch Port ). The report confirms what the SSH command shows--that some ports have been down (available) twenty days.

So where is UDT failing to report the available ports?

Is there some threshold in UDT that says to call a port "unavailable" until it has been down at least X number of days?

UDT appears to be discovering/monitoring all the ports in the switch.

Where have I gone wrong installing or configuring UDT?

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chad.every

I found out when troubleshooting something similar with UDT is that the port active/not active counter is not polled directly from the switch itself via snmp. So I'd run a report of all inactive ports for greater than 30 days and it would come back with a fraction of ports it should have. The port status is based on when UDT saw the port active or inactive. So, i had to give more time in polling as port statuses changed over time to make the report more accurate. Hope that makes sense.

rschroeder

What parameters do you use now for the time required before a report is accurate?

chad.every

I was just using one of the out of the box reports, nothing fancy. This was over a year and a half ago when i was doing my testing. I just had to make sure that if I was running a port for last 30 days of port activity that I had at least 30 days of UDT polling the switch. So if the report changes to 3 month as an example, you have to basically get 3 months of polling in UDT before that report will be accurate.

rschroeder

You've piqued my curiosity. What results when you use a report for 30 days, but you've only have ten days of polling?