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Ciscoworks detailed device report Last Changed Information

How does the last changed in detailed device report get generated? In some reports I recieve negative numbers and was wondering how this attribute is set and how do we adjust that setting.

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Cisco Employee

Re: Ciscoworks detailed device report Last Changed Information

The Last Changed column in the Detailed Device Report comes from an SNMP poll of the MIB object ifLastChange. This is the value of sysUpTime at the time the interface entered its current operational state. This will not change unless the interface operational state is changed or the device is rebooted.

You have to do a little math to find out the exact amount of time the port has been in its current state.

Here's an example of how you would calculate this info:

example)

A the top of the report you will see the SysUpTime as of last Inventory Collection. If it had a value of 2 months, 17 days, 4 hrs, 23 mins it is really is 2 months, 17 days 04:23:00.

Then if you look at an entry under something like Processor Port Interfaces (Processor Index 1, Interface Index 3, Port Index 1, Port Description Short Wave fiber Giga Ethernet) it shows Last Changed is 0:2:10.

That means the condition of this port has not changed since the device SysUpTime was 0 days, 0 hrs, 2 minutes, 10 seconds.

You subtract the Last Changed value (0:02:10) from the current SysUpTime value (2 months, 17 days 04:23:00) to get the exact amount of time the port has been in this state.

This port has been in this operational state for 2 months, 17 days, 4 hrs, 20 minutes and 50 seconds.

(23:00 minutes - 2 minutes 10 seconds = 20 minutes 50 seconds)

There is nothing in RME that can tell you the exact time the port has been in its current operational state. It can only report the information it gets via SNMP. The "Last Changed" column is not very intuitive, but, basically, the lower the number under Last Changed, the longer the port has been in that operational state.

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