Port-Security Ntk-Mode - 3Com Switch 4500 Family Manual

The port-security max-mac-count command is irrelevant to the maximum number of MAC
addresses that can be learned on a port configured in MAC address management.
When there are online users on a port, you cannot perform the port-security max-mac-count
command on the port.
Examples
# Set the maximum number of MAC addresses allowed on the port to 100.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] port-security enable
[Sysname] interface Ethernet 1/0/1
[Sysname-Ethernet1/0/1] port-security max-mac-count 100

port-security ntk-mode

Syntax
port-security ntk-mode { ntkonly | ntk-withbroadcasts | ntk-withmulticasts }
undo port-security ntk-mode
View
Ethernet port view
Parameters
ntkonly: Allows the port to transmit only unicast packets with successfully-authenticated destination
MAC addresses.
ntk-withbroadcasts: Allows the port to transmit broadcast packets and unicast packets with
successfully-authenticated destination MAC addresses.
ntk-withmulticasts: Allows the port to transmit multicast packets, broadcast packets and unicast
packets with successfully-authenticated destination MAC addresses.
Description
Use the port-security ntk-mode command to configure the NTK feature on the port.
Use the undo port-security ntk-mode command to restore the default setting.
Be default, NTK is disabled on a port, namely all frames are allowed to be sent.
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