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mac address not showing

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Last Modified: 2014-05-20
I was in a Cisco 2960S and I was able to ping an IP address. However when I do sh arp | inc 10.10.10.1, 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
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Don JohnstonInstructor
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Commented:
Is the 2960 in layer 2 mode or layer 3 mode?  
Is the 10.10.10.1 host directly connected to the 2960?
Is the 10.10.10.1 host on the same IP network as the management address of the switch?
leblancAccounting

Author

Commented:
layer 2 for 2960.
10.10.10.1 is directly connected to the 2960.
it is not the same as the management subnet.
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leblancAccounting

Author

Commented:
Hmm... So it is difficult to locate the port where the device is connected to.
Don JohnstonInstructor
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leblancAccounting

Author

Commented:
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 JohnstonInstructor
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Top Expert 2015

Commented:
Right...  Just an extra step.

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