To avoid any prompting using 'copy run' (to start or tftp) use the global config command 'file prompt quiet'. This will then allow you to do single line saves.
As the previous respondee said, the 'incomplete' message occurs when the router is arping for an address that doesn't exit. To have so many incomplete entries you almost undoubtedly have a virus on your network which is pinging semi-random addresses ...
I've experienced this 'symbol error' on many 4507 gigabit ports. It always stops if you get your fibre connectors cleaned.Apparently only later versions of IOS report this error.
MAC address table does age out (after 600 secs) I think the 'lastseen' column is intended as a long term guide to when & where devices were attached to the network rather than an up to the minute indicator. So if you look at 'lastseen' it tells you w...
