TP-Link TL-SG2224WEB User Manual
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Web Smart Gigabit Switch Family User's Guide
TL-SG2216WEB/TL-SG2224WEB
Binding: Three options are available. A further explanation is stated below. 
Number of MAC Address to Bind: Indicates the max number of MAC 
addresses that one switch port can bind.
Number of Bound MAC Address: Indicates the number of MAC 
addresses that already bind to a switch port.
State: Indicates the switch port state that may be binding, free port, secure 
port, unplugged or "--". A further explanation is stated below.
Further explanation
Options of dynamic binding:
1) 
Disable: Cause this port to learn MAC address freely.
2)
Enable: Cause the port to bind MAC addresses until the specified number
is reached.
3)
--: This option is available only if the port is in secure state, when this
option is selected, the port state keeps unchanged.
Port states:
1) 
Free Port: The binding function is disabled, and the port can learn MAC 
address freely.
2)
Binding: The port is in binding state, and its bound MAC address number 
is still less than the max number.
3)
Secure Port: The port has already bound the max number of MAC 
address in dynamic binding mode, or it was set to secure port manually in 
"Port Parameter" page.
4)
Unplugged: The port is a SFP port and unplugged yet. The dynamic 
binding function cannot be configured now.
5)
--: The port is a trunk member and its binding function cannot be 
configured.
