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mac address not showing

I was in a Cisco 2960S and I was able to ping an IP address. However when I do sh arp | inc, it did not display it. I had to do sh mac address-table to find that MAC address with the port it is connected to. I want to know why sh arp did not show that IP address. Usually it does. Thanks
Switches / HubsNetwork AnalysisNetwork Architecture

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Don Johnston

8/22/2022 - Mon
Don Johnston

Is the 2960 in layer 2 mode or layer 3 mode?  
Is the host directly connected to the 2960?
Is the host on the same IP network as the management address of the switch?

layer 2 for 2960. is directly connected to the 2960.
it is not the same as the management subnet.
Don Johnston

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Hmm... So it is difficult to locate the port where the device is connected to.
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yes. I did the sh arp at the DG and get its MAC address from there. then I went to the switch where it is connected to the do sh mac address, then discover the port that way.
Don Johnston

Right...  Just an extra step.