In article news:<dh6ii0pui0tv38f8ai8lijk3bfebo5gpcp@4ax.com>, Poster
wrote:
MAC addresses are an ethernet thing. Ethernet switches know only about
MAC addresses. Switches don't look inside ethernet packets so they don't
see the IP addresses (and, indeed, they work even if the packets aren't
IP packets - on a Windows NetBEUI or Novell SPX/IPX network, for
example).

What happens, generally, is that when [L] reconnects to [A] it sends
data to the network which is seen by all the switches and they update
their routing tables accordingly.

Cheers,
Daniel.