Enabling IPDT?

[Rob Cluett]

I'm interested in enabling IPDT in my lab to correlate MAC addresses and IP addresses.  Does anyone have any experience with IPDT and if so could you supply a configuration example.  My understanding is merely enabling IPDT globally won't get it to work.  It as a feature depends on other features for it to operate successfully.  Any guidance would be greatly appreciated.

[Leo Laohoo]

My understanding is merely enabling IPDT globally won't get it to work.  

IP Device Tracking needs to be enabled globally and at an interface-level. 

[Rob Cluett]

Thanks for the response Leo.

After applying it globally and per interface all I'm left with in the config of the switch is the below.  I wonder if it's not actually supported in my version of IOS or the platform.

[Leo Laohoo · Accepted solution]

Global config:  ip device tracking 

Interface config:  ip device tracking max <NUMBER>

[Rob Cluett]

It works. Thank you Leo.

[Leo Laohoo]

Happy to hear that it's finally working, Rob.  

By the way, we only use one IPDT configuration in our interface (ip device tracking max <NUMBER>) and one line in the global.  We didn't bother with the rest. 

Another handy "show" command to use is "sh ip device track interface <BLAH>".  This will minimize the eye strain when the output stretches out to a large switch stack.

[Rob Cluett]

Thanks again Leo.  One caveat...

When I power up my simulation and check my two switches for the first time with the "show ip device tracking all" command it shows only the default gateways. If I begin pinging IPs it might show it in the output or it might not.  I assumed I would just run the command and see all IPs/Macs that were attached to the interfaces.

Am I seeing a bug in my simulation software?

[Leo Laohoo]

Try to shut/no shut the ports.  Make sure the downstream clients are logged in.

[Rob Cluett]

I'll give that a go.  Thank you Leo.

[Rob Cluett]

Bouncing the interfaces didn't improve matters. I'm not sure if it's failing due to the simulation platform I am using.