![]() It helps to Ping the subnet's broadcast address (e.g. ![]() As you can see, the 'sh arp' or 'sh ip arp' commands also give you the MAC addresses, so essentially the 'sh mac add' is only to get the port in which the device is connected. An example of a table record is in Step 4. The MAC address is shown in the 'Physical Address' column with the IP address in the 'Internet Address' column. Since you have the MAC address, scroll down the list to find the associated IP address. This lists a number of MAC addresses with the associated IP addresses. You might be in a situation where you don’t have the IP address of a device in a local network, but all you have is records of the MAC or hardware address. How would you communicate with a device when you don’t have the IP?
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