Edimax Technology AR-7266WNA - Manual (Page 62)

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Ageing Time Set the Ethernet address ageing time. After the ageing
time of not having seen a frame coming from a certain
address, the bridge will time out (delete) and do not
forward the frame.
802.1d Spanning Tree Enable/disable the spanning tree protocol. When this
feature is enabled, this router will use the spanning tree
protocol to prevent from network loop happened in the
network (LAN Side).
When you finish, click ‘Apply Changes’. You’ll see the following message
displayed on web browser:
Press ‘Continue’ to save the settings made and back to web management
interface; press ‘Apply’ to save the settings made and restart the router so the
settings will take effect after it reboots.