Today I was experimenting a bit with the user interface of my cisco router that is the default gateway of my LAN-network. I have two computers and a couple of smartphones atached to it trought WIFI 802.11. Unexperienced - I somehow clicked remove all in the wireless-tab. Then I lost all my connections. I thought - well DHCP should fix this, right? NOPE, a small hell started, really frustrated. What was the problem here? I thought the router is broadcasting information to the hosts and the host responds with its MAC-address. Then the router can lease private ip-addresses.
What I had to do - was to attach an ethernet-cable between one of the computers and the router - then in this wireless config I manually entered the computers MAC-addresses. After that - there was no problem for the router to realese IP-addresses and consequently connect wireless to internet.
SO my question - why could the router not automatically get the hosts MAC-addresses? This was no problem before so I cannot understand what happend in the cofiguration when I hassardly disabled the WLAN.
Would be extremely greatfull if someone could explain this?