Client‘s Router Configuration: TCP/IP And AppleTalk

I configured my TCP/IP Control Panel, put in my IP address, subnet mask, router and domain name server. Then I closed the control panel and saved the changes. Next I opened up my AppleTalk Control Panel, set my user mode to Advanced, and clicked on the "Info" button. The router information was blank. Why was it blank when I put router information in the TCP/IP Control Panel?