Changing the Wi-Fi name (SSID) of a Linksys router with Classic web-based setup page
Your Wi-Fi name (SSID) is basically the router's wireless name and is one way of securing the network. The SSID is shared by all devices in your Wi-Fi and therefore, has to be unique since this will identify your network from the rest.
If you are using the WRT54G3G or a router that has a different UI, click here.
Follow the steps below to know how you can change the Wi-Fi name of your Linksys router with classic UI:
Access the router’s web-based setup page. For instructions, click here.
NOTE: If you are using Mac® to access the router's web-based setup page, click here.
When the router’s web-based setup page opens, click Wireless.
At the Wireless > Basic Wireless Settings page, select Manual.
Look for Network Name (SSID) and change it to your desired name for the Wi-Fi.