on networks N300RE Installation Manual page 5

EZ Setup displays.
4 Follow the EZ Setup steps.
When the extender joins the WiFi network, the Link Rate LED
lights green. The first time the extender joins a WiFi network, the
extender WiFi network name (SSID) changes to that network name,
with _EXT at the end. For example:
WiFi network name:
Extender network name: MyNetworkName_EXT
If the extender does not join the WiFi network, move the extender to a
different location with a better WiFi signal. For example, you might
need to move it higher, or to a position that is more in the open.
MyNetworkName
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