Manual Name Resolution works then does not

edit

Hi, folks.

I am attempting to "Edit Resolved Name"

In the "Source" column, when I right-click on an IP address it allows for this function, but when I right-click on an Ethernet II address, the "Edit Resolved Name" is grayed-out.

I was changing these names the other day and it was apparently working, but now it isn't, so I was wondering if I was dreaming the other day when I thought that I was changing the Ethernet II addresses or if I have inadvertently changed some preference parameter.

Thank you for your time.